Code
P1122
ACURA
P — Powertrain
Throttle Position Higher Than Expected
Views:
UK: 21
EN: 44
RU: 28
AI status
Completed
Completed
100%
Causes
- Faulty throttle position sensor (TPS) or throttle body assembly
- Open, shorted or high-resistance wiring/connectors between TPS and ECM
- Poor sensor reference voltage or ground (5V reference loss or ground resistance)
- Sticking/thrott le plate or mechanical binding in throttle body
- Faulty accelerator pedal position (APP) sensor causing correlation mismatch
- Contaminated throttle body (carbon build-up) affecting throttle movement
Symptoms
- Check Engine MIL illuminated
- Reduced engine power / limp-home mode
- Erratic or high idle, surging, or hesitation on acceleration
- Delayed or unexpected throttle response
- Possible trouble starting or inconsistent idle
What to check
- Read freeze frame and related codes; note engine rpm, throttle position, vehicle speed, and accelerator pedal position at fault
- Visually inspect throttle body, TPS connector and wiring for damage, corrosion, pin push-out or water intrusion
- Verify battery voltage and good battery/ECM grounds before testing sensors
- Scan live data: compare TPS voltage/percent vs accelerator pedal position (APP) and commanded throttle
- Check for mechanical throttle binding by moving throttle plate by hand with ignition off (if service manual permits)
Signal parameters
- TPS reference: typically +5.0 V (verify on vehicle; should be stable)
- TPS output at closed throttle: commonly ~0.2–1.0 V (varies by model)
- TPS output at wide open throttle: commonly ~4.0–4.8 V
- APP sensor outputs: two redundant voltages that should correlate and scale with pedal travel
- Correlation: TPS % and APP % should track closely; large deviation or TPS higher than APP for given condition triggers P1122
- Expected smooth, monotonic voltage change with throttle movement (no sudden jumps or dropouts)
Diagnostic algorithm
- Retrieve freeze frame and all stored codes. Note operating conditions when code set.
- Perform a visual inspection of throttle body, TPS connector, wiring harness, and ECM connector for damage, corrosion, or loose pins.
- With ignition ON (engine OFF), backprobe the TPS connector: verify stable +5V reference, good ground, and measure TPS output at closed throttle. Compare to manufacturer expected values.
- Slowly open and close the throttle by hand (or have technician gently depress accelerator) while watching TPS voltage/sensor percentage on a scan tool or multimeter; look for smooth linear change without spikes or dropouts.
- Compare TPS signal to accelerator pedal position (APP) sensor data on the scan tool. Check both APP sensor channels for correlation and correct operation.
- Check wiring continuity and resistance between TPS and ECM if voltages are out of range or intermittent. Wiggle-test harness to look for intermittent faults.
- Inspect and clean throttle body if mechanical sticking or heavy carbon deposits are present; re-test after cleaning.
- If wiring, grounds and sensor signals are good but TPS remains out of range, perform recommended ECU/throttle body relearn or idle relearn procedure. Clear codes and test drive to confirm.
- If code returns and all wiring and cleaning are good, replace the throttle body assembly or TPS per service manual. After replacement perform required relearn/calibration.
- If problems persist after replacement, evaluate ECM for internal fault or update software per manufacturer service information.
Likely causes
- Failed or out-of-spec TPS inside the throttle body
- Damaged wiring harness or corroded connector pins at TPS
- Poor ground or 5V reference to TPS
- Throttle plate sticking or binding due to carbon build-up
- Faulty APP sensor causing disagreement between pedal and throttle position
Fault status
Status
Throttle Position Higher Than Expected — TPS signal indicates throttle is more open than expected for current inputs/conditions. Check sensor, wiring, and throttle body for fault.
Repair difficulty: Medium
Diagnostic time: 1.0 to 3.0 hours
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Code
P1122
ALFA ROMEO
P — Powertrain
Throttle position sensor [signal implausible] | Throttle potentiometer track 2
Views:
UK: 2
EN: 6
RU: 8
AI status
Completed
Completed
100%
Causes
- Faulty throttle position sensor (TPS) or throttle body assembly
- Open, shorted or high-resistance wiring/connectors between TPS and ECM
- Poor sensor reference voltage or ground (5V reference loss or ground resistance)
- Sticking/thrott le plate or mechanical binding in throttle body
- Faulty accelerator pedal position (APP) sensor causing correlation mismatch
- Contaminated throttle body (carbon build-up) affecting throttle movement
Symptoms
- Check Engine MIL illuminated
- Reduced engine power / limp-home mode
- Erratic or high idle, surging, or hesitation on acceleration
- Delayed or unexpected throttle response
- Possible trouble starting or inconsistent idle
What to check
- Read freeze frame and related codes; note engine rpm, throttle position, vehicle speed, and accelerator pedal position at fault
- Visually inspect throttle body, TPS connector and wiring for damage, corrosion, pin push-out or water intrusion
- Verify battery voltage and good battery/ECM grounds before testing sensors
- Scan live data: compare TPS voltage/percent vs accelerator pedal position (APP) and commanded throttle
- Check for mechanical throttle binding by moving throttle plate by hand with ignition off (if service manual permits)
Signal parameters
- TPS reference: typically +5.0 V (verify on vehicle; should be stable)
- TPS output at closed throttle: commonly ~0.2–1.0 V (varies by model)
- TPS output at wide open throttle: commonly ~4.0–4.8 V
- APP sensor outputs: two redundant voltages that should correlate and scale with pedal travel
- Correlation: TPS % and APP % should track closely; large deviation or TPS higher than APP for given condition triggers P1122
- Expected smooth, monotonic voltage change with throttle movement (no sudden jumps or dropouts)
Diagnostic algorithm
- Retrieve freeze frame and all stored codes. Note operating conditions when code set.
- Perform a visual inspection of throttle body, TPS connector, wiring harness, and ECM connector for damage, corrosion, or loose pins.
- With ignition ON (engine OFF), backprobe the TPS connector: verify stable +5V reference, good ground, and measure TPS output at closed throttle. Compare to manufacturer expected values.
- Slowly open and close the throttle by hand (or have technician gently depress accelerator) while watching TPS voltage/sensor percentage on a scan tool or multimeter; look for smooth linear change without spikes or dropouts.
- Compare TPS signal to accelerator pedal position (APP) sensor data on the scan tool. Check both APP sensor channels for correlation and correct operation.
- Check wiring continuity and resistance between TPS and ECM if voltages are out of range or intermittent. Wiggle-test harness to look for intermittent faults.
- Inspect and clean throttle body if mechanical sticking or heavy carbon deposits are present; re-test after cleaning.
- If wiring, grounds and sensor signals are good but TPS remains out of range, perform recommended ECU/throttle body relearn or idle relearn procedure. Clear codes and test drive to confirm.
- If code returns and all wiring and cleaning are good, replace the throttle body assembly or TPS per service manual. After replacement perform required relearn/calibration.
- If problems persist after replacement, evaluate ECM for internal fault or update software per manufacturer service information.
Likely causes
- Failed or out-of-spec TPS inside the throttle body
- Damaged wiring harness or corroded connector pins at TPS
- Poor ground or 5V reference to TPS
- Throttle plate sticking or binding due to carbon build-up
- Faulty APP sensor causing disagreement between pedal and throttle position
Fault status
Status
Throttle Position Higher Than Expected — TPS signal indicates throttle is more open than expected for current inputs/conditions. Check sensor, wiring, and throttle body for fault.
Repair difficulty: Medium
Diagnostic time: 1.0 to 3.0 hours
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Code
P1122
BMW
P — Powertrain
Pedal Position Sensor 1 Low Input
Views:
UK: 25
EN: 45
RU: 26
AI status
Completed
Completed
100%
Causes
- Faulty throttle position sensor (TPS) or throttle body assembly
- Open, shorted or high-resistance wiring/connectors between TPS and ECM
- Poor sensor reference voltage or ground (5V reference loss or ground resistance)
- Sticking/thrott le plate or mechanical binding in throttle body
- Faulty accelerator pedal position (APP) sensor causing correlation mismatch
- Contaminated throttle body (carbon build-up) affecting throttle movement
Symptoms
- Check Engine MIL illuminated
- Reduced engine power / limp-home mode
- Erratic or high idle, surging, or hesitation on acceleration
- Delayed or unexpected throttle response
- Possible trouble starting or inconsistent idle
What to check
- Read freeze frame and related codes; note engine rpm, throttle position, vehicle speed, and accelerator pedal position at fault
- Visually inspect throttle body, TPS connector and wiring for damage, corrosion, pin push-out or water intrusion
- Verify battery voltage and good battery/ECM grounds before testing sensors
- Scan live data: compare TPS voltage/percent vs accelerator pedal position (APP) and commanded throttle
- Check for mechanical throttle binding by moving throttle plate by hand with ignition off (if service manual permits)
Signal parameters
- TPS reference: typically +5.0 V (verify on vehicle; should be stable)
- TPS output at closed throttle: commonly ~0.2–1.0 V (varies by model)
- TPS output at wide open throttle: commonly ~4.0–4.8 V
- APP sensor outputs: two redundant voltages that should correlate and scale with pedal travel
- Correlation: TPS % and APP % should track closely; large deviation or TPS higher than APP for given condition triggers P1122
- Expected smooth, monotonic voltage change with throttle movement (no sudden jumps or dropouts)
Diagnostic algorithm
- Retrieve freeze frame and all stored codes. Note operating conditions when code set.
- Perform a visual inspection of throttle body, TPS connector, wiring harness, and ECM connector for damage, corrosion, or loose pins.
- With ignition ON (engine OFF), backprobe the TPS connector: verify stable +5V reference, good ground, and measure TPS output at closed throttle. Compare to manufacturer expected values.
- Slowly open and close the throttle by hand (or have technician gently depress accelerator) while watching TPS voltage/sensor percentage on a scan tool or multimeter; look for smooth linear change without spikes or dropouts.
- Compare TPS signal to accelerator pedal position (APP) sensor data on the scan tool. Check both APP sensor channels for correlation and correct operation.
- Check wiring continuity and resistance between TPS and ECM if voltages are out of range or intermittent. Wiggle-test harness to look for intermittent faults.
- Inspect and clean throttle body if mechanical sticking or heavy carbon deposits are present; re-test after cleaning.
- If wiring, grounds and sensor signals are good but TPS remains out of range, perform recommended ECU/throttle body relearn or idle relearn procedure. Clear codes and test drive to confirm.
- If code returns and all wiring and cleaning are good, replace the throttle body assembly or TPS per service manual. After replacement perform required relearn/calibration.
- If problems persist after replacement, evaluate ECM for internal fault or update software per manufacturer service information.
Likely causes
- Failed or out-of-spec TPS inside the throttle body
- Damaged wiring harness or corroded connector pins at TPS
- Poor ground or 5V reference to TPS
- Throttle plate sticking or binding due to carbon build-up
- Faulty APP sensor causing disagreement between pedal and throttle position
Fault status
Status
Throttle Position Higher Than Expected — TPS signal indicates throttle is more open than expected for current inputs/conditions. Check sensor, wiring, and throttle body for fault.
Repair difficulty: Medium
Diagnostic time: 1.0 to 3.0 hours
Your experience will help others
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Was this AI description helpful?
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Code
P1122
BUICK
P — Powertrain
TP Sensor Circuit Intermittent Low Voltage
Views:
UK: 28
EN: 73
RU: 31
AI status
Completed
Completed
100%
Causes
- Faulty throttle position sensor (TPS) or throttle body assembly
- Open, shorted or high-resistance wiring/connectors between TPS and ECM
- Poor sensor reference voltage or ground (5V reference loss or ground resistance)
- Sticking/thrott le plate or mechanical binding in throttle body
- Faulty accelerator pedal position (APP) sensor causing correlation mismatch
- Contaminated throttle body (carbon build-up) affecting throttle movement
Symptoms
- Check Engine MIL illuminated
- Reduced engine power / limp-home mode
- Erratic or high idle, surging, or hesitation on acceleration
- Delayed or unexpected throttle response
- Possible trouble starting or inconsistent idle
What to check
- Read freeze frame and related codes; note engine rpm, throttle position, vehicle speed, and accelerator pedal position at fault
- Visually inspect throttle body, TPS connector and wiring for damage, corrosion, pin push-out or water intrusion
- Verify battery voltage and good battery/ECM grounds before testing sensors
- Scan live data: compare TPS voltage/percent vs accelerator pedal position (APP) and commanded throttle
- Check for mechanical throttle binding by moving throttle plate by hand with ignition off (if service manual permits)
Signal parameters
- TPS reference: typically +5.0 V (verify on vehicle; should be stable)
- TPS output at closed throttle: commonly ~0.2–1.0 V (varies by model)
- TPS output at wide open throttle: commonly ~4.0–4.8 V
- APP sensor outputs: two redundant voltages that should correlate and scale with pedal travel
- Correlation: TPS % and APP % should track closely; large deviation or TPS higher than APP for given condition triggers P1122
- Expected smooth, monotonic voltage change with throttle movement (no sudden jumps or dropouts)
Diagnostic algorithm
- Retrieve freeze frame and all stored codes. Note operating conditions when code set.
- Perform a visual inspection of throttle body, TPS connector, wiring harness, and ECM connector for damage, corrosion, or loose pins.
- With ignition ON (engine OFF), backprobe the TPS connector: verify stable +5V reference, good ground, and measure TPS output at closed throttle. Compare to manufacturer expected values.
