Code
P1220
ALFA ROMEO
P — Powertrain
Throttle position [signal implausible]
Views:
UK: 2
EN: 2
RU: 2
AI status
Completed
Completed
100%
Causes
- Faulty throttle position sensor (TPS) or throttle body position sensor
- Open/shorted wiring between TPS and ECU (including damaged insulation, corroded pins)
- Poor ground or 5V reference supply to the sensor
- Contaminated or mechanically sticking throttle plate/throttle body
- Faulty throttle actuator motor or internal throttle body electronics
- Intermittent connector contact (water, corrosion, bent pins)
Symptoms
- Check Engine Light (MIL) illuminated
- Reduced engine power / limp-home mode
- Erratic or high/low idle speed
- Poor throttle response, hesitation or surging
- Intermittent stall at idle or when slowing down
- Possible inability to accelerate normally
What to check
- Read stored DTCs and freeze-frame data with a capable scan tool
- Check for related codes (pedal position, throttle actuator, CAN/communication faults)
- Observe live TPS/throttle angle sensor PIDs while slowly opening/closing throttle and pressing pedal
- Visually inspect throttle body, sensor connectors and wiring for corrosion, damage or contamination
- Check battery voltage and engine ground integrity (low voltage can corrupt sensor readings)
- Perform wiggle test on wiring/connectors while observing live data for intermittent changes
Signal parameters
- Sensor reference voltage: ~5.0 V (should be stable within ±0.1 V)
- Sensor ground: close to 0 V with good continuity to chassis ground
- TPS signal voltage: ~0.5 V at closed throttle up to ~4.5 V at wide-open (exact range varies by model)
- If dual-channel TPS: two sensor outputs should ramp smoothly and correlate with each other (no sudden divergence)
- Throttle angle PID should change smoothly and proportionally to physical throttle opening/pedal position
Diagnostic algorithm
- Connect a full-function scan tool and record freeze-frame and live data for TPS/throttle angle and accelerator pedal sensors
- Check battery voltage and charging system; low voltage can produce erroneous readings
- Visually inspect throttle body, TPS connector and wiring for corrosion, water ingress, broken pins, chafing or rodent damage
- Back-probe the TPS connector: verify stable 5 V reference, ground continuity and signal voltage while slowly moving throttle; note any glitches or drops
- Compare both TPS channels (if present) or compare TPS signal vs accelerator pedal position PID — they should correlate smoothly; if not, suspect sensor/harness
- Perform continuity/resistance checks from TPS connector to ECU connector to detect open or short circuits; check for shorts to ground or 12 V
- If wiring and power/ground are correct but signal is erratic, remove and inspect sensor/throttle body for contamination or mechanical binding; clean or replace as required
- If throttle body is drive-by-wire, check throttle actuator motor/current PIDs where available; perform throttle body relearn/calibration procedure per manufacturer after repairs
- If all hardware checks pass, check for ECU software updates/TB calibration bulletin; consider ECU diagnostic or replacement only after eliminating harness/sensor/body faults
- After repairs, clear codes and verify proper operation on road and with live data; confirm code does not return
Likely causes
- Damaged/contaminated throttle position sensor or throttle body
- Wiring harness connector corrosion or broken wire at the harness/connector
- Loss of 5V reference or bad ground to the sensor
- Throttle body mechanical binding or buildup causing incorrect position feedback
Fault status
Status
Throttle position signal implausible — control module detected inconsistent or out-of-range throttle position input.
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
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Code
P1220
BUICK
P — Powertrain
Throttle Position (TP) Sensor 2 Circuit
Views:
UK: 23
EN: 21
RU: 25
AI status
Completed
Completed
100%
Causes
- Faulty throttle position sensor (TPS) or throttle body position sensor
- Open/shorted wiring between TPS and ECU (including damaged insulation, corroded pins)
- Poor ground or 5V reference supply to the sensor
- Contaminated or mechanically sticking throttle plate/throttle body
- Faulty throttle actuator motor or internal throttle body electronics
- Intermittent connector contact (water, corrosion, bent pins)
Symptoms
- Check Engine Light (MIL) illuminated
- Reduced engine power / limp-home mode
- Erratic or high/low idle speed
- Poor throttle response, hesitation or surging
- Intermittent stall at idle or when slowing down
- Possible inability to accelerate normally
What to check
- Read stored DTCs and freeze-frame data with a capable scan tool
- Check for related codes (pedal position, throttle actuator, CAN/communication faults)
- Observe live TPS/throttle angle sensor PIDs while slowly opening/closing throttle and pressing pedal
- Visually inspect throttle body, sensor connectors and wiring for corrosion, damage or contamination
- Check battery voltage and engine ground integrity (low voltage can corrupt sensor readings)
- Perform wiggle test on wiring/connectors while observing live data for intermittent changes
Signal parameters
- Sensor reference voltage: ~5.0 V (should be stable within ±0.1 V)
- Sensor ground: close to 0 V with good continuity to chassis ground
- TPS signal voltage: ~0.5 V at closed throttle up to ~4.5 V at wide-open (exact range varies by model)
- If dual-channel TPS: two sensor outputs should ramp smoothly and correlate with each other (no sudden divergence)
- Throttle angle PID should change smoothly and proportionally to physical throttle opening/pedal position
Diagnostic algorithm
- Connect a full-function scan tool and record freeze-frame and live data for TPS/throttle angle and accelerator pedal sensors
- Check battery voltage and charging system; low voltage can produce erroneous readings
- Visually inspect throttle body, TPS connector and wiring for corrosion, water ingress, broken pins, chafing or rodent damage
- Back-probe the TPS connector: verify stable 5 V reference, ground continuity and signal voltage while slowly moving throttle; note any glitches or drops
- Compare both TPS channels (if present) or compare TPS signal vs accelerator pedal position PID — they should correlate smoothly; if not, suspect sensor/harness
- Perform continuity/resistance checks from TPS connector to ECU connector to detect open or short circuits; check for shorts to ground or 12 V
- If wiring and power/ground are correct but signal is erratic, remove and inspect sensor/throttle body for contamination or mechanical binding; clean or replace as required
- If throttle body is drive-by-wire, check throttle actuator motor/current PIDs where available; perform throttle body relearn/calibration procedure per manufacturer after repairs
- If all hardware checks pass, check for ECU software updates/TB calibration bulletin; consider ECU diagnostic or replacement only after eliminating harness/sensor/body faults
- After repairs, clear codes and verify proper operation on road and with live data; confirm code does not return
Likely causes
- Damaged/contaminated throttle position sensor or throttle body
- Wiring harness connector corrosion or broken wire at the harness/connector
- Loss of 5V reference or bad ground to the sensor
- Throttle body mechanical binding or buildup causing incorrect position feedback
Fault status
Status
Throttle position signal implausible — control module detected inconsistent or out-of-range throttle position input.