- Slowly open and close the throttle by hand (or have technician gently depress accelerator) while watching TPS voltage/sensor percentage on a scan tool or multimeter; look for smooth linear change without spikes or dropouts.
- Compare TPS signal to accelerator pedal position (APP) sensor data on the scan tool. Check both APP sensor channels for correlation and correct operation.
- Check wiring continuity and resistance between TPS and ECM if voltages are out of range or intermittent. Wiggle-test harness to look for intermittent faults.
- Inspect and clean throttle body if mechanical sticking or heavy carbon deposits are present; re-test after cleaning.
- If wiring, grounds and sensor signals are good but TPS remains out of range, perform recommended ECU/throttle body relearn or idle relearn procedure. Clear codes and test drive to confirm.
- If code returns and all wiring and cleaning are good, replace the throttle body assembly or TPS per service manual. After replacement perform required relearn/calibration.
- If problems persist after replacement, evaluate ECM for internal fault or update software per manufacturer service information.
Likely causes
- Failed or out-of-spec TPS inside the throttle body
- Damaged wiring harness or corroded connector pins at TPS
- Poor ground or 5V reference to TPS
- Throttle plate sticking or binding due to carbon build-up
- Faulty APP sensor causing disagreement between pedal and throttle position
Fault status
Status
Throttle Position Higher Than Expected — TPS signal indicates throttle is more open than expected for current inputs/conditions. Check sensor, wiring, and throttle body for fault.
Repair difficulty: Medium
Diagnostic time: 1.0 to 3.0 hours
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
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0
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Code
P1122
CADILLAC
P — Powertrain
TP Sensor Circuit Intermittent Low Voltage
Views:
UK: 24
EN: 44
RU: 29
AI status
Completed
Completed
100%
Causes
- Faulty throttle position sensor (TPS) or throttle body assembly
- Open, shorted or high-resistance wiring/connectors between TPS and ECM
- Poor sensor reference voltage or ground (5V reference loss or ground resistance)
- Sticking/thrott le plate or mechanical binding in throttle body
- Faulty accelerator pedal position (APP) sensor causing correlation mismatch
- Contaminated throttle body (carbon build-up) affecting throttle movement
Symptoms
- Check Engine MIL illuminated
- Reduced engine power / limp-home mode
- Erratic or high idle, surging, or hesitation on acceleration
- Delayed or unexpected throttle response
- Possible trouble starting or inconsistent idle
What to check
- Read freeze frame and related codes; note engine rpm, throttle position, vehicle speed, and accelerator pedal position at fault
- Visually inspect throttle body, TPS connector and wiring for damage, corrosion, pin push-out or water intrusion
- Verify battery voltage and good battery/ECM grounds before testing sensors
- Scan live data: compare TPS voltage/percent vs accelerator pedal position (APP) and commanded throttle
- Check for mechanical throttle binding by moving throttle plate by hand with ignition off (if service manual permits)
Signal parameters
- TPS reference: typically +5.0 V (verify on vehicle; should be stable)
- TPS output at closed throttle: commonly ~0.2–1.0 V (varies by model)
- TPS output at wide open throttle: commonly ~4.0–4.8 V
- APP sensor outputs: two redundant voltages that should correlate and scale with pedal travel
- Correlation: TPS % and APP % should track closely; large deviation or TPS higher than APP for given condition triggers P1122
- Expected smooth, monotonic voltage change with throttle movement (no sudden jumps or dropouts)
Diagnostic algorithm
- Retrieve freeze frame and all stored codes. Note operating conditions when code set.
- Perform a visual inspection of throttle body, TPS connector, wiring harness, and ECM connector for damage, corrosion, or loose pins.
- With ignition ON (engine OFF), backprobe the TPS connector: verify stable +5V reference, good ground, and measure TPS output at closed throttle. Compare to manufacturer expected values.
- Slowly open and close the throttle by hand (or have technician gently depress accelerator) while watching TPS voltage/sensor percentage on a scan tool or multimeter; look for smooth linear change without spikes or dropouts.
- Compare TPS signal to accelerator pedal position (APP) sensor data on the scan tool. Check both APP sensor channels for correlation and correct operation.
- Check wiring continuity and resistance between TPS and ECM if voltages are out of range or intermittent. Wiggle-test harness to look for intermittent faults.
- Inspect and clean throttle body if mechanical sticking or heavy carbon deposits are present; re-test after cleaning.
- If wiring, grounds and sensor signals are good but TPS remains out of range, perform recommended ECU/throttle body relearn or idle relearn procedure. Clear codes and test drive to confirm.
- If code returns and all wiring and cleaning are good, replace the throttle body assembly or TPS per service manual. After replacement perform required relearn/calibration.
- If problems persist after replacement, evaluate ECM for internal fault or update software per manufacturer service information.
Likely causes
- Failed or out-of-spec TPS inside the throttle body
- Damaged wiring harness or corroded connector pins at TPS
- Poor ground or 5V reference to TPS
- Throttle plate sticking or binding due to carbon build-up
- Faulty APP sensor causing disagreement between pedal and throttle position
Fault status
Status
Throttle Position Higher Than Expected — TPS signal indicates throttle is more open than expected for current inputs/conditions. Check sensor, wiring, and throttle body for fault.
Repair difficulty: Medium
Diagnostic time: 1.0 to 3.0 hours
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
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0
Send to email
Code
P1122
CHEVROLET
P — Powertrain
TP Sensor Circuit Intermittent Low Voltage
Views:
UK: 25
EN: 44
RU: 27
AI status
Completed
Completed
100%
Causes
- Faulty throttle position sensor (TPS) or throttle body assembly
- Open, shorted or high-resistance wiring/connectors between TPS and ECM
- Poor sensor reference voltage or ground (5V reference loss or ground resistance)
- Sticking/thrott le plate or mechanical binding in throttle body
- Faulty accelerator pedal position (APP) sensor causing correlation mismatch
- Contaminated throttle body (carbon build-up) affecting throttle movement
Symptoms
- Check Engine MIL illuminated
- Reduced engine power / limp-home mode
- Erratic or high idle, surging, or hesitation on acceleration
- Delayed or unexpected throttle response
- Possible trouble starting or inconsistent idle
What to check
- Read freeze frame and related codes; note engine rpm, throttle position, vehicle speed, and accelerator pedal position at fault
- Visually inspect throttle body, TPS connector and wiring for damage, corrosion, pin push-out or water intrusion
- Verify battery voltage and good battery/ECM grounds before testing sensors
- Scan live data: compare TPS voltage/percent vs accelerator pedal position (APP) and commanded throttle
- Check for mechanical throttle binding by moving throttle plate by hand with ignition off (if service manual permits)
Signal parameters
- TPS reference: typically +5.0 V (verify on vehicle; should be stable)
- TPS output at closed throttle: commonly ~0.2–1.0 V (varies by model)
- TPS output at wide open throttle: commonly ~4.0–4.8 V
- APP sensor outputs: two redundant voltages that should correlate and scale with pedal travel
- Correlation: TPS % and APP % should track closely; large deviation or TPS higher than APP for given condition triggers P1122
- Expected smooth, monotonic voltage change with throttle movement (no sudden jumps or dropouts)
Diagnostic algorithm
- Retrieve freeze frame and all stored codes. Note operating conditions when code set.
- Perform a visual inspection of throttle body, TPS connector, wiring harness, and ECM connector for damage, corrosion, or loose pins.
- With ignition ON (engine OFF), backprobe the TPS connector: verify stable +5V reference, good ground, and measure TPS output at closed throttle. Compare to manufacturer expected values.
- Slowly open and close the throttle by hand (or have technician gently depress accelerator) while watching TPS voltage/sensor percentage on a scan tool or multimeter; look for smooth linear change without spikes or dropouts.
- Compare TPS signal to accelerator pedal position (APP) sensor data on the scan tool. Check both APP sensor channels for correlation and correct operation.
- Check wiring continuity and resistance between TPS and ECM if voltages are out of range or intermittent. Wiggle-test harness to look for intermittent faults.
- Inspect and clean throttle body if mechanical sticking or heavy carbon deposits are present; re-test after cleaning.
- If wiring, grounds and sensor signals are good but TPS remains out of range, perform recommended ECU/throttle body relearn or idle relearn procedure. Clear codes and test drive to confirm.
- If code returns and all wiring and cleaning are good, replace the throttle body assembly or TPS per service manual. After replacement perform required relearn/calibration.
- If problems persist after replacement, evaluate ECM for internal fault or update software per manufacturer service information.
Likely causes
- Failed or out-of-spec TPS inside the throttle body
- Damaged wiring harness or corroded connector pins at TPS
- Poor ground or 5V reference to TPS
- Throttle plate sticking or binding due to carbon build-up
- Faulty APP sensor causing disagreement between pedal and throttle position
Fault status
Status
Throttle Position Higher Than Expected — TPS signal indicates throttle is more open than expected for current inputs/conditions. Check sensor, wiring, and throttle body for fault.
Repair difficulty: Medium
Diagnostic time: 1.0 to 3.0 hours
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
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0
Send to email
Code
P1122
CHRYSLER
P — Powertrain
TP Sensor Circuit Intermittent Low Voltage
Views:
UK: 25
EN: 50
RU: 28
AI status
Completed
Completed
100%
Causes
- Faulty throttle position sensor (TPS) or throttle body assembly
- Open, shorted or high-resistance wiring/connectors between TPS and ECM
- Poor sensor reference voltage or ground (5V reference loss or ground resistance)
- Sticking/thrott le plate or mechanical binding in throttle body
- Faulty accelerator pedal position (APP) sensor causing correlation mismatch
- Contaminated throttle body (carbon build-up) affecting throttle movement
Symptoms
- Check Engine MIL illuminated
- Reduced engine power / limp-home mode
- Erratic or high idle, surging, or hesitation on acceleration
- Delayed or unexpected throttle response
- Possible trouble starting or inconsistent idle
What to check
- Read freeze frame and related codes; note engine rpm, throttle position, vehicle speed, and accelerator pedal position at fault
- Visually inspect throttle body, TPS connector and wiring for damage, corrosion, pin push-out or water intrusion
- Verify battery voltage and good battery/ECM grounds before testing sensors
- Scan live data: compare TPS voltage/percent vs accelerator pedal position (APP) and commanded throttle
- Check for mechanical throttle binding by moving throttle plate by hand with ignition off (if service manual permits)
Signal parameters
- TPS reference: typically +5.0 V (verify on vehicle; should be stable)
- TPS output at closed throttle: commonly ~0.2–1.0 V (varies by model)
- TPS output at wide open throttle: commonly ~4.0–4.8 V
- APP sensor outputs: two redundant voltages that should correlate and scale with pedal travel
- Correlation: TPS % and APP % should track closely; large deviation or TPS higher than APP for given condition triggers P1122
- Expected smooth, monotonic voltage change with throttle movement (no sudden jumps or dropouts)
Diagnostic algorithm
- Retrieve freeze frame and all stored codes. Note operating conditions when code set.
- Perform a visual inspection of throttle body, TPS connector, wiring harness, and ECM connector for damage, corrosion, or loose pins.
- With ignition ON (engine OFF), backprobe the TPS connector: verify stable +5V reference, good ground, and measure TPS output at closed throttle. Compare to manufacturer expected values.
- Slowly open and close the throttle by hand (or have technician gently depress accelerator) while watching TPS voltage/sensor percentage on a scan tool or multimeter; look for smooth linear change without spikes or dropouts.
- Compare TPS signal to accelerator pedal position (APP) sensor data on the scan tool. Check both APP sensor channels for correlation and correct operation.
- Check wiring continuity and resistance between TPS and ECM if voltages are out of range or intermittent. Wiggle-test harness to look for intermittent faults.
- Inspect and clean throttle body if mechanical sticking or heavy carbon deposits are present; re-test after cleaning.
- If wiring, grounds and sensor signals are good but TPS remains out of range, perform recommended ECU/throttle body relearn or idle relearn procedure. Clear codes and test drive to confirm.
- If code returns and all wiring and cleaning are good, replace the throttle body assembly or TPS per service manual. After replacement perform required relearn/calibration.
- If problems persist after replacement, evaluate ECM for internal fault or update software per manufacturer service information.
Likely causes
- Failed or out-of-spec TPS inside the throttle body
- Damaged wiring harness or corroded connector pins at TPS
- Poor ground or 5V reference to TPS
- Throttle plate sticking or binding due to carbon build-up
- Faulty APP sensor causing disagreement between pedal and throttle position
Fault status
Status
Throttle Position Higher Than Expected — TPS signal indicates throttle is more open than expected for current inputs/conditions. Check sensor, wiring, and throttle body for fault.
Repair difficulty: Medium
Diagnostic time: 1.0 to 3.0 hours
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
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0
Send to email
Code
P1122
DAEWOO
P — Powertrain
BOOSTER PRESSURE SNSR - HIGH
Views:
UK: 1
EN: 5
RU: 6
AI status
Completed
Completed
100%
Causes
- Faulty throttle position sensor (TPS) or throttle body assembly
- Open, shorted or high-resistance wiring/connectors between TPS and ECM
- Poor sensor reference voltage or ground (5V reference loss or ground resistance)
- Sticking/thrott le plate or mechanical binding in throttle body
- Faulty accelerator pedal position (APP) sensor causing correlation mismatch
- Contaminated throttle body (carbon build-up) affecting throttle movement
Symptoms
- Check Engine MIL illuminated
- Reduced engine power / limp-home mode
- Erratic or high idle, surging, or hesitation on acceleration
- Delayed or unexpected throttle response
- Possible trouble starting or inconsistent idle
What to check
- Read freeze frame and related codes; note engine rpm, throttle position, vehicle speed, and accelerator pedal position at fault
- Visually inspect throttle body, TPS connector and wiring for damage, corrosion, pin push-out or water intrusion
- Verify battery voltage and good battery/ECM grounds before testing sensors
- Scan live data: compare TPS voltage/percent vs accelerator pedal position (APP) and commanded throttle
- Check for mechanical throttle binding by moving throttle plate by hand with ignition off (if service manual permits)
Signal parameters
- TPS reference: typically +5.0 V (verify on vehicle; should be stable)
- TPS output at closed throttle: commonly ~0.2–1.0 V (varies by model)
- TPS output at wide open throttle: commonly ~4.0–4.8 V
- APP sensor outputs: two redundant voltages that should correlate and scale with pedal travel
- Correlation: TPS % and APP % should track closely; large deviation or TPS higher than APP for given condition triggers P1122
- Expected smooth, monotonic voltage change with throttle movement (no sudden jumps or dropouts)
Diagnostic algorithm
- Retrieve freeze frame and all stored codes. Note operating conditions when code set.
- Perform a visual inspection of throttle body, TPS connector, wiring harness, and ECM connector for damage, corrosion, or loose pins.
- With ignition ON (engine OFF), backprobe the TPS connector: verify stable +5V reference, good ground, and measure TPS output at closed throttle. Compare to manufacturer expected values.
- Slowly open and close the throttle by hand (or have technician gently depress accelerator) while watching TPS voltage/sensor percentage on a scan tool or multimeter; look for smooth linear change without spikes or dropouts.
- Compare TPS signal to accelerator pedal position (APP) sensor data on the scan tool. Check both APP sensor channels for correlation and correct operation.
- Check wiring continuity and resistance between TPS and ECM if voltages are out of range or intermittent. Wiggle-test harness to look for intermittent faults.
- Inspect and clean throttle body if mechanical sticking or heavy carbon deposits are present; re-test after cleaning.
- If wiring, grounds and sensor signals are good but TPS remains out of range, perform recommended ECU/throttle body relearn or idle relearn procedure. Clear codes and test drive to confirm.
- If code returns and all wiring and cleaning are good, replace the throttle body assembly or TPS per service manual. After replacement perform required relearn/calibration.
- If problems persist after replacement, evaluate ECM for internal fault or update software per manufacturer service information.
Likely causes
- Failed or out-of-spec TPS inside the throttle body
- Damaged wiring harness or corroded connector pins at TPS
- Poor ground or 5V reference to TPS
- Throttle plate sticking or binding due to carbon build-up
- Faulty APP sensor causing disagreement between pedal and throttle position
Fault status
Status
Throttle Position Higher Than Expected — TPS signal indicates throttle is more open than expected for current inputs/conditions. Check sensor, wiring, and throttle body for fault.
Repair difficulty: Medium
Diagnostic time: 1.0 to 3.0 hours
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Code
P1122
FIAT
P — Powertrain
Throttle position sensor [signal implausible] | Throttle potentiometer track 2
Views:
UK: 2
EN: 4
RU: 8
AI status
Completed
Completed
100%
Causes
- Faulty throttle position sensor (TPS) or throttle body assembly
- Open, shorted or high-resistance wiring/connectors between TPS and ECM
- Poor sensor reference voltage or ground (5V reference loss or ground resistance)
- Sticking/thrott le plate or mechanical binding in throttle body
- Faulty accelerator pedal position (APP) sensor causing correlation mismatch
- Contaminated throttle body (carbon build-up) affecting throttle movement
Symptoms
- Check Engine MIL illuminated
- Reduced engine power / limp-home mode
- Erratic or high idle, surging, or hesitation on acceleration
- Delayed or unexpected throttle response
- Possible trouble starting or inconsistent idle
What to check
- Read freeze frame and related codes; note engine rpm, throttle position, vehicle speed, and accelerator pedal position at fault
- Visually inspect throttle body, TPS connector and wiring for damage, corrosion, pin push-out or water intrusion
- Verify battery voltage and good battery/ECM grounds before testing sensors
- Scan live data: compare TPS voltage/percent vs accelerator pedal position (APP) and commanded throttle
- Check for mechanical throttle binding by moving throttle plate by hand with ignition off (if service manual permits)
Signal parameters
- TPS reference: typically +5.0 V (verify on vehicle; should be stable)
- TPS output at closed throttle: commonly ~0.2–1.0 V (varies by model)
- TPS output at wide open throttle: commonly ~4.0–4.8 V
- APP sensor outputs: two redundant voltages that should correlate and scale with pedal travel
- Correlation: TPS % and APP % should track closely; large deviation or TPS higher than APP for given condition triggers P1122
- Expected smooth, monotonic voltage change with throttle movement (no sudden jumps or dropouts)
Diagnostic algorithm
- Retrieve freeze frame and all stored codes. Note operating conditions when code set.
- Perform a visual inspection of throttle body, TPS connector, wiring harness, and ECM connector for damage, corrosion, or loose pins.
- With ignition ON (engine OFF), backprobe the TPS connector: verify stable +5V reference, good ground, and measure TPS output at closed throttle. Compare to manufacturer expected values.
- Slowly open and close the throttle by hand (or have technician gently depress accelerator) while watching TPS voltage/sensor percentage on a scan tool or multimeter; look for smooth linear change without spikes or dropouts.
- Compare TPS signal to accelerator pedal position (APP) sensor data on the scan tool. Check both APP sensor channels for correlation and correct operation.
- Check wiring continuity and resistance between TPS and ECM if voltages are out of range or intermittent. Wiggle-test harness to look for intermittent faults.
- Inspect and clean throttle body if mechanical sticking or heavy carbon deposits are present; re-test after cleaning.
- If wiring, grounds and sensor signals are good but TPS remains out of range, perform recommended ECU/throttle body relearn or idle relearn procedure. Clear codes and test drive to confirm.
- If code returns and all wiring and cleaning are good, replace the throttle body assembly or TPS per service manual. After replacement perform required relearn/calibration.
- If problems persist after replacement, evaluate ECM for internal fault or update software per manufacturer service information.
Likely causes
- Failed or out-of-spec TPS inside the throttle body
- Damaged wiring harness or corroded connector pins at TPS
- Poor ground or 5V reference to TPS
- Throttle plate sticking or binding due to carbon build-up
- Faulty APP sensor causing disagreement between pedal and throttle position
Fault status
Status
Throttle Position Higher Than Expected — TPS signal indicates throttle is more open than expected for current inputs/conditions. Check sensor, wiring, and throttle body for fault.
Repair difficulty: Medium
Diagnostic time: 1.0 to 3.0 hours
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Code
P1122
FORD
P — Powertrain
Throttle Position (TP) Sensor Circuit Intermittent Low Voltage
Views:
UK: 29
EN: 55
RU: 30
AI status
Completed
Completed
100%
Causes
- Faulty throttle position sensor (TPS) or throttle body assembly
- Open, shorted or high-resistance wiring/connectors between TPS and ECM
- Poor sensor reference voltage or ground (5V reference loss or ground resistance)
- Sticking/thrott le plate or mechanical binding in throttle body
- Faulty accelerator pedal position (APP) sensor causing correlation mismatch
- Contaminated throttle body (carbon build-up) affecting throttle movement
Symptoms
- Check Engine MIL illuminated
- Reduced engine power / limp-home mode
- Erratic or high idle, surging, or hesitation on acceleration
- Delayed or unexpected throttle response
- Possible trouble starting or inconsistent idle
What to check
- Read freeze frame and related codes; note engine rpm, throttle position, vehicle speed, and accelerator pedal position at fault
- Visually inspect throttle body, TPS connector and wiring for damage, corrosion, pin push-out or water intrusion
- Verify battery voltage and good battery/ECM grounds before testing sensors
- Scan live data: compare TPS voltage/percent vs accelerator pedal position (APP) and commanded throttle
- Check for mechanical throttle binding by moving throttle plate by hand with ignition off (if service manual permits)
Signal parameters
- TPS reference: typically +5.0 V (verify on vehicle; should be stable)
- TPS output at closed throttle: commonly ~0.2–1.0 V (varies by model)
- TPS output at wide open throttle: commonly ~4.0–4.8 V
- APP sensor outputs: two redundant voltages that should correlate and scale with pedal travel
- Correlation: TPS % and APP % should track closely; large deviation or TPS higher than APP for given condition triggers P1122
- Expected smooth, monotonic voltage change with throttle movement (no sudden jumps or dropouts)
Diagnostic algorithm
- Retrieve freeze frame and all stored codes. Note operating conditions when code set.
- Perform a visual inspection of throttle body, TPS connector, wiring harness, and ECM connector for damage, corrosion, or loose pins.
- With ignition ON (engine OFF), backprobe the TPS connector: verify stable +5V reference, good ground, and measure TPS output at closed throttle. Compare to manufacturer expected values.
- Slowly open and close the throttle by hand (or have technician gently depress accelerator) while watching TPS voltage/sensor percentage on a scan tool or multimeter; look for smooth linear change without spikes or dropouts.
- Compare TPS signal to accelerator pedal position (APP) sensor data on the scan tool. Check both APP sensor channels for correlation and correct operation.
- Check wiring continuity and resistance between TPS and ECM if voltages are out of range or intermittent. Wiggle-test harness to look for intermittent faults.
- Inspect and clean throttle body if mechanical sticking or heavy carbon deposits are present; re-test after cleaning.
- If wiring, grounds and sensor signals are good but TPS remains out of range, perform recommended ECU/throttle body relearn or idle relearn procedure. Clear codes and test drive to confirm.
- If code returns and all wiring and cleaning are good, replace the throttle body assembly or TPS per service manual. After replacement perform required relearn/calibration.
- If problems persist after replacement, evaluate ECM for internal fault or update software per manufacturer service information.
Likely causes
- Failed or out-of-spec TPS inside the throttle body
- Damaged wiring harness or corroded connector pins at TPS
- Poor ground or 5V reference to TPS
- Throttle plate sticking or binding due to carbon build-up
- Faulty APP sensor causing disagreement between pedal and throttle position
Fault status
Status
Throttle Position Higher Than Expected — TPS signal indicates throttle is more open than expected for current inputs/conditions. Check sensor, wiring, and throttle body for fault.
Repair difficulty: Medium
Diagnostic time: 1.0 to 3.0 hours
Your experience will help others
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Was this AI description helpful?
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Code
P1122
GM
P — Powertrain
TP Sensor Circuit Intermittent Low Voltage
Views:
UK: 23
EN: 42
RU: 29
AI status
Completed
Completed
100%
Causes
- Faulty throttle position sensor (TPS) or throttle body assembly
- Open, shorted or high-resistance wiring/connectors between TPS and ECM
- Poor sensor reference voltage or ground (5V reference loss or ground resistance)
- Sticking/thrott le plate or mechanical binding in throttle body
- Faulty accelerator pedal position (APP) sensor causing correlation mismatch
- Contaminated throttle body (carbon build-up) affecting throttle movement
Symptoms
- Check Engine MIL illuminated
- Reduced engine power / limp-home mode
- Erratic or high idle, surging, or hesitation on acceleration
- Delayed or unexpected throttle response
- Possible trouble starting or inconsistent idle
What to check
- Read freeze frame and related codes; note engine rpm, throttle position, vehicle speed, and accelerator pedal position at fault
- Visually inspect throttle body, TPS connector and wiring for damage, corrosion, pin push-out or water intrusion
- Verify battery voltage and good battery/ECM grounds before testing sensors
- Scan live data: compare TPS voltage/percent vs accelerator pedal position (APP) and commanded throttle
- Check for mechanical throttle binding by moving throttle plate by hand with ignition off (if service manual permits)
Signal parameters
- TPS reference: typically +5.0 V (verify on vehicle; should be stable)
- TPS output at closed throttle: commonly ~0.2–1.0 V (varies by model)
- TPS output at wide open throttle: commonly ~4.0–4.8 V
- APP sensor outputs: two redundant voltages that should correlate and scale with pedal travel
- Correlation: TPS % and APP % should track closely; large deviation or TPS higher than APP for given condition triggers P1122
- Expected smooth, monotonic voltage change with throttle movement (no sudden jumps or dropouts)
Diagnostic algorithm
- Retrieve freeze frame and all stored codes. Note operating conditions when code set.
- Perform a visual inspection of throttle body, TPS connector, wiring harness, and ECM connector for damage, corrosion, or loose pins.
- With ignition ON (engine OFF), backprobe the TPS connector: verify stable +5V reference, good ground, and measure TPS output at closed throttle. Compare to manufacturer expected values.
- Slowly open and close the throttle by hand (or have technician gently depress accelerator) while watching TPS voltage/sensor percentage on a scan tool or multimeter; look for smooth linear change without spikes or dropouts.
- Compare TPS signal to accelerator pedal position (APP) sensor data on the scan tool. Check both APP sensor channels for correlation and correct operation.
- Check wiring continuity and resistance between TPS and ECM if voltages are out of range or intermittent. Wiggle-test harness to look for intermittent faults.
- Inspect and clean throttle body if mechanical sticking or heavy carbon deposits are present; re-test after cleaning.