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
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Code
P1220
CADILLAC
P — Powertrain
Throttle Position (TP) Sensor 2 Circuit
Views:
UK: 25
EN: 22
RU: 23
AI status
Completed
Completed
100%
Causes
- Faulty throttle position sensor (TPS) or throttle body position sensor
- Open/shorted wiring between TPS and ECU (including damaged insulation, corroded pins)
- Poor ground or 5V reference supply to the sensor
- Contaminated or mechanically sticking throttle plate/throttle body
- Faulty throttle actuator motor or internal throttle body electronics
- Intermittent connector contact (water, corrosion, bent pins)
Symptoms
- Check Engine Light (MIL) illuminated
- Reduced engine power / limp-home mode
- Erratic or high/low idle speed
- Poor throttle response, hesitation or surging
- Intermittent stall at idle or when slowing down
- Possible inability to accelerate normally
What to check
- Read stored DTCs and freeze-frame data with a capable scan tool
- Check for related codes (pedal position, throttle actuator, CAN/communication faults)
- Observe live TPS/throttle angle sensor PIDs while slowly opening/closing throttle and pressing pedal
- Visually inspect throttle body, sensor connectors and wiring for corrosion, damage or contamination
- Check battery voltage and engine ground integrity (low voltage can corrupt sensor readings)
- Perform wiggle test on wiring/connectors while observing live data for intermittent changes
Signal parameters
- Sensor reference voltage: ~5.0 V (should be stable within ±0.1 V)
- Sensor ground: close to 0 V with good continuity to chassis ground
- TPS signal voltage: ~0.5 V at closed throttle up to ~4.5 V at wide-open (exact range varies by model)
- If dual-channel TPS: two sensor outputs should ramp smoothly and correlate with each other (no sudden divergence)
- Throttle angle PID should change smoothly and proportionally to physical throttle opening/pedal position
Diagnostic algorithm
- Connect a full-function scan tool and record freeze-frame and live data for TPS/throttle angle and accelerator pedal sensors
- Check battery voltage and charging system; low voltage can produce erroneous readings
- Visually inspect throttle body, TPS connector and wiring for corrosion, water ingress, broken pins, chafing or rodent damage
- Back-probe the TPS connector: verify stable 5 V reference, ground continuity and signal voltage while slowly moving throttle; note any glitches or drops
- Compare both TPS channels (if present) or compare TPS signal vs accelerator pedal position PID — they should correlate smoothly; if not, suspect sensor/harness
- Perform continuity/resistance checks from TPS connector to ECU connector to detect open or short circuits; check for shorts to ground or 12 V
- If wiring and power/ground are correct but signal is erratic, remove and inspect sensor/throttle body for contamination or mechanical binding; clean or replace as required
- If throttle body is drive-by-wire, check throttle actuator motor/current PIDs where available; perform throttle body relearn/calibration procedure per manufacturer after repairs
- If all hardware checks pass, check for ECU software updates/TB calibration bulletin; consider ECU diagnostic or replacement only after eliminating harness/sensor/body faults
- After repairs, clear codes and verify proper operation on road and with live data; confirm code does not return
Likely causes
- Damaged/contaminated throttle position sensor or throttle body
- Wiring harness connector corrosion or broken wire at the harness/connector
- Loss of 5V reference or bad ground to the sensor
- Throttle body mechanical binding or buildup causing incorrect position feedback
Fault status
Status
Throttle position signal implausible — control module detected inconsistent or out-of-range throttle position input.
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
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Code
P1220
CHEVROLET
P — Powertrain
Throttle Position (TP) Sensor 2 Circuit
Views:
UK: 24
EN: 24
RU: 27
AI status
Completed
Completed
100%
Causes
- Faulty throttle position sensor (TPS) or throttle body position sensor
- Open/shorted wiring between TPS and ECU (including damaged insulation, corroded pins)
- Poor ground or 5V reference supply to the sensor
- Contaminated or mechanically sticking throttle plate/throttle body
- Faulty throttle actuator motor or internal throttle body electronics
- Intermittent connector contact (water, corrosion, bent pins)
Symptoms
- Check Engine Light (MIL) illuminated
- Reduced engine power / limp-home mode
- Erratic or high/low idle speed
- Poor throttle response, hesitation or surging
- Intermittent stall at idle or when slowing down
- Possible inability to accelerate normally
What to check
- Read stored DTCs and freeze-frame data with a capable scan tool
- Check for related codes (pedal position, throttle actuator, CAN/communication faults)
- Observe live TPS/throttle angle sensor PIDs while slowly opening/closing throttle and pressing pedal
- Visually inspect throttle body, sensor connectors and wiring for corrosion, damage or contamination
- Check battery voltage and engine ground integrity (low voltage can corrupt sensor readings)
- Perform wiggle test on wiring/connectors while observing live data for intermittent changes
Signal parameters
- Sensor reference voltage: ~5.0 V (should be stable within ±0.1 V)
- Sensor ground: close to 0 V with good continuity to chassis ground
- TPS signal voltage: ~0.5 V at closed throttle up to ~4.5 V at wide-open (exact range varies by model)
- If dual-channel TPS: two sensor outputs should ramp smoothly and correlate with each other (no sudden divergence)
- Throttle angle PID should change smoothly and proportionally to physical throttle opening/pedal position
Diagnostic algorithm
- Connect a full-function scan tool and record freeze-frame and live data for TPS/throttle angle and accelerator pedal sensors
- Check battery voltage and charging system; low voltage can produce erroneous readings
- Visually inspect throttle body, TPS connector and wiring for corrosion, water ingress, broken pins, chafing or rodent damage
- Back-probe the TPS connector: verify stable 5 V reference, ground continuity and signal voltage while slowly moving throttle; note any glitches or drops
- Compare both TPS channels (if present) or compare TPS signal vs accelerator pedal position PID — they should correlate smoothly; if not, suspect sensor/harness
- Perform continuity/resistance checks from TPS connector to ECU connector to detect open or short circuits; check for shorts to ground or 12 V
- If wiring and power/ground are correct but signal is erratic, remove and inspect sensor/throttle body for contamination or mechanical binding; clean or replace as required
- If throttle body is drive-by-wire, check throttle actuator motor/current PIDs where available; perform throttle body relearn/calibration procedure per manufacturer after repairs
- If all hardware checks pass, check for ECU software updates/TB calibration bulletin; consider ECU diagnostic or replacement only after eliminating harness/sensor/body faults
- After repairs, clear codes and verify proper operation on road and with live data; confirm code does not return
Likely causes
- Damaged/contaminated throttle position sensor or throttle body
- Wiring harness connector corrosion or broken wire at the harness/connector
- Loss of 5V reference or bad ground to the sensor
- Throttle body mechanical binding or buildup causing incorrect position feedback
Fault status
Status
Throttle position signal implausible — control module detected inconsistent or out-of-range throttle position input.