- If wiring, grounds and sensor signals are good but TPS remains out of range, perform recommended ECU/throttle body relearn or idle relearn procedure. Clear codes and test drive to confirm.
- If code returns and all wiring and cleaning are good, replace the throttle body assembly or TPS per service manual. After replacement perform required relearn/calibration.
- If problems persist after replacement, evaluate ECM for internal fault or update software per manufacturer service information.
Likely causes
- Failed or out-of-spec TPS inside the throttle body
- Damaged wiring harness or corroded connector pins at TPS
- Poor ground or 5V reference to TPS
- Throttle plate sticking or binding due to carbon build-up
- Faulty APP sensor causing disagreement between pedal and throttle position
Fault status
Status
Throttle Position Higher Than Expected — TPS signal indicates throttle is more open than expected for current inputs/conditions. Check sensor, wiring, and throttle body for fault.
Repair difficulty: Medium
Diagnostic time: 1.0 to 3.0 hours
Your experience will help others
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Was this AI description helpful?
Your feedback helps improve AI descriptions.
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0
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Code
P1122
GMC
P — Powertrain
TP Sensor Circuit Intermittent Low Voltage
Views:
UK: 28
EN: 71
RU: 32
AI status
Completed
Completed
100%
Causes
- Faulty throttle position sensor (TPS) or throttle body assembly
- Open, shorted or high-resistance wiring/connectors between TPS and ECM
- Poor sensor reference voltage or ground (5V reference loss or ground resistance)
- Sticking/thrott le plate or mechanical binding in throttle body
- Faulty accelerator pedal position (APP) sensor causing correlation mismatch
- Contaminated throttle body (carbon build-up) affecting throttle movement
Symptoms
- Check Engine MIL illuminated
- Reduced engine power / limp-home mode
- Erratic or high idle, surging, or hesitation on acceleration
- Delayed or unexpected throttle response
- Possible trouble starting or inconsistent idle
What to check
- Read freeze frame and related codes; note engine rpm, throttle position, vehicle speed, and accelerator pedal position at fault
- Visually inspect throttle body, TPS connector and wiring for damage, corrosion, pin push-out or water intrusion
- Verify battery voltage and good battery/ECM grounds before testing sensors
- Scan live data: compare TPS voltage/percent vs accelerator pedal position (APP) and commanded throttle
- Check for mechanical throttle binding by moving throttle plate by hand with ignition off (if service manual permits)
Signal parameters
- TPS reference: typically +5.0 V (verify on vehicle; should be stable)
- TPS output at closed throttle: commonly ~0.2–1.0 V (varies by model)
- TPS output at wide open throttle: commonly ~4.0–4.8 V
- APP sensor outputs: two redundant voltages that should correlate and scale with pedal travel
- Correlation: TPS % and APP % should track closely; large deviation or TPS higher than APP for given condition triggers P1122
- Expected smooth, monotonic voltage change with throttle movement (no sudden jumps or dropouts)
Diagnostic algorithm
- Retrieve freeze frame and all stored codes. Note operating conditions when code set.
- Perform a visual inspection of throttle body, TPS connector, wiring harness, and ECM connector for damage, corrosion, or loose pins.
- With ignition ON (engine OFF), backprobe the TPS connector: verify stable +5V reference, good ground, and measure TPS output at closed throttle. Compare to manufacturer expected values.
- Slowly open and close the throttle by hand (or have technician gently depress accelerator) while watching TPS voltage/sensor percentage on a scan tool or multimeter; look for smooth linear change without spikes or dropouts.
- Compare TPS signal to accelerator pedal position (APP) sensor data on the scan tool. Check both APP sensor channels for correlation and correct operation.
- Check wiring continuity and resistance between TPS and ECM if voltages are out of range or intermittent. Wiggle-test harness to look for intermittent faults.
- Inspect and clean throttle body if mechanical sticking or heavy carbon deposits are present; re-test after cleaning.
- If wiring, grounds and sensor signals are good but TPS remains out of range, perform recommended ECU/throttle body relearn or idle relearn procedure. Clear codes and test drive to confirm.
- If code returns and all wiring and cleaning are good, replace the throttle body assembly or TPS per service manual. After replacement perform required relearn/calibration.
- If problems persist after replacement, evaluate ECM for internal fault or update software per manufacturer service information.
Likely causes
- Failed or out-of-spec TPS inside the throttle body
- Damaged wiring harness or corroded connector pins at TPS
- Poor ground or 5V reference to TPS
- Throttle plate sticking or binding due to carbon build-up
- Faulty APP sensor causing disagreement between pedal and throttle position
Fault status
Status
Throttle Position Higher Than Expected — TPS signal indicates throttle is more open than expected for current inputs/conditions. Check sensor, wiring, and throttle body for fault.
Repair difficulty: Medium
Diagnostic time: 1.0 to 3.0 hours
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
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0
Send to email
Code
P1122
GWM
P — Powertrain
- Throttle Position (TP) Sensor Circuit Low Voltage
Views:
UK: 1
EN: 5
RU: 6
AI status
Completed
Completed
100%
Causes
- Faulty throttle position sensor (TPS) or throttle body assembly
- Open, shorted or high-resistance wiring/connectors between TPS and ECM
- Poor sensor reference voltage or ground (5V reference loss or ground resistance)
- Sticking/thrott le plate or mechanical binding in throttle body
- Faulty accelerator pedal position (APP) sensor causing correlation mismatch
- Contaminated throttle body (carbon build-up) affecting throttle movement
Symptoms
- Check Engine MIL illuminated
- Reduced engine power / limp-home mode
- Erratic or high idle, surging, or hesitation on acceleration
- Delayed or unexpected throttle response
- Possible trouble starting or inconsistent idle
What to check
- Read freeze frame and related codes; note engine rpm, throttle position, vehicle speed, and accelerator pedal position at fault
- Visually inspect throttle body, TPS connector and wiring for damage, corrosion, pin push-out or water intrusion
- Verify battery voltage and good battery/ECM grounds before testing sensors
- Scan live data: compare TPS voltage/percent vs accelerator pedal position (APP) and commanded throttle
- Check for mechanical throttle binding by moving throttle plate by hand with ignition off (if service manual permits)
Signal parameters
- TPS reference: typically +5.0 V (verify on vehicle; should be stable)
- TPS output at closed throttle: commonly ~0.2–1.0 V (varies by model)
- TPS output at wide open throttle: commonly ~4.0–4.8 V
- APP sensor outputs: two redundant voltages that should correlate and scale with pedal travel
- Correlation: TPS % and APP % should track closely; large deviation or TPS higher than APP for given condition triggers P1122
- Expected smooth, monotonic voltage change with throttle movement (no sudden jumps or dropouts)
Diagnostic algorithm
- Retrieve freeze frame and all stored codes. Note operating conditions when code set.
- Perform a visual inspection of throttle body, TPS connector, wiring harness, and ECM connector for damage, corrosion, or loose pins.
- With ignition ON (engine OFF), backprobe the TPS connector: verify stable +5V reference, good ground, and measure TPS output at closed throttle. Compare to manufacturer expected values.
- Slowly open and close the throttle by hand (or have technician gently depress accelerator) while watching TPS voltage/sensor percentage on a scan tool or multimeter; look for smooth linear change without spikes or dropouts.
- Compare TPS signal to accelerator pedal position (APP) sensor data on the scan tool. Check both APP sensor channels for correlation and correct operation.
- Check wiring continuity and resistance between TPS and ECM if voltages are out of range or intermittent. Wiggle-test harness to look for intermittent faults.
- Inspect and clean throttle body if mechanical sticking or heavy carbon deposits are present; re-test after cleaning.
- If wiring, grounds and sensor signals are good but TPS remains out of range, perform recommended ECU/throttle body relearn or idle relearn procedure. Clear codes and test drive to confirm.
- If code returns and all wiring and cleaning are good, replace the throttle body assembly or TPS per service manual. After replacement perform required relearn/calibration.
- If problems persist after replacement, evaluate ECM for internal fault or update software per manufacturer service information.
Likely causes
- Failed or out-of-spec TPS inside the throttle body
- Damaged wiring harness or corroded connector pins at TPS
- Poor ground or 5V reference to TPS
- Throttle plate sticking or binding due to carbon build-up
- Faulty APP sensor causing disagreement between pedal and throttle position
Fault status
Status
Throttle Position Higher Than Expected — TPS signal indicates throttle is more open than expected for current inputs/conditions. Check sensor, wiring, and throttle body for fault.
Repair difficulty: Medium
Diagnostic time: 1.0 to 3.0 hours
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
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0
Send to email
Code
P1122
HONDA
P — Powertrain
Throttle Position Higher Than Expected
Views:
UK: 26
EN: 44
RU: 29
AI status
Completed
Completed
100%
Causes
- Faulty throttle position sensor (TPS) or throttle body assembly
- Open, shorted or high-resistance wiring/connectors between TPS and ECM
- Poor sensor reference voltage or ground (5V reference loss or ground resistance)
- Sticking/thrott le plate or mechanical binding in throttle body
- Faulty accelerator pedal position (APP) sensor causing correlation mismatch
- Contaminated throttle body (carbon build-up) affecting throttle movement
Symptoms
- Check Engine MIL illuminated
- Reduced engine power / limp-home mode
- Erratic or high idle, surging, or hesitation on acceleration
- Delayed or unexpected throttle response
- Possible trouble starting or inconsistent idle
What to check
- Read freeze frame and related codes; note engine rpm, throttle position, vehicle speed, and accelerator pedal position at fault
- Visually inspect throttle body, TPS connector and wiring for damage, corrosion, pin push-out or water intrusion
- Verify battery voltage and good battery/ECM grounds before testing sensors
- Scan live data: compare TPS voltage/percent vs accelerator pedal position (APP) and commanded throttle
- Check for mechanical throttle binding by moving throttle plate by hand with ignition off (if service manual permits)
Signal parameters
- TPS reference: typically +5.0 V (verify on vehicle; should be stable)
- TPS output at closed throttle: commonly ~0.2–1.0 V (varies by model)
- TPS output at wide open throttle: commonly ~4.0–4.8 V
- APP sensor outputs: two redundant voltages that should correlate and scale with pedal travel
- Correlation: TPS % and APP % should track closely; large deviation or TPS higher than APP for given condition triggers P1122
- Expected smooth, monotonic voltage change with throttle movement (no sudden jumps or dropouts)
Diagnostic algorithm
- Retrieve freeze frame and all stored codes. Note operating conditions when code set.
- Perform a visual inspection of throttle body, TPS connector, wiring harness, and ECM connector for damage, corrosion, or loose pins.
- With ignition ON (engine OFF), backprobe the TPS connector: verify stable +5V reference, good ground, and measure TPS output at closed throttle. Compare to manufacturer expected values.
- Slowly open and close the throttle by hand (or have technician gently depress accelerator) while watching TPS voltage/sensor percentage on a scan tool or multimeter; look for smooth linear change without spikes or dropouts.
- Compare TPS signal to accelerator pedal position (APP) sensor data on the scan tool. Check both APP sensor channels for correlation and correct operation.
- Check wiring continuity and resistance between TPS and ECM if voltages are out of range or intermittent. Wiggle-test harness to look for intermittent faults.
- Inspect and clean throttle body if mechanical sticking or heavy carbon deposits are present; re-test after cleaning.
- If wiring, grounds and sensor signals are good but TPS remains out of range, perform recommended ECU/throttle body relearn or idle relearn procedure. Clear codes and test drive to confirm.
- If code returns and all wiring and cleaning are good, replace the throttle body assembly or TPS per service manual. After replacement perform required relearn/calibration.
- If problems persist after replacement, evaluate ECM for internal fault or update software per manufacturer service information.
Likely causes
- Failed or out-of-spec TPS inside the throttle body
- Damaged wiring harness or corroded connector pins at TPS
- Poor ground or 5V reference to TPS
- Throttle plate sticking or binding due to carbon build-up
- Faulty APP sensor causing disagreement between pedal and throttle position
Fault status
Status
Throttle Position Higher Than Expected — TPS signal indicates throttle is more open than expected for current inputs/conditions. Check sensor, wiring, and throttle body for fault.
Repair difficulty: Medium
Diagnostic time: 1.0 to 3.0 hours
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email
Code
P1122
HUMMER
P — Powertrain
Throttle Position (TP) Sensor Circuit Intermittent Low Voltage
Views:
UK: 8
EN: 13
RU: 15
AI status
Completed
Completed
100%
Causes
- Faulty throttle position sensor (TPS) or throttle body assembly
- Open, shorted or high-resistance wiring/connectors between TPS and ECM
- Poor sensor reference voltage or ground (5V reference loss or ground resistance)
- Sticking/thrott le plate or mechanical binding in throttle body
- Faulty accelerator pedal position (APP) sensor causing correlation mismatch
- Contaminated throttle body (carbon build-up) affecting throttle movement
Symptoms
- Check Engine MIL illuminated
- Reduced engine power / limp-home mode
- Erratic or high idle, surging, or hesitation on acceleration
- Delayed or unexpected throttle response
- Possible trouble starting or inconsistent idle
What to check
- Read freeze frame and related codes; note engine rpm, throttle position, vehicle speed, and accelerator pedal position at fault
- Visually inspect throttle body, TPS connector and wiring for damage, corrosion, pin push-out or water intrusion
- Verify battery voltage and good battery/ECM grounds before testing sensors
- Scan live data: compare TPS voltage/percent vs accelerator pedal position (APP) and commanded throttle
- Check for mechanical throttle binding by moving throttle plate by hand with ignition off (if service manual permits)
Signal parameters
- TPS reference: typically +5.0 V (verify on vehicle; should be stable)
- TPS output at closed throttle: commonly ~0.2–1.0 V (varies by model)
- TPS output at wide open throttle: commonly ~4.0–4.8 V
- APP sensor outputs: two redundant voltages that should correlate and scale with pedal travel
- Correlation: TPS % and APP % should track closely; large deviation or TPS higher than APP for given condition triggers P1122
- Expected smooth, monotonic voltage change with throttle movement (no sudden jumps or dropouts)
Diagnostic algorithm
- Retrieve freeze frame and all stored codes. Note operating conditions when code set.
- Perform a visual inspection of throttle body, TPS connector, wiring harness, and ECM connector for damage, corrosion, or loose pins.
- With ignition ON (engine OFF), backprobe the TPS connector: verify stable +5V reference, good ground, and measure TPS output at closed throttle. Compare to manufacturer expected values.
- Slowly open and close the throttle by hand (or have technician gently depress accelerator) while watching TPS voltage/sensor percentage on a scan tool or multimeter; look for smooth linear change without spikes or dropouts.
- Compare TPS signal to accelerator pedal position (APP) sensor data on the scan tool. Check both APP sensor channels for correlation and correct operation.
- Check wiring continuity and resistance between TPS and ECM if voltages are out of range or intermittent. Wiggle-test harness to look for intermittent faults.
- Inspect and clean throttle body if mechanical sticking or heavy carbon deposits are present; re-test after cleaning.
- If wiring, grounds and sensor signals are good but TPS remains out of range, perform recommended ECU/throttle body relearn or idle relearn procedure. Clear codes and test drive to confirm.
- If code returns and all wiring and cleaning are good, replace the throttle body assembly or TPS per service manual. After replacement perform required relearn/calibration.
- If problems persist after replacement, evaluate ECM for internal fault or update software per manufacturer service information.
Likely causes
- Failed or out-of-spec TPS inside the throttle body
- Damaged wiring harness or corroded connector pins at TPS
- Poor ground or 5V reference to TPS
- Throttle plate sticking or binding due to carbon build-up
- Faulty APP sensor causing disagreement between pedal and throttle position
Fault status
Status
Throttle Position Higher Than Expected — TPS signal indicates throttle is more open than expected for current inputs/conditions. Check sensor, wiring, and throttle body for fault.
Repair difficulty: Medium
Diagnostic time: 1.0 to 3.0 hours
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email
Code
P1122
INFINITI
P — Powertrain
Throttle Position Higher Than Expected
Views:
UK: 24
EN: 46
RU: 26
AI status
Completed
Completed
100%
Causes
- Faulty throttle position sensor (TPS) or throttle body assembly
- Open, shorted or high-resistance wiring/connectors between TPS and ECM
- Poor sensor reference voltage or ground (5V reference loss or ground resistance)
- Sticking/thrott le plate or mechanical binding in throttle body
- Faulty accelerator pedal position (APP) sensor causing correlation mismatch
- Contaminated throttle body (carbon build-up) affecting throttle movement
Symptoms
- Check Engine MIL illuminated
- Reduced engine power / limp-home mode
- Erratic or high idle, surging, or hesitation on acceleration
- Delayed or unexpected throttle response
- Possible trouble starting or inconsistent idle
What to check
- Read freeze frame and related codes; note engine rpm, throttle position, vehicle speed, and accelerator pedal position at fault
- Visually inspect throttle body, TPS connector and wiring for damage, corrosion, pin push-out or water intrusion
- Verify battery voltage and good battery/ECM grounds before testing sensors
- Scan live data: compare TPS voltage/percent vs accelerator pedal position (APP) and commanded throttle
- Check for mechanical throttle binding by moving throttle plate by hand with ignition off (if service manual permits)
Signal parameters
- TPS reference: typically +5.0 V (verify on vehicle; should be stable)
- TPS output at closed throttle: commonly ~0.2–1.0 V (varies by model)
- TPS output at wide open throttle: commonly ~4.0–4.8 V
- APP sensor outputs: two redundant voltages that should correlate and scale with pedal travel
- Correlation: TPS % and APP % should track closely; large deviation or TPS higher than APP for given condition triggers P1122
- Expected smooth, monotonic voltage change with throttle movement (no sudden jumps or dropouts)
Diagnostic algorithm
- Retrieve freeze frame and all stored codes. Note operating conditions when code set.
- Perform a visual inspection of throttle body, TPS connector, wiring harness, and ECM connector for damage, corrosion, or loose pins.
- With ignition ON (engine OFF), backprobe the TPS connector: verify stable +5V reference, good ground, and measure TPS output at closed throttle. Compare to manufacturer expected values.
- Slowly open and close the throttle by hand (or have technician gently depress accelerator) while watching TPS voltage/sensor percentage on a scan tool or multimeter; look for smooth linear change without spikes or dropouts.
- Compare TPS signal to accelerator pedal position (APP) sensor data on the scan tool. Check both APP sensor channels for correlation and correct operation.
- Check wiring continuity and resistance between TPS and ECM if voltages are out of range or intermittent. Wiggle-test harness to look for intermittent faults.
- Inspect and clean throttle body if mechanical sticking or heavy carbon deposits are present; re-test after cleaning.
- If wiring, grounds and sensor signals are good but TPS remains out of range, perform recommended ECU/throttle body relearn or idle relearn procedure. Clear codes and test drive to confirm.
- If code returns and all wiring and cleaning are good, replace the throttle body assembly or TPS per service manual. After replacement perform required relearn/calibration.
- If problems persist after replacement, evaluate ECM for internal fault or update software per manufacturer service information.
Likely causes
- Failed or out-of-spec TPS inside the throttle body
- Damaged wiring harness or corroded connector pins at TPS
- Poor ground or 5V reference to TPS
- Throttle plate sticking or binding due to carbon build-up
- Faulty APP sensor causing disagreement between pedal and throttle position
Fault status
Status
Throttle Position Higher Than Expected — TPS signal indicates throttle is more open than expected for current inputs/conditions. Check sensor, wiring, and throttle body for fault.
Repair difficulty: Medium
Diagnostic time: 1.0 to 3.0 hours
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Code
P1122
JAGUAR
P — Powertrain
Pedal Position Sensor A Circuit Low Input
Views:
UK: 27
EN: 53
RU: 33
AI status
Completed
Completed
100%
Causes
- Faulty throttle position sensor (TPS) or throttle body assembly
- Open, shorted or high-resistance wiring/connectors between TPS and ECM
- Poor sensor reference voltage or ground (5V reference loss or ground resistance)
- Sticking/thrott le plate or mechanical binding in throttle body
- Faulty accelerator pedal position (APP) sensor causing correlation mismatch
- Contaminated throttle body (carbon build-up) affecting throttle movement
Symptoms
- Check Engine MIL illuminated
- Reduced engine power / limp-home mode
- Erratic or high idle, surging, or hesitation on acceleration
- Delayed or unexpected throttle response
- Possible trouble starting or inconsistent idle
What to check
- Read freeze frame and related codes; note engine rpm, throttle position, vehicle speed, and accelerator pedal position at fault
- Visually inspect throttle body, TPS connector and wiring for damage, corrosion, pin push-out or water intrusion
- Verify battery voltage and good battery/ECM grounds before testing sensors
- Scan live data: compare TPS voltage/percent vs accelerator pedal position (APP) and commanded throttle
- Check for mechanical throttle binding by moving throttle plate by hand with ignition off (if service manual permits)
Signal parameters
- TPS reference: typically +5.0 V (verify on vehicle; should be stable)
- TPS output at closed throttle: commonly ~0.2–1.0 V (varies by model)
- TPS output at wide open throttle: commonly ~4.0–4.8 V
- APP sensor outputs: two redundant voltages that should correlate and scale with pedal travel
- Correlation: TPS % and APP % should track closely; large deviation or TPS higher than APP for given condition triggers P1122
- Expected smooth, monotonic voltage change with throttle movement (no sudden jumps or dropouts)
Diagnostic algorithm
- Retrieve freeze frame and all stored codes. Note operating conditions when code set.
- Perform a visual inspection of throttle body, TPS connector, wiring harness, and ECM connector for damage, corrosion, or loose pins.
- With ignition ON (engine OFF), backprobe the TPS connector: verify stable +5V reference, good ground, and measure TPS output at closed throttle. Compare to manufacturer expected values.
- Slowly open and close the throttle by hand (or have technician gently depress accelerator) while watching TPS voltage/sensor percentage on a scan tool or multimeter; look for smooth linear change without spikes or dropouts.
- Compare TPS signal to accelerator pedal position (APP) sensor data on the scan tool. Check both APP sensor channels for correlation and correct operation.
- Check wiring continuity and resistance between TPS and ECM if voltages are out of range or intermittent. Wiggle-test harness to look for intermittent faults.
- Inspect and clean throttle body if mechanical sticking or heavy carbon deposits are present; re-test after cleaning.
- If wiring, grounds and sensor signals are good but TPS remains out of range, perform recommended ECU/throttle body relearn or idle relearn procedure. Clear codes and test drive to confirm.
- If code returns and all wiring and cleaning are good, replace the throttle body assembly or TPS per service manual. After replacement perform required relearn/calibration.
- If problems persist after replacement, evaluate ECM for internal fault or update software per manufacturer service information.
Likely causes
- Failed or out-of-spec TPS inside the throttle body
- Damaged wiring harness or corroded connector pins at TPS
- Poor ground or 5V reference to TPS
- Throttle plate sticking or binding due to carbon build-up
- Faulty APP sensor causing disagreement between pedal and throttle position
Fault status
Status
Throttle Position Higher Than Expected — TPS signal indicates throttle is more open than expected for current inputs/conditions. Check sensor, wiring, and throttle body for fault.
Repair difficulty: Medium
Diagnostic time: 1.0 to 3.0 hours
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Code
P1122
LAND ROVER
P — Powertrain
Pedal Demand Sensor Low Circuit Input
Views:
UK: 4
EN: 9
RU: 10
AI status
Completed
Completed
100%
Causes
- Faulty throttle position sensor (TPS) or throttle body assembly
- Open, shorted or high-resistance wiring/connectors between TPS and ECM
- Poor sensor reference voltage or ground (5V reference loss or ground resistance)
- Sticking/thrott le plate or mechanical binding in throttle body
- Faulty accelerator pedal position (APP) sensor causing correlation mismatch
- Contaminated throttle body (carbon build-up) affecting throttle movement
Symptoms
- Check Engine MIL illuminated
- Reduced engine power / limp-home mode
- Erratic or high idle, surging, or hesitation on acceleration
- Delayed or unexpected throttle response
- Possible trouble starting or inconsistent idle
What to check
- Read freeze frame and related codes; note engine rpm, throttle position, vehicle speed, and accelerator pedal position at fault
- Visually inspect throttle body, TPS connector and wiring for damage, corrosion, pin push-out or water intrusion
- Verify battery voltage and good battery/ECM grounds before testing sensors
- Scan live data: compare TPS voltage/percent vs accelerator pedal position (APP) and commanded throttle
- Check for mechanical throttle binding by moving throttle plate by hand with ignition off (if service manual permits)
Signal parameters
- TPS reference: typically +5.0 V (verify on vehicle; should be stable)
- TPS output at closed throttle: commonly ~0.2–1.0 V (varies by model)
- TPS output at wide open throttle: commonly ~4.0–4.8 V
- APP sensor outputs: two redundant voltages that should correlate and scale with pedal travel
- Correlation: TPS % and APP % should track closely; large deviation or TPS higher than APP for given condition triggers P1122
- Expected smooth, monotonic voltage change with throttle movement (no sudden jumps or dropouts)
Diagnostic algorithm
- Retrieve freeze frame and all stored codes. Note operating conditions when code set.
- Perform a visual inspection of throttle body, TPS connector, wiring harness, and ECM connector for damage, corrosion, or loose pins.
- With ignition ON (engine OFF), backprobe the TPS connector: verify stable +5V reference, good ground, and measure TPS output at closed throttle. Compare to manufacturer expected values.
- Slowly open and close the throttle by hand (or have technician gently depress accelerator) while watching TPS voltage/sensor percentage on a scan tool or multimeter; look for smooth linear change without spikes or dropouts.
- Compare TPS signal to accelerator pedal position (APP) sensor data on the scan tool. Check both APP sensor channels for correlation and correct operation.
- Check wiring continuity and resistance between TPS and ECM if voltages are out of range or intermittent. Wiggle-test harness to look for intermittent faults.
- Inspect and clean throttle body if mechanical sticking or heavy carbon deposits are present; re-test after cleaning.
- If wiring, grounds and sensor signals are good but TPS remains out of range, perform recommended ECU/throttle body relearn or idle relearn procedure. Clear codes and test drive to confirm.
- If code returns and all wiring and cleaning are good, replace the throttle body assembly or TPS per service manual. After replacement perform required relearn/calibration.
- If problems persist after replacement, evaluate ECM for internal fault or update software per manufacturer service information.
Likely causes
- Failed or out-of-spec TPS inside the throttle body
- Damaged wiring harness or corroded connector pins at TPS
- Poor ground or 5V reference to TPS
- Throttle plate sticking or binding due to carbon build-up
- Faulty APP sensor causing disagreement between pedal and throttle position
Fault status
Status
Throttle Position Higher Than Expected — TPS signal indicates throttle is more open than expected for current inputs/conditions. Check sensor, wiring, and throttle body for fault.