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
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Code
P1220
CHRYSLER
P — Powertrain
Throttle Position (TP) Sensor 2 Circuit
Views:
UK: 25
EN: 22
RU: 26
AI status
Completed
Completed
100%
Causes
- Faulty throttle position sensor (TPS) or throttle body position sensor
- Open/shorted wiring between TPS and ECU (including damaged insulation, corroded pins)
- Poor ground or 5V reference supply to the sensor
- Contaminated or mechanically sticking throttle plate/throttle body
- Faulty throttle actuator motor or internal throttle body electronics
- Intermittent connector contact (water, corrosion, bent pins)
Symptoms
- Check Engine Light (MIL) illuminated
- Reduced engine power / limp-home mode
- Erratic or high/low idle speed
- Poor throttle response, hesitation or surging
- Intermittent stall at idle or when slowing down
- Possible inability to accelerate normally
What to check
- Read stored DTCs and freeze-frame data with a capable scan tool
- Check for related codes (pedal position, throttle actuator, CAN/communication faults)
- Observe live TPS/throttle angle sensor PIDs while slowly opening/closing throttle and pressing pedal
- Visually inspect throttle body, sensor connectors and wiring for corrosion, damage or contamination
- Check battery voltage and engine ground integrity (low voltage can corrupt sensor readings)
- Perform wiggle test on wiring/connectors while observing live data for intermittent changes
Signal parameters
- Sensor reference voltage: ~5.0 V (should be stable within ±0.1 V)
- Sensor ground: close to 0 V with good continuity to chassis ground
- TPS signal voltage: ~0.5 V at closed throttle up to ~4.5 V at wide-open (exact range varies by model)
- If dual-channel TPS: two sensor outputs should ramp smoothly and correlate with each other (no sudden divergence)
- Throttle angle PID should change smoothly and proportionally to physical throttle opening/pedal position
Diagnostic algorithm
- Connect a full-function scan tool and record freeze-frame and live data for TPS/throttle angle and accelerator pedal sensors
- Check battery voltage and charging system; low voltage can produce erroneous readings
- Visually inspect throttle body, TPS connector and wiring for corrosion, water ingress, broken pins, chafing or rodent damage
- Back-probe the TPS connector: verify stable 5 V reference, ground continuity and signal voltage while slowly moving throttle; note any glitches or drops
- Compare both TPS channels (if present) or compare TPS signal vs accelerator pedal position PID — they should correlate smoothly; if not, suspect sensor/harness
- Perform continuity/resistance checks from TPS connector to ECU connector to detect open or short circuits; check for shorts to ground or 12 V
- If wiring and power/ground are correct but signal is erratic, remove and inspect sensor/throttle body for contamination or mechanical binding; clean or replace as required
- If throttle body is drive-by-wire, check throttle actuator motor/current PIDs where available; perform throttle body relearn/calibration procedure per manufacturer after repairs
- If all hardware checks pass, check for ECU software updates/TB calibration bulletin; consider ECU diagnostic or replacement only after eliminating harness/sensor/body faults
- After repairs, clear codes and verify proper operation on road and with live data; confirm code does not return
Likely causes
- Damaged/contaminated throttle position sensor or throttle body
- Wiring harness connector corrosion or broken wire at the harness/connector
- Loss of 5V reference or bad ground to the sensor
- Throttle body mechanical binding or buildup causing incorrect position feedback
Fault status
Status
Throttle position signal implausible — control module detected inconsistent or out-of-range throttle position input.
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
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Code
P1220
FIAT
P — Powertrain
Throttle position [signal implausible]
Views:
UK: 1
EN: 1
RU: 3
AI status
Completed
Completed
100%
Causes
- Faulty throttle position sensor (TPS) or throttle body position sensor
- Open/shorted wiring between TPS and ECU (including damaged insulation, corroded pins)
- Poor ground or 5V reference supply to the sensor
- Contaminated or mechanically sticking throttle plate/throttle body
- Faulty throttle actuator motor or internal throttle body electronics
- Intermittent connector contact (water, corrosion, bent pins)
Symptoms
- Check Engine Light (MIL) illuminated
- Reduced engine power / limp-home mode
- Erratic or high/low idle speed
- Poor throttle response, hesitation or surging
- Intermittent stall at idle or when slowing down
- Possible inability to accelerate normally
What to check
- Read stored DTCs and freeze-frame data with a capable scan tool
- Check for related codes (pedal position, throttle actuator, CAN/communication faults)
- Observe live TPS/throttle angle sensor PIDs while slowly opening/closing throttle and pressing pedal
- Visually inspect throttle body, sensor connectors and wiring for corrosion, damage or contamination
- Check battery voltage and engine ground integrity (low voltage can corrupt sensor readings)
- Perform wiggle test on wiring/connectors while observing live data for intermittent changes
Signal parameters
- Sensor reference voltage: ~5.0 V (should be stable within ±0.1 V)
- Sensor ground: close to 0 V with good continuity to chassis ground
- TPS signal voltage: ~0.5 V at closed throttle up to ~4.5 V at wide-open (exact range varies by model)
- If dual-channel TPS: two sensor outputs should ramp smoothly and correlate with each other (no sudden divergence)
- Throttle angle PID should change smoothly and proportionally to physical throttle opening/pedal position
Diagnostic algorithm
- Connect a full-function scan tool and record freeze-frame and live data for TPS/throttle angle and accelerator pedal sensors
- Check battery voltage and charging system; low voltage can produce erroneous readings
- Visually inspect throttle body, TPS connector and wiring for corrosion, water ingress, broken pins, chafing or rodent damage
- Back-probe the TPS connector: verify stable 5 V reference, ground continuity and signal voltage while slowly moving throttle; note any glitches or drops
- Compare both TPS channels (if present) or compare TPS signal vs accelerator pedal position PID — they should correlate smoothly; if not, suspect sensor/harness
- Perform continuity/resistance checks from TPS connector to ECU connector to detect open or short circuits; check for shorts to ground or 12 V
- If wiring and power/ground are correct but signal is erratic, remove and inspect sensor/throttle body for contamination or mechanical binding; clean or replace as required
- If throttle body is drive-by-wire, check throttle actuator motor/current PIDs where available; perform throttle body relearn/calibration procedure per manufacturer after repairs
- If all hardware checks pass, check for ECU software updates/TB calibration bulletin; consider ECU diagnostic or replacement only after eliminating harness/sensor/body faults
- After repairs, clear codes and verify proper operation on road and with live data; confirm code does not return
Likely causes
- Damaged/contaminated throttle position sensor or throttle body
- Wiring harness connector corrosion or broken wire at the harness/connector
- Loss of 5V reference or bad ground to the sensor
- Throttle body mechanical binding or buildup causing incorrect position feedback
Fault status
Status
Throttle position signal implausible — control module detected inconsistent or out-of-range throttle position input.