Repair difficulty: Medium
Diagnostic time: 1.0 to 3.0 hours
Workshop Manuals
Repair manuals for LAND ROVER
3
Land Rover Defender 300Tdi — Workshop Manual (1996 model year)
Workshop Manual199,00 UAH
Land Rover Defender Workshop Manual Supplement & Body Repair Manual (1999 & 2002 MY)
Workshop Manual199,00 UAH
Land Rover Range Rover — Electrical Library (LRL 0453ENG, 2002)
Workshop Manual199,00 UAH
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Code
P1122
LINCOLN
P — Powertrain
Throttle Position TP Sensor Circuit Intermittent Low Voltage
Views:
UK: 27
EN: 52
RU: 28
AI status
Completed
Completed
100%
Causes
- Faulty throttle position sensor (TPS) or throttle body assembly
- Open, shorted or high-resistance wiring/connectors between TPS and ECM
- Poor sensor reference voltage or ground (5V reference loss or ground resistance)
- Sticking/thrott le plate or mechanical binding in throttle body
- Faulty accelerator pedal position (APP) sensor causing correlation mismatch
- Contaminated throttle body (carbon build-up) affecting throttle movement
Symptoms
- Check Engine MIL illuminated
- Reduced engine power / limp-home mode
- Erratic or high idle, surging, or hesitation on acceleration
- Delayed or unexpected throttle response
- Possible trouble starting or inconsistent idle
What to check
- Read freeze frame and related codes; note engine rpm, throttle position, vehicle speed, and accelerator pedal position at fault
- Visually inspect throttle body, TPS connector and wiring for damage, corrosion, pin push-out or water intrusion
- Verify battery voltage and good battery/ECM grounds before testing sensors
- Scan live data: compare TPS voltage/percent vs accelerator pedal position (APP) and commanded throttle
- Check for mechanical throttle binding by moving throttle plate by hand with ignition off (if service manual permits)
Signal parameters
- TPS reference: typically +5.0 V (verify on vehicle; should be stable)
- TPS output at closed throttle: commonly ~0.2–1.0 V (varies by model)
- TPS output at wide open throttle: commonly ~4.0–4.8 V
- APP sensor outputs: two redundant voltages that should correlate and scale with pedal travel
- Correlation: TPS % and APP % should track closely; large deviation or TPS higher than APP for given condition triggers P1122
- Expected smooth, monotonic voltage change with throttle movement (no sudden jumps or dropouts)
Diagnostic algorithm
- Retrieve freeze frame and all stored codes. Note operating conditions when code set.
- Perform a visual inspection of throttle body, TPS connector, wiring harness, and ECM connector for damage, corrosion, or loose pins.
- With ignition ON (engine OFF), backprobe the TPS connector: verify stable +5V reference, good ground, and measure TPS output at closed throttle. Compare to manufacturer expected values.
- Slowly open and close the throttle by hand (or have technician gently depress accelerator) while watching TPS voltage/sensor percentage on a scan tool or multimeter; look for smooth linear change without spikes or dropouts.
- Compare TPS signal to accelerator pedal position (APP) sensor data on the scan tool. Check both APP sensor channels for correlation and correct operation.
- Check wiring continuity and resistance between TPS and ECM if voltages are out of range or intermittent. Wiggle-test harness to look for intermittent faults.
- Inspect and clean throttle body if mechanical sticking or heavy carbon deposits are present; re-test after cleaning.
- If wiring, grounds and sensor signals are good but TPS remains out of range, perform recommended ECU/throttle body relearn or idle relearn procedure. Clear codes and test drive to confirm.
- If code returns and all wiring and cleaning are good, replace the throttle body assembly or TPS per service manual. After replacement perform required relearn/calibration.
- If problems persist after replacement, evaluate ECM for internal fault or update software per manufacturer service information.
Likely causes
- Failed or out-of-spec TPS inside the throttle body
- Damaged wiring harness or corroded connector pins at TPS
- Poor ground or 5V reference to TPS
- Throttle plate sticking or binding due to carbon build-up
- Faulty APP sensor causing disagreement between pedal and throttle position
Fault status
Status
Throttle Position Higher Than Expected — TPS signal indicates throttle is more open than expected for current inputs/conditions. Check sensor, wiring, and throttle body for fault.
Repair difficulty: Medium
Diagnostic time: 1.0 to 3.0 hours
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Code
P1122
MAZDA
P — Powertrain
Throttle Position Stuck Closed
Views:
UK: 25
EN: 43
RU: 28
AI status
Completed
Completed
100%
Causes
- Faulty throttle position sensor (TPS) or throttle body assembly
- Open, shorted or high-resistance wiring/connectors between TPS and ECM
- Poor sensor reference voltage or ground (5V reference loss or ground resistance)
- Sticking/thrott le plate or mechanical binding in throttle body
- Faulty accelerator pedal position (APP) sensor causing correlation mismatch
- Contaminated throttle body (carbon build-up) affecting throttle movement
Symptoms
- Check Engine MIL illuminated
- Reduced engine power / limp-home mode
- Erratic or high idle, surging, or hesitation on acceleration
- Delayed or unexpected throttle response
- Possible trouble starting or inconsistent idle
What to check
- Read freeze frame and related codes; note engine rpm, throttle position, vehicle speed, and accelerator pedal position at fault
- Visually inspect throttle body, TPS connector and wiring for damage, corrosion, pin push-out or water intrusion
- Verify battery voltage and good battery/ECM grounds before testing sensors
- Scan live data: compare TPS voltage/percent vs accelerator pedal position (APP) and commanded throttle
- Check for mechanical throttle binding by moving throttle plate by hand with ignition off (if service manual permits)
Signal parameters
- TPS reference: typically +5.0 V (verify on vehicle; should be stable)
- TPS output at closed throttle: commonly ~0.2–1.0 V (varies by model)
- TPS output at wide open throttle: commonly ~4.0–4.8 V
- APP sensor outputs: two redundant voltages that should correlate and scale with pedal travel
- Correlation: TPS % and APP % should track closely; large deviation or TPS higher than APP for given condition triggers P1122
- Expected smooth, monotonic voltage change with throttle movement (no sudden jumps or dropouts)
Diagnostic algorithm
- Retrieve freeze frame and all stored codes. Note operating conditions when code set.
- Perform a visual inspection of throttle body, TPS connector, wiring harness, and ECM connector for damage, corrosion, or loose pins.
- With ignition ON (engine OFF), backprobe the TPS connector: verify stable +5V reference, good ground, and measure TPS output at closed throttle. Compare to manufacturer expected values.
- Slowly open and close the throttle by hand (or have technician gently depress accelerator) while watching TPS voltage/sensor percentage on a scan tool or multimeter; look for smooth linear change without spikes or dropouts.
- Compare TPS signal to accelerator pedal position (APP) sensor data on the scan tool. Check both APP sensor channels for correlation and correct operation.
- Check wiring continuity and resistance between TPS and ECM if voltages are out of range or intermittent. Wiggle-test harness to look for intermittent faults.
- Inspect and clean throttle body if mechanical sticking or heavy carbon deposits are present; re-test after cleaning.
- If wiring, grounds and sensor signals are good but TPS remains out of range, perform recommended ECU/throttle body relearn or idle relearn procedure. Clear codes and test drive to confirm.
- If code returns and all wiring and cleaning are good, replace the throttle body assembly or TPS per service manual. After replacement perform required relearn/calibration.
- If problems persist after replacement, evaluate ECM for internal fault or update software per manufacturer service information.
Likely causes
- Failed or out-of-spec TPS inside the throttle body
- Damaged wiring harness or corroded connector pins at TPS
- Poor ground or 5V reference to TPS
- Throttle plate sticking or binding due to carbon build-up
- Faulty APP sensor causing disagreement between pedal and throttle position
Fault status
Status
Throttle Position Higher Than Expected — TPS signal indicates throttle is more open than expected for current inputs/conditions. Check sensor, wiring, and throttle body for fault.
Repair difficulty: Medium
Diagnostic time: 1.0 to 3.0 hours
Your experience will help others
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Was this AI description helpful?
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0
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Code
P1122
MERCURY
P — Powertrain
Throttle Position TP Sensor Circuit Intermittent Low Voltage
Views:
UK: 28
EN: 63
RU: 29
AI status
Completed
Completed
100%
Causes
- Faulty throttle position sensor (TPS) or throttle body assembly
- Open, shorted or high-resistance wiring/connectors between TPS and ECM
- Poor sensor reference voltage or ground (5V reference loss or ground resistance)
- Sticking/thrott le plate or mechanical binding in throttle body
- Faulty accelerator pedal position (APP) sensor causing correlation mismatch
- Contaminated throttle body (carbon build-up) affecting throttle movement
Symptoms
- Check Engine MIL illuminated
- Reduced engine power / limp-home mode
- Erratic or high idle, surging, or hesitation on acceleration
- Delayed or unexpected throttle response
- Possible trouble starting or inconsistent idle
What to check
- Read freeze frame and related codes; note engine rpm, throttle position, vehicle speed, and accelerator pedal position at fault
- Visually inspect throttle body, TPS connector and wiring for damage, corrosion, pin push-out or water intrusion
- Verify battery voltage and good battery/ECM grounds before testing sensors
- Scan live data: compare TPS voltage/percent vs accelerator pedal position (APP) and commanded throttle
- Check for mechanical throttle binding by moving throttle plate by hand with ignition off (if service manual permits)
Signal parameters
- TPS reference: typically +5.0 V (verify on vehicle; should be stable)
- TPS output at closed throttle: commonly ~0.2–1.0 V (varies by model)
- TPS output at wide open throttle: commonly ~4.0–4.8 V
- APP sensor outputs: two redundant voltages that should correlate and scale with pedal travel
- Correlation: TPS % and APP % should track closely; large deviation or TPS higher than APP for given condition triggers P1122
- Expected smooth, monotonic voltage change with throttle movement (no sudden jumps or dropouts)
Diagnostic algorithm
- Retrieve freeze frame and all stored codes. Note operating conditions when code set.
- Perform a visual inspection of throttle body, TPS connector, wiring harness, and ECM connector for damage, corrosion, or loose pins.
- With ignition ON (engine OFF), backprobe the TPS connector: verify stable +5V reference, good ground, and measure TPS output at closed throttle. Compare to manufacturer expected values.
- Slowly open and close the throttle by hand (or have technician gently depress accelerator) while watching TPS voltage/sensor percentage on a scan tool or multimeter; look for smooth linear change without spikes or dropouts.
- Compare TPS signal to accelerator pedal position (APP) sensor data on the scan tool. Check both APP sensor channels for correlation and correct operation.
- Check wiring continuity and resistance between TPS and ECM if voltages are out of range or intermittent. Wiggle-test harness to look for intermittent faults.
- Inspect and clean throttle body if mechanical sticking or heavy carbon deposits are present; re-test after cleaning.
- If wiring, grounds and sensor signals are good but TPS remains out of range, perform recommended ECU/throttle body relearn or idle relearn procedure. Clear codes and test drive to confirm.
- If code returns and all wiring and cleaning are good, replace the throttle body assembly or TPS per service manual. After replacement perform required relearn/calibration.
- If problems persist after replacement, evaluate ECM for internal fault or update software per manufacturer service information.
Likely causes
- Failed or out-of-spec TPS inside the throttle body
- Damaged wiring harness or corroded connector pins at TPS
- Poor ground or 5V reference to TPS
- Throttle plate sticking or binding due to carbon build-up
- Faulty APP sensor causing disagreement between pedal and throttle position
Fault status
Status
Throttle Position Higher Than Expected — TPS signal indicates throttle is more open than expected for current inputs/conditions. Check sensor, wiring, and throttle body for fault.
Repair difficulty: Medium
Diagnostic time: 1.0 to 3.0 hours
Your experience will help others
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Code
P1122
MINI
P — Powertrain
Accelerator pedal position (APP) sensor 1 - low input
Views:
UK: 3
EN: 5
RU: 5
AI status
Completed
Completed
100%
Causes
- Faulty throttle position sensor (TPS) or throttle body assembly
- Open, shorted or high-resistance wiring/connectors between TPS and ECM
- Poor sensor reference voltage or ground (5V reference loss or ground resistance)
- Sticking/thrott le plate or mechanical binding in throttle body
- Faulty accelerator pedal position (APP) sensor causing correlation mismatch
- Contaminated throttle body (carbon build-up) affecting throttle movement
Symptoms
- Check Engine MIL illuminated
- Reduced engine power / limp-home mode
- Erratic or high idle, surging, or hesitation on acceleration
- Delayed or unexpected throttle response
- Possible trouble starting or inconsistent idle
What to check
- Read freeze frame and related codes; note engine rpm, throttle position, vehicle speed, and accelerator pedal position at fault
- Visually inspect throttle body, TPS connector and wiring for damage, corrosion, pin push-out or water intrusion
- Verify battery voltage and good battery/ECM grounds before testing sensors
- Scan live data: compare TPS voltage/percent vs accelerator pedal position (APP) and commanded throttle
- Check for mechanical throttle binding by moving throttle plate by hand with ignition off (if service manual permits)
Signal parameters
- TPS reference: typically +5.0 V (verify on vehicle; should be stable)
- TPS output at closed throttle: commonly ~0.2–1.0 V (varies by model)
- TPS output at wide open throttle: commonly ~4.0–4.8 V
- APP sensor outputs: two redundant voltages that should correlate and scale with pedal travel
- Correlation: TPS % and APP % should track closely; large deviation or TPS higher than APP for given condition triggers P1122
- Expected smooth, monotonic voltage change with throttle movement (no sudden jumps or dropouts)
Diagnostic algorithm
- Retrieve freeze frame and all stored codes. Note operating conditions when code set.
- Perform a visual inspection of throttle body, TPS connector, wiring harness, and ECM connector for damage, corrosion, or loose pins.
- With ignition ON (engine OFF), backprobe the TPS connector: verify stable +5V reference, good ground, and measure TPS output at closed throttle. Compare to manufacturer expected values.
- Slowly open and close the throttle by hand (or have technician gently depress accelerator) while watching TPS voltage/sensor percentage on a scan tool or multimeter; look for smooth linear change without spikes or dropouts.
- Compare TPS signal to accelerator pedal position (APP) sensor data on the scan tool. Check both APP sensor channels for correlation and correct operation.
- Check wiring continuity and resistance between TPS and ECM if voltages are out of range or intermittent. Wiggle-test harness to look for intermittent faults.
- Inspect and clean throttle body if mechanical sticking or heavy carbon deposits are present; re-test after cleaning.
- If wiring, grounds and sensor signals are good but TPS remains out of range, perform recommended ECU/throttle body relearn or idle relearn procedure. Clear codes and test drive to confirm.
- If code returns and all wiring and cleaning are good, replace the throttle body assembly or TPS per service manual. After replacement perform required relearn/calibration.
- If problems persist after replacement, evaluate ECM for internal fault or update software per manufacturer service information.
Likely causes
- Failed or out-of-spec TPS inside the throttle body
- Damaged wiring harness or corroded connector pins at TPS
- Poor ground or 5V reference to TPS
- Throttle plate sticking or binding due to carbon build-up
- Faulty APP sensor causing disagreement between pedal and throttle position
Fault status
Status
Throttle Position Higher Than Expected — TPS signal indicates throttle is more open than expected for current inputs/conditions. Check sensor, wiring, and throttle body for fault.
Repair difficulty: Medium
Diagnostic time: 1.0 to 3.0 hours
Your experience will help others
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Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
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Code
P1122
MITSUBISHI
P — Powertrain
ETV connector
Views:
UK: 7
EN: 19
RU: 15
AI status
Completed
Completed
100%
Causes
- Faulty throttle position sensor (TPS) or throttle body assembly
- Open, shorted or high-resistance wiring/connectors between TPS and ECM
- Poor sensor reference voltage or ground (5V reference loss or ground resistance)
- Sticking/thrott le plate or mechanical binding in throttle body
- Faulty accelerator pedal position (APP) sensor causing correlation mismatch
- Contaminated throttle body (carbon build-up) affecting throttle movement
Symptoms
- Check Engine MIL illuminated
- Reduced engine power / limp-home mode
- Erratic or high idle, surging, or hesitation on acceleration
- Delayed or unexpected throttle response
- Possible trouble starting or inconsistent idle
What to check
- Read freeze frame and related codes; note engine rpm, throttle position, vehicle speed, and accelerator pedal position at fault
- Visually inspect throttle body, TPS connector and wiring for damage, corrosion, pin push-out or water intrusion
- Verify battery voltage and good battery/ECM grounds before testing sensors
- Scan live data: compare TPS voltage/percent vs accelerator pedal position (APP) and commanded throttle
- Check for mechanical throttle binding by moving throttle plate by hand with ignition off (if service manual permits)
Signal parameters
- TPS reference: typically +5.0 V (verify on vehicle; should be stable)
- TPS output at closed throttle: commonly ~0.2–1.0 V (varies by model)
- TPS output at wide open throttle: commonly ~4.0–4.8 V
- APP sensor outputs: two redundant voltages that should correlate and scale with pedal travel
- Correlation: TPS % and APP % should track closely; large deviation or TPS higher than APP for given condition triggers P1122
- Expected smooth, monotonic voltage change with throttle movement (no sudden jumps or dropouts)
Diagnostic algorithm
- Retrieve freeze frame and all stored codes. Note operating conditions when code set.
- Perform a visual inspection of throttle body, TPS connector, wiring harness, and ECM connector for damage, corrosion, or loose pins.
- With ignition ON (engine OFF), backprobe the TPS connector: verify stable +5V reference, good ground, and measure TPS output at closed throttle. Compare to manufacturer expected values.
- Slowly open and close the throttle by hand (or have technician gently depress accelerator) while watching TPS voltage/sensor percentage on a scan tool or multimeter; look for smooth linear change without spikes or dropouts.
- Compare TPS signal to accelerator pedal position (APP) sensor data on the scan tool. Check both APP sensor channels for correlation and correct operation.
- Check wiring continuity and resistance between TPS and ECM if voltages are out of range or intermittent. Wiggle-test harness to look for intermittent faults.
- Inspect and clean throttle body if mechanical sticking or heavy carbon deposits are present; re-test after cleaning.
- If wiring, grounds and sensor signals are good but TPS remains out of range, perform recommended ECU/throttle body relearn or idle relearn procedure. Clear codes and test drive to confirm.
- If code returns and all wiring and cleaning are good, replace the throttle body assembly or TPS per service manual. After replacement perform required relearn/calibration.
- If problems persist after replacement, evaluate ECM for internal fault or update software per manufacturer service information.
Likely causes
- Failed or out-of-spec TPS inside the throttle body
- Damaged wiring harness or corroded connector pins at TPS
- Poor ground or 5V reference to TPS
- Throttle plate sticking or binding due to carbon build-up
- Faulty APP sensor causing disagreement between pedal and throttle position
Fault status
Status
Throttle Position Higher Than Expected — TPS signal indicates throttle is more open than expected for current inputs/conditions. Check sensor, wiring, and throttle body for fault.
Repair difficulty: Medium
Diagnostic time: 1.0 to 3.0 hours
Your experience will help others
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Was this AI description helpful?
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👍 Like
0
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0
Send to email
Code
P1122
OLDSMOBILE
P — Powertrain
TP Sensor Circuit Intermittent Low Voltage
Views:
UK: 24
EN: 43
RU: 31
AI status
Completed
Completed
100%
Causes
- Faulty throttle position sensor (TPS) or throttle body assembly
- Open, shorted or high-resistance wiring/connectors between TPS and ECM
- Poor sensor reference voltage or ground (5V reference loss or ground resistance)
- Sticking/thrott le plate or mechanical binding in throttle body
- Faulty accelerator pedal position (APP) sensor causing correlation mismatch
- Contaminated throttle body (carbon build-up) affecting throttle movement
Symptoms
- Check Engine MIL illuminated
- Reduced engine power / limp-home mode
- Erratic or high idle, surging, or hesitation on acceleration
- Delayed or unexpected throttle response
- Possible trouble starting or inconsistent idle
What to check
- Read freeze frame and related codes; note engine rpm, throttle position, vehicle speed, and accelerator pedal position at fault
- Visually inspect throttle body, TPS connector and wiring for damage, corrosion, pin push-out or water intrusion
- Verify battery voltage and good battery/ECM grounds before testing sensors
- Scan live data: compare TPS voltage/percent vs accelerator pedal position (APP) and commanded throttle
- Check for mechanical throttle binding by moving throttle plate by hand with ignition off (if service manual permits)
Signal parameters
- TPS reference: typically +5.0 V (verify on vehicle; should be stable)
- TPS output at closed throttle: commonly ~0.2–1.0 V (varies by model)
- TPS output at wide open throttle: commonly ~4.0–4.8 V
- APP sensor outputs: two redundant voltages that should correlate and scale with pedal travel
- Correlation: TPS % and APP % should track closely; large deviation or TPS higher than APP for given condition triggers P1122
- Expected smooth, monotonic voltage change with throttle movement (no sudden jumps or dropouts)
Diagnostic algorithm
- Retrieve freeze frame and all stored codes. Note operating conditions when code set.
- Perform a visual inspection of throttle body, TPS connector, wiring harness, and ECM connector for damage, corrosion, or loose pins.
- With ignition ON (engine OFF), backprobe the TPS connector: verify stable +5V reference, good ground, and measure TPS output at closed throttle. Compare to manufacturer expected values.
- Slowly open and close the throttle by hand (or have technician gently depress accelerator) while watching TPS voltage/sensor percentage on a scan tool or multimeter; look for smooth linear change without spikes or dropouts.
- Compare TPS signal to accelerator pedal position (APP) sensor data on the scan tool. Check both APP sensor channels for correlation and correct operation.
- Check wiring continuity and resistance between TPS and ECM if voltages are out of range or intermittent. Wiggle-test harness to look for intermittent faults.
- Inspect and clean throttle body if mechanical sticking or heavy carbon deposits are present; re-test after cleaning.
- If wiring, grounds and sensor signals are good but TPS remains out of range, perform recommended ECU/throttle body relearn or idle relearn procedure. Clear codes and test drive to confirm.
- If code returns and all wiring and cleaning are good, replace the throttle body assembly or TPS per service manual. After replacement perform required relearn/calibration.
- If problems persist after replacement, evaluate ECM for internal fault or update software per manufacturer service information.
Likely causes
- Failed or out-of-spec TPS inside the throttle body
- Damaged wiring harness or corroded connector pins at TPS
- Poor ground or 5V reference to TPS
- Throttle plate sticking or binding due to carbon build-up
- Faulty APP sensor causing disagreement between pedal and throttle position
Fault status
Status
Throttle Position Higher Than Expected — TPS signal indicates throttle is more open than expected for current inputs/conditions. Check sensor, wiring, and throttle body for fault.
Repair difficulty: Medium
Diagnostic time: 1.0 to 3.0 hours
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Code
P1122
Other
P — Powertrain
Throttle Position (TP) Sensor Circuit Intermittent Low Voltage
Views:
UK: 27
EN: 41
RU: 31
AI status
Completed
Completed
100%
Causes
- Faulty throttle position sensor (TPS) or throttle body assembly
- Open, shorted or high-resistance wiring/connectors between TPS and ECM
- Poor sensor reference voltage or ground (5V reference loss or ground resistance)
- Sticking/thrott le plate or mechanical binding in throttle body
- Faulty accelerator pedal position (APP) sensor causing correlation mismatch
- Contaminated throttle body (carbon build-up) affecting throttle movement
Symptoms
- Check Engine MIL illuminated
- Reduced engine power / limp-home mode
- Erratic or high idle, surging, or hesitation on acceleration
- Delayed or unexpected throttle response
- Possible trouble starting or inconsistent idle
What to check
- Read freeze frame and related codes; note engine rpm, throttle position, vehicle speed, and accelerator pedal position at fault
- Visually inspect throttle body, TPS connector and wiring for damage, corrosion, pin push-out or water intrusion
- Verify battery voltage and good battery/ECM grounds before testing sensors
- Scan live data: compare TPS voltage/percent vs accelerator pedal position (APP) and commanded throttle
- Check for mechanical throttle binding by moving throttle plate by hand with ignition off (if service manual permits)
Signal parameters
- TPS reference: typically +5.0 V (verify on vehicle; should be stable)
- TPS output at closed throttle: commonly ~0.2–1.0 V (varies by model)
- TPS output at wide open throttle: commonly ~4.0–4.8 V
- APP sensor outputs: two redundant voltages that should correlate and scale with pedal travel
- Correlation: TPS % and APP % should track closely; large deviation or TPS higher than APP for given condition triggers P1122
- Expected smooth, monotonic voltage change with throttle movement (no sudden jumps or dropouts)
Diagnostic algorithm
- Retrieve freeze frame and all stored codes. Note operating conditions when code set.
- Perform a visual inspection of throttle body, TPS connector, wiring harness, and ECM connector for damage, corrosion, or loose pins.
- With ignition ON (engine OFF), backprobe the TPS connector: verify stable +5V reference, good ground, and measure TPS output at closed throttle. Compare to manufacturer expected values.
- Slowly open and close the throttle by hand (or have technician gently depress accelerator) while watching TPS voltage/sensor percentage on a scan tool or multimeter; look for smooth linear change without spikes or dropouts.
- Compare TPS signal to accelerator pedal position (APP) sensor data on the scan tool. Check both APP sensor channels for correlation and correct operation.
- Check wiring continuity and resistance between TPS and ECM if voltages are out of range or intermittent. Wiggle-test harness to look for intermittent faults.
- Inspect and clean throttle body if mechanical sticking or heavy carbon deposits are present; re-test after cleaning.
- If wiring, grounds and sensor signals are good but TPS remains out of range, perform recommended ECU/throttle body relearn or idle relearn procedure. Clear codes and test drive to confirm.
- If code returns and all wiring and cleaning are good, replace the throttle body assembly or TPS per service manual. After replacement perform required relearn/calibration.
- If problems persist after replacement, evaluate ECM for internal fault or update software per manufacturer service information.
Likely causes
- Failed or out-of-spec TPS inside the throttle body
- Damaged wiring harness or corroded connector pins at TPS
- Poor ground or 5V reference to TPS
- Throttle plate sticking or binding due to carbon build-up
- Faulty APP sensor causing disagreement between pedal and throttle position
Fault status
Status
Throttle Position Higher Than Expected — TPS signal indicates throttle is more open than expected for current inputs/conditions. Check sensor, wiring, and throttle body for fault.