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
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Code
P1220
FORD
P — Powertrain
Series Throttle Control Fault
Views:
UK: 24
EN: 20
RU: 30
AI status
Completed
Completed
100%
Causes
- Faulty throttle position sensor (TPS) or throttle body position sensor
- Open/shorted wiring between TPS and ECU (including damaged insulation, corroded pins)
- Poor ground or 5V reference supply to the sensor
- Contaminated or mechanically sticking throttle plate/throttle body
- Faulty throttle actuator motor or internal throttle body electronics
- Intermittent connector contact (water, corrosion, bent pins)
Symptoms
- Check Engine Light (MIL) illuminated
- Reduced engine power / limp-home mode
- Erratic or high/low idle speed
- Poor throttle response, hesitation or surging
- Intermittent stall at idle or when slowing down
- Possible inability to accelerate normally
What to check
- Read stored DTCs and freeze-frame data with a capable scan tool
- Check for related codes (pedal position, throttle actuator, CAN/communication faults)
- Observe live TPS/throttle angle sensor PIDs while slowly opening/closing throttle and pressing pedal
- Visually inspect throttle body, sensor connectors and wiring for corrosion, damage or contamination
- Check battery voltage and engine ground integrity (low voltage can corrupt sensor readings)
- Perform wiggle test on wiring/connectors while observing live data for intermittent changes
Signal parameters
- Sensor reference voltage: ~5.0 V (should be stable within ±0.1 V)
- Sensor ground: close to 0 V with good continuity to chassis ground
- TPS signal voltage: ~0.5 V at closed throttle up to ~4.5 V at wide-open (exact range varies by model)
- If dual-channel TPS: two sensor outputs should ramp smoothly and correlate with each other (no sudden divergence)
- Throttle angle PID should change smoothly and proportionally to physical throttle opening/pedal position
Diagnostic algorithm
- Connect a full-function scan tool and record freeze-frame and live data for TPS/throttle angle and accelerator pedal sensors
- Check battery voltage and charging system; low voltage can produce erroneous readings
- Visually inspect throttle body, TPS connector and wiring for corrosion, water ingress, broken pins, chafing or rodent damage
- Back-probe the TPS connector: verify stable 5 V reference, ground continuity and signal voltage while slowly moving throttle; note any glitches or drops
- Compare both TPS channels (if present) or compare TPS signal vs accelerator pedal position PID — they should correlate smoothly; if not, suspect sensor/harness
- Perform continuity/resistance checks from TPS connector to ECU connector to detect open or short circuits; check for shorts to ground or 12 V
- If wiring and power/ground are correct but signal is erratic, remove and inspect sensor/throttle body for contamination or mechanical binding; clean or replace as required
- If throttle body is drive-by-wire, check throttle actuator motor/current PIDs where available; perform throttle body relearn/calibration procedure per manufacturer after repairs
- If all hardware checks pass, check for ECU software updates/TB calibration bulletin; consider ECU diagnostic or replacement only after eliminating harness/sensor/body faults
- After repairs, clear codes and verify proper operation on road and with live data; confirm code does not return
Likely causes
- Damaged/contaminated throttle position sensor or throttle body
- Wiring harness connector corrosion or broken wire at the harness/connector
- Loss of 5V reference or bad ground to the sensor
- Throttle body mechanical binding or buildup causing incorrect position feedback
Fault status
Status
Throttle position signal implausible — control module detected inconsistent or out-of-range throttle position input.
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
Similar codes
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Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
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Send to email
Code
P1220
GM
P — Powertrain
Throttle Position (TP) Sensor 2 Circuit
Views:
UK: 25
EN: 56
RU: 30
AI status
Completed
Completed
100%
Causes
- Faulty throttle position sensor (TPS) or throttle body position sensor
- Open/shorted wiring between TPS and ECU (including damaged insulation, corroded pins)
- Poor ground or 5V reference supply to the sensor
- Contaminated or mechanically sticking throttle plate/throttle body
- Faulty throttle actuator motor or internal throttle body electronics
- Intermittent connector contact (water, corrosion, bent pins)
Symptoms
- Check Engine Light (MIL) illuminated
- Reduced engine power / limp-home mode
- Erratic or high/low idle speed
- Poor throttle response, hesitation or surging
- Intermittent stall at idle or when slowing down
- Possible inability to accelerate normally
What to check
- Read stored DTCs and freeze-frame data with a capable scan tool
- Check for related codes (pedal position, throttle actuator, CAN/communication faults)
- Observe live TPS/throttle angle sensor PIDs while slowly opening/closing throttle and pressing pedal
- Visually inspect throttle body, sensor connectors and wiring for corrosion, damage or contamination
- Check battery voltage and engine ground integrity (low voltage can corrupt sensor readings)
- Perform wiggle test on wiring/connectors while observing live data for intermittent changes
Signal parameters
- Sensor reference voltage: ~5.0 V (should be stable within ±0.1 V)
- Sensor ground: close to 0 V with good continuity to chassis ground
- TPS signal voltage: ~0.5 V at closed throttle up to ~4.5 V at wide-open (exact range varies by model)
- If dual-channel TPS: two sensor outputs should ramp smoothly and correlate with each other (no sudden divergence)
- Throttle angle PID should change smoothly and proportionally to physical throttle opening/pedal position
Diagnostic algorithm
- Connect a full-function scan tool and record freeze-frame and live data for TPS/throttle angle and accelerator pedal sensors
- Check battery voltage and charging system; low voltage can produce erroneous readings
- Visually inspect throttle body, TPS connector and wiring for corrosion, water ingress, broken pins, chafing or rodent damage
- Back-probe the TPS connector: verify stable 5 V reference, ground continuity and signal voltage while slowly moving throttle; note any glitches or drops
- Compare both TPS channels (if present) or compare TPS signal vs accelerator pedal position PID — they should correlate smoothly; if not, suspect sensor/harness
- Perform continuity/resistance checks from TPS connector to ECU connector to detect open or short circuits; check for shorts to ground or 12 V
- If wiring and power/ground are correct but signal is erratic, remove and inspect sensor/throttle body for contamination or mechanical binding; clean or replace as required
- If throttle body is drive-by-wire, check throttle actuator motor/current PIDs where available; perform throttle body relearn/calibration procedure per manufacturer after repairs
- If all hardware checks pass, check for ECU software updates/TB calibration bulletin; consider ECU diagnostic or replacement only after eliminating harness/sensor/body faults
- After repairs, clear codes and verify proper operation on road and with live data; confirm code does not return
Likely causes
- Damaged/contaminated throttle position sensor or throttle body
- Wiring harness connector corrosion or broken wire at the harness/connector
- Loss of 5V reference or bad ground to the sensor
- Throttle body mechanical binding or buildup causing incorrect position feedback
Fault status
Status
Throttle position signal implausible — control module detected inconsistent or out-of-range throttle position input.
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
Similar codes
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Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
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Send to email
Code
P1220
GMC
P — Powertrain
Throttle Position (TP) Sensor 2 Circuit
Views:
UK: 26
EN: 23
RU: 27
AI status
Completed
Completed
100%
Causes
- Faulty throttle position sensor (TPS) or throttle body position sensor
- Open/shorted wiring between TPS and ECU (including damaged insulation, corroded pins)
- Poor ground or 5V reference supply to the sensor
- Contaminated or mechanically sticking throttle plate/throttle body
- Faulty throttle actuator motor or internal throttle body electronics
- Intermittent connector contact (water, corrosion, bent pins)
Symptoms
- Check Engine Light (MIL) illuminated
- Reduced engine power / limp-home mode
- Erratic or high/low idle speed
- Poor throttle response, hesitation or surging
- Intermittent stall at idle or when slowing down
- Possible inability to accelerate normally
What to check
- Read stored DTCs and freeze-frame data with a capable scan tool
- Check for related codes (pedal position, throttle actuator, CAN/communication faults)
- Observe live TPS/throttle angle sensor PIDs while slowly opening/closing throttle and pressing pedal
- Visually inspect throttle body, sensor connectors and wiring for corrosion, damage or contamination
- Check battery voltage and engine ground integrity (low voltage can corrupt sensor readings)
- Perform wiggle test on wiring/connectors while observing live data for intermittent changes
Signal parameters
- Sensor reference voltage: ~5.0 V (should be stable within ±0.1 V)
- Sensor ground: close to 0 V with good continuity to chassis ground
- TPS signal voltage: ~0.5 V at closed throttle up to ~4.5 V at wide-open (exact range varies by model)
- If dual-channel TPS: two sensor outputs should ramp smoothly and correlate with each other (no sudden divergence)
- Throttle angle PID should change smoothly and proportionally to physical throttle opening/pedal position
Diagnostic algorithm
- Connect a full-function scan tool and record freeze-frame and live data for TPS/throttle angle and accelerator pedal sensors
- Check battery voltage and charging system; low voltage can produce erroneous readings
- Visually inspect throttle body, TPS connector and wiring for corrosion, water ingress, broken pins, chafing or rodent damage
- Back-probe the TPS connector: verify stable 5 V reference, ground continuity and signal voltage while slowly moving throttle; note any glitches or drops
- Compare both TPS channels (if present) or compare TPS signal vs accelerator pedal position PID — they should correlate smoothly; if not, suspect sensor/harness
- Perform continuity/resistance checks from TPS connector to ECU connector to detect open or short circuits; check for shorts to ground or 12 V
- If wiring and power/ground are correct but signal is erratic, remove and inspect sensor/throttle body for contamination or mechanical binding; clean or replace as required
- If throttle body is drive-by-wire, check throttle actuator motor/current PIDs where available; perform throttle body relearn/calibration procedure per manufacturer after repairs
- If all hardware checks pass, check for ECU software updates/TB calibration bulletin; consider ECU diagnostic or replacement only after eliminating harness/sensor/body faults
- After repairs, clear codes and verify proper operation on road and with live data; confirm code does not return
Likely causes
- Damaged/contaminated throttle position sensor or throttle body
- Wiring harness connector corrosion or broken wire at the harness/connector
- Loss of 5V reference or bad ground to the sensor
- Throttle body mechanical binding or buildup causing incorrect position feedback
Fault status
Status
Throttle position signal implausible — control module detected inconsistent or out-of-range throttle position input.
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
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Code
P1220
HUMMER
P — Powertrain
Throttle Position (TP) Sensor 2 Circuit
Views:
UK: 8
EN: 15
RU: 14
AI status
Completed
Completed
100%
Causes
- Faulty throttle position sensor (TPS) or throttle body position sensor
- Open/shorted wiring between TPS and ECU (including damaged insulation, corroded pins)
- Poor ground or 5V reference supply to the sensor
- Contaminated or mechanically sticking throttle plate/throttle body
- Faulty throttle actuator motor or internal throttle body electronics
- Intermittent connector contact (water, corrosion, bent pins)
Symptoms
- Check Engine Light (MIL) illuminated
- Reduced engine power / limp-home mode
- Erratic or high/low idle speed
- Poor throttle response, hesitation or surging
- Intermittent stall at idle or when slowing down
- Possible inability to accelerate normally
What to check
- Read stored DTCs and freeze-frame data with a capable scan tool
- Check for related codes (pedal position, throttle actuator, CAN/communication faults)
- Observe live TPS/throttle angle sensor PIDs while slowly opening/closing throttle and pressing pedal
- Visually inspect throttle body, sensor connectors and wiring for corrosion, damage or contamination
- Check battery voltage and engine ground integrity (low voltage can corrupt sensor readings)
- Perform wiggle test on wiring/connectors while observing live data for intermittent changes
Signal parameters
- Sensor reference voltage: ~5.0 V (should be stable within ±0.1 V)
- Sensor ground: close to 0 V with good continuity to chassis ground
- TPS signal voltage: ~0.5 V at closed throttle up to ~4.5 V at wide-open (exact range varies by model)
- If dual-channel TPS: two sensor outputs should ramp smoothly and correlate with each other (no sudden divergence)
- Throttle angle PID should change smoothly and proportionally to physical throttle opening/pedal position
Diagnostic algorithm
- Connect a full-function scan tool and record freeze-frame and live data for TPS/throttle angle and accelerator pedal sensors
- Check battery voltage and charging system; low voltage can produce erroneous readings
- Visually inspect throttle body, TPS connector and wiring for corrosion, water ingress, broken pins, chafing or rodent damage
- Back-probe the TPS connector: verify stable 5 V reference, ground continuity and signal voltage while slowly moving throttle; note any glitches or drops
- Compare both TPS channels (if present) or compare TPS signal vs accelerator pedal position PID — they should correlate smoothly; if not, suspect sensor/harness
- Perform continuity/resistance checks from TPS connector to ECU connector to detect open or short circuits; check for shorts to ground or 12 V
- If wiring and power/ground are correct but signal is erratic, remove and inspect sensor/throttle body for contamination or mechanical binding; clean or replace as required
- If throttle body is drive-by-wire, check throttle actuator motor/current PIDs where available; perform throttle body relearn/calibration procedure per manufacturer after repairs
- If all hardware checks pass, check for ECU software updates/TB calibration bulletin; consider ECU diagnostic or replacement only after eliminating harness/sensor/body faults
- After repairs, clear codes and verify proper operation on road and with live data; confirm code does not return
Likely causes
- Damaged/contaminated throttle position sensor or throttle body
- Wiring harness connector corrosion or broken wire at the harness/connector
- Loss of 5V reference or bad ground to the sensor
- Throttle body mechanical binding or buildup causing incorrect position feedback
Fault status
Status
Throttle position signal implausible — control module detected inconsistent or out-of-range throttle position input.