Repair difficulty: Medium
Diagnostic time: 1.0 to 3.0 hours
Workshop Manuals
Available brands with manuals
2
AUDI 11
6-speed manual gearbox 0B1, front-wheel drive — Workshop Manual (Edition 05.2014)
Workshop Manual199,00 UAH
Audi A3 (1997) – 1.6L 4-cylinder (2‑valve) Engine Mechanical Components Service Manual (AEH, AKL, APF) – Edition 07.2002
Workshop Manual199,00 UAH
AUDI A3 (2004) Workshop Manual — 2.0L FSI Turbo (4‑cyl, 4‑valve) Engine, Mechanics — Edition 03.2017
Workshop Manual199,00 UAH
Audi A3 2004 — Electrical System (Workshop Manual, Edition 02.2018)
Workshop Manual199,00 UAH
Audi A4 / A4 Cabriolet – 4.2 l V8 (5‑valve, timing chains) – Workshop Manual (Mechanics) – Edition 04.2007
Workshop Manual199,00 UAH
Audi A4 / A4 Cabriolet — Auxiliary Heater Workshop Manual (Edition 08.2004)
Workshop Manual199,00 UAH
Audi A4 / A4 Cabriolet (1.8T 4‑cyl turbo) — Motronic Injection & Ignition System Service Manual (Edition 01.2015)
Workshop Manual199,00 UAH
Audi A8 (2003) — Electrical System Workshop Manual (Edition 08.2014)
Workshop Manual199,00 UAH
Audi Q4 e-tron (Type F4) - Self-study Programme SSP 685
Workshop Manual199,00 UAH
Audi Q8 (2018) — Electrical System Workshop Manual (Edition 05.2019)
Workshop Manual199,00 UAH
Audi Servicing Manual — 7‑Speed Dual Clutch Transmission 0CJ / 0CL / 0CK / 0DN / 0DP / 0HL (Edition 05.2018)
Workshop Manual199,00 UAH
LAND ROVER 3
Land Rover Defender 300Tdi — Workshop Manual (1996 model year)
Workshop Manual199,00 UAH
Land Rover Defender Workshop Manual Supplement & Body Repair Manual (1999 & 2002 MY)
Workshop Manual199,00 UAH
Land Rover Range Rover — Electrical Library (LRL 0453ENG, 2002)
Workshop Manual199,00 UAH
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Code
P1122
SATURN
P — Powertrain
TP Sensor Circuit Intermittent Low Voltage
Views:
UK: 23
EN: 47
RU: 29
AI status
Completed
Completed
100%
Causes
- Faulty throttle position sensor (TPS) or throttle body assembly
- Open, shorted or high-resistance wiring/connectors between TPS and ECM
- Poor sensor reference voltage or ground (5V reference loss or ground resistance)
- Sticking/thrott le plate or mechanical binding in throttle body
- Faulty accelerator pedal position (APP) sensor causing correlation mismatch
- Contaminated throttle body (carbon build-up) affecting throttle movement
Symptoms
- Check Engine MIL illuminated
- Reduced engine power / limp-home mode
- Erratic or high idle, surging, or hesitation on acceleration
- Delayed or unexpected throttle response
- Possible trouble starting or inconsistent idle
What to check
- Read freeze frame and related codes; note engine rpm, throttle position, vehicle speed, and accelerator pedal position at fault
- Visually inspect throttle body, TPS connector and wiring for damage, corrosion, pin push-out or water intrusion
- Verify battery voltage and good battery/ECM grounds before testing sensors
- Scan live data: compare TPS voltage/percent vs accelerator pedal position (APP) and commanded throttle
- Check for mechanical throttle binding by moving throttle plate by hand with ignition off (if service manual permits)
Signal parameters
- TPS reference: typically +5.0 V (verify on vehicle; should be stable)
- TPS output at closed throttle: commonly ~0.2–1.0 V (varies by model)
- TPS output at wide open throttle: commonly ~4.0–4.8 V
- APP sensor outputs: two redundant voltages that should correlate and scale with pedal travel
- Correlation: TPS % and APP % should track closely; large deviation or TPS higher than APP for given condition triggers P1122
- Expected smooth, monotonic voltage change with throttle movement (no sudden jumps or dropouts)
Diagnostic algorithm
- Retrieve freeze frame and all stored codes. Note operating conditions when code set.
- Perform a visual inspection of throttle body, TPS connector, wiring harness, and ECM connector for damage, corrosion, or loose pins.
- With ignition ON (engine OFF), backprobe the TPS connector: verify stable +5V reference, good ground, and measure TPS output at closed throttle. Compare to manufacturer expected values.
- Slowly open and close the throttle by hand (or have technician gently depress accelerator) while watching TPS voltage/sensor percentage on a scan tool or multimeter; look for smooth linear change without spikes or dropouts.
- Compare TPS signal to accelerator pedal position (APP) sensor data on the scan tool. Check both APP sensor channels for correlation and correct operation.
- Check wiring continuity and resistance between TPS and ECM if voltages are out of range or intermittent. Wiggle-test harness to look for intermittent faults.
- Inspect and clean throttle body if mechanical sticking or heavy carbon deposits are present; re-test after cleaning.
- If wiring, grounds and sensor signals are good but TPS remains out of range, perform recommended ECU/throttle body relearn or idle relearn procedure. Clear codes and test drive to confirm.
- If code returns and all wiring and cleaning are good, replace the throttle body assembly or TPS per service manual. After replacement perform required relearn/calibration.
- If problems persist after replacement, evaluate ECM for internal fault or update software per manufacturer service information.
Likely causes
- Failed or out-of-spec TPS inside the throttle body
- Damaged wiring harness or corroded connector pins at TPS
- Poor ground or 5V reference to TPS
- Throttle plate sticking or binding due to carbon build-up
- Faulty APP sensor causing disagreement between pedal and throttle position
Fault status
Status
Throttle Position Higher Than Expected — TPS signal indicates throttle is more open than expected for current inputs/conditions. Check sensor, wiring, and throttle body for fault.
Repair difficulty: Medium
Diagnostic time: 1.0 to 3.0 hours
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
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0
Send to email
Code
P1122
SUBARU
P — Powertrain
Pressure Sources Switching Valve Circuit High Input
Views:
UK: 21
EN: 41
RU: 28
AI status
Completed
Completed
100%
Causes
- Faulty throttle position sensor (TPS) or throttle body assembly
- Open, shorted or high-resistance wiring/connectors between TPS and ECM
- Poor sensor reference voltage or ground (5V reference loss or ground resistance)
- Sticking/thrott le plate or mechanical binding in throttle body
- Faulty accelerator pedal position (APP) sensor causing correlation mismatch
- Contaminated throttle body (carbon build-up) affecting throttle movement
Symptoms
- Check Engine MIL illuminated
- Reduced engine power / limp-home mode
- Erratic or high idle, surging, or hesitation on acceleration
- Delayed or unexpected throttle response
- Possible trouble starting or inconsistent idle
What to check
- Read freeze frame and related codes; note engine rpm, throttle position, vehicle speed, and accelerator pedal position at fault
- Visually inspect throttle body, TPS connector and wiring for damage, corrosion, pin push-out or water intrusion
- Verify battery voltage and good battery/ECM grounds before testing sensors
- Scan live data: compare TPS voltage/percent vs accelerator pedal position (APP) and commanded throttle
- Check for mechanical throttle binding by moving throttle plate by hand with ignition off (if service manual permits)
Signal parameters
- TPS reference: typically +5.0 V (verify on vehicle; should be stable)
- TPS output at closed throttle: commonly ~0.2–1.0 V (varies by model)
- TPS output at wide open throttle: commonly ~4.0–4.8 V
- APP sensor outputs: two redundant voltages that should correlate and scale with pedal travel
- Correlation: TPS % and APP % should track closely; large deviation or TPS higher than APP for given condition triggers P1122
- Expected smooth, monotonic voltage change with throttle movement (no sudden jumps or dropouts)
Diagnostic algorithm
- Retrieve freeze frame and all stored codes. Note operating conditions when code set.
- Perform a visual inspection of throttle body, TPS connector, wiring harness, and ECM connector for damage, corrosion, or loose pins.
- With ignition ON (engine OFF), backprobe the TPS connector: verify stable +5V reference, good ground, and measure TPS output at closed throttle. Compare to manufacturer expected values.
- Slowly open and close the throttle by hand (or have technician gently depress accelerator) while watching TPS voltage/sensor percentage on a scan tool or multimeter; look for smooth linear change without spikes or dropouts.
- Compare TPS signal to accelerator pedal position (APP) sensor data on the scan tool. Check both APP sensor channels for correlation and correct operation.
- Check wiring continuity and resistance between TPS and ECM if voltages are out of range or intermittent. Wiggle-test harness to look for intermittent faults.
- Inspect and clean throttle body if mechanical sticking or heavy carbon deposits are present; re-test after cleaning.
- If wiring, grounds and sensor signals are good but TPS remains out of range, perform recommended ECU/throttle body relearn or idle relearn procedure. Clear codes and test drive to confirm.
- If code returns and all wiring and cleaning are good, replace the throttle body assembly or TPS per service manual. After replacement perform required relearn/calibration.
- If problems persist after replacement, evaluate ECM for internal fault or update software per manufacturer service information.
Likely causes
- Failed or out-of-spec TPS inside the throttle body
- Damaged wiring harness or corroded connector pins at TPS
- Poor ground or 5V reference to TPS
- Throttle plate sticking or binding due to carbon build-up
- Faulty APP sensor causing disagreement between pedal and throttle position
Fault status
Status
Throttle Position Higher Than Expected — TPS signal indicates throttle is more open than expected for current inputs/conditions. Check sensor, wiring, and throttle body for fault.
Repair difficulty: Medium
Diagnostic time: 1.0 to 3.0 hours
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
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0
Send to email
Code
P1122
VOLKSWAGEN
P — Powertrain
Oxygen Sensor Heater Circuit Bank 2 Sensor 2 Open
Views:
UK: 25
EN: 53
RU: 33
AI status
Completed
Completed
100%
Causes
- Faulty throttle position sensor (TPS) or throttle body assembly
- Open, shorted or high-resistance wiring/connectors between TPS and ECM
- Poor sensor reference voltage or ground (5V reference loss or ground resistance)
- Sticking/thrott le plate or mechanical binding in throttle body
- Faulty accelerator pedal position (APP) sensor causing correlation mismatch
- Contaminated throttle body (carbon build-up) affecting throttle movement
Symptoms
- Check Engine MIL illuminated
- Reduced engine power / limp-home mode
- Erratic or high idle, surging, or hesitation on acceleration
- Delayed or unexpected throttle response
- Possible trouble starting or inconsistent idle
What to check
- Read freeze frame and related codes; note engine rpm, throttle position, vehicle speed, and accelerator pedal position at fault
- Visually inspect throttle body, TPS connector and wiring for damage, corrosion, pin push-out or water intrusion
- Verify battery voltage and good battery/ECM grounds before testing sensors
- Scan live data: compare TPS voltage/percent vs accelerator pedal position (APP) and commanded throttle
- Check for mechanical throttle binding by moving throttle plate by hand with ignition off (if service manual permits)
Signal parameters
- TPS reference: typically +5.0 V (verify on vehicle; should be stable)
- TPS output at closed throttle: commonly ~0.2–1.0 V (varies by model)
- TPS output at wide open throttle: commonly ~4.0–4.8 V
- APP sensor outputs: two redundant voltages that should correlate and scale with pedal travel
- Correlation: TPS % and APP % should track closely; large deviation or TPS higher than APP for given condition triggers P1122
- Expected smooth, monotonic voltage change with throttle movement (no sudden jumps or dropouts)
Diagnostic algorithm
- Retrieve freeze frame and all stored codes. Note operating conditions when code set.
- Perform a visual inspection of throttle body, TPS connector, wiring harness, and ECM connector for damage, corrosion, or loose pins.
- With ignition ON (engine OFF), backprobe the TPS connector: verify stable +5V reference, good ground, and measure TPS output at closed throttle. Compare to manufacturer expected values.
- Slowly open and close the throttle by hand (or have technician gently depress accelerator) while watching TPS voltage/sensor percentage on a scan tool or multimeter; look for smooth linear change without spikes or dropouts.
- Compare TPS signal to accelerator pedal position (APP) sensor data on the scan tool. Check both APP sensor channels for correlation and correct operation.
- Check wiring continuity and resistance between TPS and ECM if voltages are out of range or intermittent. Wiggle-test harness to look for intermittent faults.
- Inspect and clean throttle body if mechanical sticking or heavy carbon deposits are present; re-test after cleaning.
- If wiring, grounds and sensor signals are good but TPS remains out of range, perform recommended ECU/throttle body relearn or idle relearn procedure. Clear codes and test drive to confirm.
- If code returns and all wiring and cleaning are good, replace the throttle body assembly or TPS per service manual. After replacement perform required relearn/calibration.
- If problems persist after replacement, evaluate ECM for internal fault or update software per manufacturer service information.
Likely causes
- Failed or out-of-spec TPS inside the throttle body
- Damaged wiring harness or corroded connector pins at TPS
- Poor ground or 5V reference to TPS
- Throttle plate sticking or binding due to carbon build-up
- Faulty APP sensor causing disagreement between pedal and throttle position
Fault status
Status
Throttle Position Higher Than Expected — TPS signal indicates throttle is more open than expected for current inputs/conditions. Check sensor, wiring, and throttle body for fault.
Repair difficulty: Medium
Diagnostic time: 1.0 to 3.0 hours
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email