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
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Code
P1220
LINCOLN
P — Powertrain
Series Throttle Control Fault
Views:
UK: 23
EN: 22
RU: 27
AI status
Completed
Completed
100%
Causes
- Faulty throttle position sensor (TPS) or throttle body position sensor
- Open/shorted wiring between TPS and ECU (including damaged insulation, corroded pins)
- Poor ground or 5V reference supply to the sensor
- Contaminated or mechanically sticking throttle plate/throttle body
- Faulty throttle actuator motor or internal throttle body electronics
- Intermittent connector contact (water, corrosion, bent pins)
Symptoms
- Check Engine Light (MIL) illuminated
- Reduced engine power / limp-home mode
- Erratic or high/low idle speed
- Poor throttle response, hesitation or surging
- Intermittent stall at idle or when slowing down
- Possible inability to accelerate normally
What to check
- Read stored DTCs and freeze-frame data with a capable scan tool
- Check for related codes (pedal position, throttle actuator, CAN/communication faults)
- Observe live TPS/throttle angle sensor PIDs while slowly opening/closing throttle and pressing pedal
- Visually inspect throttle body, sensor connectors and wiring for corrosion, damage or contamination
- Check battery voltage and engine ground integrity (low voltage can corrupt sensor readings)
- Perform wiggle test on wiring/connectors while observing live data for intermittent changes
Signal parameters
- Sensor reference voltage: ~5.0 V (should be stable within ±0.1 V)
- Sensor ground: close to 0 V with good continuity to chassis ground
- TPS signal voltage: ~0.5 V at closed throttle up to ~4.5 V at wide-open (exact range varies by model)
- If dual-channel TPS: two sensor outputs should ramp smoothly and correlate with each other (no sudden divergence)
- Throttle angle PID should change smoothly and proportionally to physical throttle opening/pedal position
Diagnostic algorithm
- Connect a full-function scan tool and record freeze-frame and live data for TPS/throttle angle and accelerator pedal sensors
- Check battery voltage and charging system; low voltage can produce erroneous readings
- Visually inspect throttle body, TPS connector and wiring for corrosion, water ingress, broken pins, chafing or rodent damage
- Back-probe the TPS connector: verify stable 5 V reference, ground continuity and signal voltage while slowly moving throttle; note any glitches or drops
- Compare both TPS channels (if present) or compare TPS signal vs accelerator pedal position PID — they should correlate smoothly; if not, suspect sensor/harness
- Perform continuity/resistance checks from TPS connector to ECU connector to detect open or short circuits; check for shorts to ground or 12 V
- If wiring and power/ground are correct but signal is erratic, remove and inspect sensor/throttle body for contamination or mechanical binding; clean or replace as required
- If throttle body is drive-by-wire, check throttle actuator motor/current PIDs where available; perform throttle body relearn/calibration procedure per manufacturer after repairs
- If all hardware checks pass, check for ECU software updates/TB calibration bulletin; consider ECU diagnostic or replacement only after eliminating harness/sensor/body faults
- After repairs, clear codes and verify proper operation on road and with live data; confirm code does not return
Likely causes
- Damaged/contaminated throttle position sensor or throttle body
- Wiring harness connector corrosion or broken wire at the harness/connector
- Loss of 5V reference or bad ground to the sensor
- Throttle body mechanical binding or buildup causing incorrect position feedback
Fault status
Status
Throttle position signal implausible — control module detected inconsistent or out-of-range throttle position input.
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
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Code
P1220
MERCEDES-BENZ
P — Powertrain
Fuel Quantity Actuator Y231
Views:
UK: 14
EN: 16
RU: 15
AI status
Completed
Completed
100%
Causes
- Faulty throttle position sensor (TPS) or throttle body position sensor
- Open/shorted wiring between TPS and ECU (including damaged insulation, corroded pins)
- Poor ground or 5V reference supply to the sensor
- Contaminated or mechanically sticking throttle plate/throttle body
- Faulty throttle actuator motor or internal throttle body electronics
- Intermittent connector contact (water, corrosion, bent pins)
Symptoms
- Check Engine Light (MIL) illuminated
- Reduced engine power / limp-home mode
- Erratic or high/low idle speed
- Poor throttle response, hesitation or surging
- Intermittent stall at idle or when slowing down
- Possible inability to accelerate normally
What to check
- Read stored DTCs and freeze-frame data with a capable scan tool
- Check for related codes (pedal position, throttle actuator, CAN/communication faults)
- Observe live TPS/throttle angle sensor PIDs while slowly opening/closing throttle and pressing pedal
- Visually inspect throttle body, sensor connectors and wiring for corrosion, damage or contamination
- Check battery voltage and engine ground integrity (low voltage can corrupt sensor readings)
- Perform wiggle test on wiring/connectors while observing live data for intermittent changes
Signal parameters
- Sensor reference voltage: ~5.0 V (should be stable within ±0.1 V)
- Sensor ground: close to 0 V with good continuity to chassis ground
- TPS signal voltage: ~0.5 V at closed throttle up to ~4.5 V at wide-open (exact range varies by model)
- If dual-channel TPS: two sensor outputs should ramp smoothly and correlate with each other (no sudden divergence)
- Throttle angle PID should change smoothly and proportionally to physical throttle opening/pedal position
Diagnostic algorithm
- Connect a full-function scan tool and record freeze-frame and live data for TPS/throttle angle and accelerator pedal sensors
- Check battery voltage and charging system; low voltage can produce erroneous readings
- Visually inspect throttle body, TPS connector and wiring for corrosion, water ingress, broken pins, chafing or rodent damage
- Back-probe the TPS connector: verify stable 5 V reference, ground continuity and signal voltage while slowly moving throttle; note any glitches or drops
- Compare both TPS channels (if present) or compare TPS signal vs accelerator pedal position PID — they should correlate smoothly; if not, suspect sensor/harness
- Perform continuity/resistance checks from TPS connector to ECU connector to detect open or short circuits; check for shorts to ground or 12 V
- If wiring and power/ground are correct but signal is erratic, remove and inspect sensor/throttle body for contamination or mechanical binding; clean or replace as required
- If throttle body is drive-by-wire, check throttle actuator motor/current PIDs where available; perform throttle body relearn/calibration procedure per manufacturer after repairs
- If all hardware checks pass, check for ECU software updates/TB calibration bulletin; consider ECU diagnostic or replacement only after eliminating harness/sensor/body faults
- After repairs, clear codes and verify proper operation on road and with live data; confirm code does not return
Likely causes
- Damaged/contaminated throttle position sensor or throttle body
- Wiring harness connector corrosion or broken wire at the harness/connector
- Loss of 5V reference or bad ground to the sensor
- Throttle body mechanical binding or buildup causing incorrect position feedback
Fault status
Status
Throttle position signal implausible — control module detected inconsistent or out-of-range throttle position input.
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
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Code
P1220
MERCURY
P — Powertrain
Series Throttle Control Fault
Views:
UK: 25
EN: 25
RU: 27
AI status
Completed
Completed
100%
Causes
- Faulty throttle position sensor (TPS) or throttle body position sensor
- Open/shorted wiring between TPS and ECU (including damaged insulation, corroded pins)
- Poor ground or 5V reference supply to the sensor
- Contaminated or mechanically sticking throttle plate/throttle body
- Faulty throttle actuator motor or internal throttle body electronics
- Intermittent connector contact (water, corrosion, bent pins)
Symptoms
- Check Engine Light (MIL) illuminated
- Reduced engine power / limp-home mode
- Erratic or high/low idle speed
- Poor throttle response, hesitation or surging
- Intermittent stall at idle or when slowing down
- Possible inability to accelerate normally
What to check
- Read stored DTCs and freeze-frame data with a capable scan tool
- Check for related codes (pedal position, throttle actuator, CAN/communication faults)
- Observe live TPS/throttle angle sensor PIDs while slowly opening/closing throttle and pressing pedal
- Visually inspect throttle body, sensor connectors and wiring for corrosion, damage or contamination
- Check battery voltage and engine ground integrity (low voltage can corrupt sensor readings)
- Perform wiggle test on wiring/connectors while observing live data for intermittent changes
Signal parameters
- Sensor reference voltage: ~5.0 V (should be stable within ±0.1 V)
- Sensor ground: close to 0 V with good continuity to chassis ground
- TPS signal voltage: ~0.5 V at closed throttle up to ~4.5 V at wide-open (exact range varies by model)
- If dual-channel TPS: two sensor outputs should ramp smoothly and correlate with each other (no sudden divergence)
- Throttle angle PID should change smoothly and proportionally to physical throttle opening/pedal position
Diagnostic algorithm
- Connect a full-function scan tool and record freeze-frame and live data for TPS/throttle angle and accelerator pedal sensors
- Check battery voltage and charging system; low voltage can produce erroneous readings
- Visually inspect throttle body, TPS connector and wiring for corrosion, water ingress, broken pins, chafing or rodent damage
- Back-probe the TPS connector: verify stable 5 V reference, ground continuity and signal voltage while slowly moving throttle; note any glitches or drops
- Compare both TPS channels (if present) or compare TPS signal vs accelerator pedal position PID — they should correlate smoothly; if not, suspect sensor/harness
- Perform continuity/resistance checks from TPS connector to ECU connector to detect open or short circuits; check for shorts to ground or 12 V
- If wiring and power/ground are correct but signal is erratic, remove and inspect sensor/throttle body for contamination or mechanical binding; clean or replace as required
- If throttle body is drive-by-wire, check throttle actuator motor/current PIDs where available; perform throttle body relearn/calibration procedure per manufacturer after repairs
- If all hardware checks pass, check for ECU software updates/TB calibration bulletin; consider ECU diagnostic or replacement only after eliminating harness/sensor/body faults
- After repairs, clear codes and verify proper operation on road and with live data; confirm code does not return
Likely causes
- Damaged/contaminated throttle position sensor or throttle body
- Wiring harness connector corrosion or broken wire at the harness/connector
- Loss of 5V reference or bad ground to the sensor
- Throttle body mechanical binding or buildup causing incorrect position feedback
Fault status
Status
Throttle position signal implausible — control module detected inconsistent or out-of-range throttle position input.
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
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Code
P1220
MITSUBISHI
P — Powertrain
ETV system
Views:
UK: 6
EN: 8
RU: 11
AI status
Completed
Completed
100%
Causes
- Faulty throttle position sensor (TPS) or throttle body position sensor
- Open/shorted wiring between TPS and ECU (including damaged insulation, corroded pins)
- Poor ground or 5V reference supply to the sensor
- Contaminated or mechanically sticking throttle plate/throttle body
- Faulty throttle actuator motor or internal throttle body electronics
- Intermittent connector contact (water, corrosion, bent pins)
Symptoms
- Check Engine Light (MIL) illuminated
- Reduced engine power / limp-home mode
- Erratic or high/low idle speed
- Poor throttle response, hesitation or surging
- Intermittent stall at idle or when slowing down
- Possible inability to accelerate normally
What to check
- Read stored DTCs and freeze-frame data with a capable scan tool
- Check for related codes (pedal position, throttle actuator, CAN/communication faults)
- Observe live TPS/throttle angle sensor PIDs while slowly opening/closing throttle and pressing pedal
- Visually inspect throttle body, sensor connectors and wiring for corrosion, damage or contamination
- Check battery voltage and engine ground integrity (low voltage can corrupt sensor readings)
- Perform wiggle test on wiring/connectors while observing live data for intermittent changes
Signal parameters
- Sensor reference voltage: ~5.0 V (should be stable within ±0.1 V)
- Sensor ground: close to 0 V with good continuity to chassis ground
- TPS signal voltage: ~0.5 V at closed throttle up to ~4.5 V at wide-open (exact range varies by model)
- If dual-channel TPS: two sensor outputs should ramp smoothly and correlate with each other (no sudden divergence)
- Throttle angle PID should change smoothly and proportionally to physical throttle opening/pedal position
Diagnostic algorithm
- Connect a full-function scan tool and record freeze-frame and live data for TPS/throttle angle and accelerator pedal sensors
- Check battery voltage and charging system; low voltage can produce erroneous readings
- Visually inspect throttle body, TPS connector and wiring for corrosion, water ingress, broken pins, chafing or rodent damage
- Back-probe the TPS connector: verify stable 5 V reference, ground continuity and signal voltage while slowly moving throttle; note any glitches or drops
- Compare both TPS channels (if present) or compare TPS signal vs accelerator pedal position PID — they should correlate smoothly; if not, suspect sensor/harness
- Perform continuity/resistance checks from TPS connector to ECU connector to detect open or short circuits; check for shorts to ground or 12 V
- If wiring and power/ground are correct but signal is erratic, remove and inspect sensor/throttle body for contamination or mechanical binding; clean or replace as required
- If throttle body is drive-by-wire, check throttle actuator motor/current PIDs where available; perform throttle body relearn/calibration procedure per manufacturer after repairs
- If all hardware checks pass, check for ECU software updates/TB calibration bulletin; consider ECU diagnostic or replacement only after eliminating harness/sensor/body faults
- After repairs, clear codes and verify proper operation on road and with live data; confirm code does not return
Likely causes
- Damaged/contaminated throttle position sensor or throttle body
- Wiring harness connector corrosion or broken wire at the harness/connector
- Loss of 5V reference or bad ground to the sensor
- Throttle body mechanical binding or buildup causing incorrect position feedback
Fault status
Status
Throttle position signal implausible — control module detected inconsistent or out-of-range throttle position input.
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
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Code
P1220
NISSAN
P — Powertrain
Fuel Pump Control Signal Fault
Views:
UK: 23
EN: 22
RU: 24
AI status
Completed
Completed
100%
Causes
- Faulty throttle position sensor (TPS) or throttle body position sensor
- Open/shorted wiring between TPS and ECU (including damaged insulation, corroded pins)
- Poor ground or 5V reference supply to the sensor
- Contaminated or mechanically sticking throttle plate/throttle body
- Faulty throttle actuator motor or internal throttle body electronics
- Intermittent connector contact (water, corrosion, bent pins)
Symptoms
- Check Engine Light (MIL) illuminated
- Reduced engine power / limp-home mode
- Erratic or high/low idle speed
- Poor throttle response, hesitation or surging
- Intermittent stall at idle or when slowing down
- Possible inability to accelerate normally
What to check
- Read stored DTCs and freeze-frame data with a capable scan tool
- Check for related codes (pedal position, throttle actuator, CAN/communication faults)
- Observe live TPS/throttle angle sensor PIDs while slowly opening/closing throttle and pressing pedal
- Visually inspect throttle body, sensor connectors and wiring for corrosion, damage or contamination
- Check battery voltage and engine ground integrity (low voltage can corrupt sensor readings)
- Perform wiggle test on wiring/connectors while observing live data for intermittent changes
Signal parameters
- Sensor reference voltage: ~5.0 V (should be stable within ±0.1 V)
- Sensor ground: close to 0 V with good continuity to chassis ground
- TPS signal voltage: ~0.5 V at closed throttle up to ~4.5 V at wide-open (exact range varies by model)
- If dual-channel TPS: two sensor outputs should ramp smoothly and correlate with each other (no sudden divergence)
- Throttle angle PID should change smoothly and proportionally to physical throttle opening/pedal position
Diagnostic algorithm
- Connect a full-function scan tool and record freeze-frame and live data for TPS/throttle angle and accelerator pedal sensors
- Check battery voltage and charging system; low voltage can produce erroneous readings
- Visually inspect throttle body, TPS connector and wiring for corrosion, water ingress, broken pins, chafing or rodent damage
- Back-probe the TPS connector: verify stable 5 V reference, ground continuity and signal voltage while slowly moving throttle; note any glitches or drops
- Compare both TPS channels (if present) or compare TPS signal vs accelerator pedal position PID — they should correlate smoothly; if not, suspect sensor/harness
- Perform continuity/resistance checks from TPS connector to ECU connector to detect open or short circuits; check for shorts to ground or 12 V
- If wiring and power/ground are correct but signal is erratic, remove and inspect sensor/throttle body for contamination or mechanical binding; clean or replace as required
- If throttle body is drive-by-wire, check throttle actuator motor/current PIDs where available; perform throttle body relearn/calibration procedure per manufacturer after repairs
- If all hardware checks pass, check for ECU software updates/TB calibration bulletin; consider ECU diagnostic or replacement only after eliminating harness/sensor/body faults
- After repairs, clear codes and verify proper operation on road and with live data; confirm code does not return
Likely causes
- Damaged/contaminated throttle position sensor or throttle body
- Wiring harness connector corrosion or broken wire at the harness/connector
- Loss of 5V reference or bad ground to the sensor
- Throttle body mechanical binding or buildup causing incorrect position feedback
Fault status
Status
Throttle position signal implausible — control module detected inconsistent or out-of-range throttle position input.
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
Similar codes
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Code
P1220
OLDSMOBILE
P — Powertrain
Throttle Position TP Sensor 2 Circuit
Views:
UK: 25
EN: 26
RU: 25
AI status
Completed
Completed
100%
Causes
- Faulty throttle position sensor (TPS) or throttle body position sensor
- Open/shorted wiring between TPS and ECU (including damaged insulation, corroded pins)
- Poor ground or 5V reference supply to the sensor
- Contaminated or mechanically sticking throttle plate/throttle body
- Faulty throttle actuator motor or internal throttle body electronics
- Intermittent connector contact (water, corrosion, bent pins)
Symptoms
- Check Engine Light (MIL) illuminated
- Reduced engine power / limp-home mode
- Erratic or high/low idle speed
- Poor throttle response, hesitation or surging
- Intermittent stall at idle or when slowing down
- Possible inability to accelerate normally
What to check
- Read stored DTCs and freeze-frame data with a capable scan tool
- Check for related codes (pedal position, throttle actuator, CAN/communication faults)
- Observe live TPS/throttle angle sensor PIDs while slowly opening/closing throttle and pressing pedal
- Visually inspect throttle body, sensor connectors and wiring for corrosion, damage or contamination
- Check battery voltage and engine ground integrity (low voltage can corrupt sensor readings)
- Perform wiggle test on wiring/connectors while observing live data for intermittent changes
Signal parameters
- Sensor reference voltage: ~5.0 V (should be stable within ±0.1 V)
- Sensor ground: close to 0 V with good continuity to chassis ground
- TPS signal voltage: ~0.5 V at closed throttle up to ~4.5 V at wide-open (exact range varies by model)
- If dual-channel TPS: two sensor outputs should ramp smoothly and correlate with each other (no sudden divergence)
- Throttle angle PID should change smoothly and proportionally to physical throttle opening/pedal position
Diagnostic algorithm
- Connect a full-function scan tool and record freeze-frame and live data for TPS/throttle angle and accelerator pedal sensors
- Check battery voltage and charging system; low voltage can produce erroneous readings
- Visually inspect throttle body, TPS connector and wiring for corrosion, water ingress, broken pins, chafing or rodent damage
- Back-probe the TPS connector: verify stable 5 V reference, ground continuity and signal voltage while slowly moving throttle; note any glitches or drops
- Compare both TPS channels (if present) or compare TPS signal vs accelerator pedal position PID — they should correlate smoothly; if not, suspect sensor/harness
- Perform continuity/resistance checks from TPS connector to ECU connector to detect open or short circuits; check for shorts to ground or 12 V
- If wiring and power/ground are correct but signal is erratic, remove and inspect sensor/throttle body for contamination or mechanical binding; clean or replace as required
- If throttle body is drive-by-wire, check throttle actuator motor/current PIDs where available; perform throttle body relearn/calibration procedure per manufacturer after repairs
- If all hardware checks pass, check for ECU software updates/TB calibration bulletin; consider ECU diagnostic or replacement only after eliminating harness/sensor/body faults
- After repairs, clear codes and verify proper operation on road and with live data; confirm code does not return
Likely causes
- Damaged/contaminated throttle position sensor or throttle body
- Wiring harness connector corrosion or broken wire at the harness/connector
- Loss of 5V reference or bad ground to the sensor
- Throttle body mechanical binding or buildup causing incorrect position feedback
Fault status
Status
Throttle position signal implausible — control module detected inconsistent or out-of-range throttle position input.
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
Similar codes
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Was this AI description helpful?
Your feedback helps improve AI descriptions.
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Send to email
Code
P1220
Other
P — Powertrain
Series Throttle Control System Malfunction
Views:
UK: 23
EN: 22
RU: 26
AI status
Completed
Completed
100%
Causes
- Faulty throttle position sensor (TPS) or throttle body position sensor
- Open/shorted wiring between TPS and ECU (including damaged insulation, corroded pins)
- Poor ground or 5V reference supply to the sensor
- Contaminated or mechanically sticking throttle plate/throttle body
- Faulty throttle actuator motor or internal throttle body electronics
- Intermittent connector contact (water, corrosion, bent pins)
Symptoms
- Check Engine Light (MIL) illuminated
- Reduced engine power / limp-home mode
- Erratic or high/low idle speed
- Poor throttle response, hesitation or surging
- Intermittent stall at idle or when slowing down
- Possible inability to accelerate normally
What to check
- Read stored DTCs and freeze-frame data with a capable scan tool
- Check for related codes (pedal position, throttle actuator, CAN/communication faults)
- Observe live TPS/throttle angle sensor PIDs while slowly opening/closing throttle and pressing pedal
- Visually inspect throttle body, sensor connectors and wiring for corrosion, damage or contamination
- Check battery voltage and engine ground integrity (low voltage can corrupt sensor readings)
- Perform wiggle test on wiring/connectors while observing live data for intermittent changes
Signal parameters
- Sensor reference voltage: ~5.0 V (should be stable within ±0.1 V)
- Sensor ground: close to 0 V with good continuity to chassis ground
- TPS signal voltage: ~0.5 V at closed throttle up to ~4.5 V at wide-open (exact range varies by model)
- If dual-channel TPS: two sensor outputs should ramp smoothly and correlate with each other (no sudden divergence)
- Throttle angle PID should change smoothly and proportionally to physical throttle opening/pedal position
Diagnostic algorithm
- Connect a full-function scan tool and record freeze-frame and live data for TPS/throttle angle and accelerator pedal sensors
- Check battery voltage and charging system; low voltage can produce erroneous readings
- Visually inspect throttle body, TPS connector and wiring for corrosion, water ingress, broken pins, chafing or rodent damage
- Back-probe the TPS connector: verify stable 5 V reference, ground continuity and signal voltage while slowly moving throttle; note any glitches or drops
- Compare both TPS channels (if present) or compare TPS signal vs accelerator pedal position PID — they should correlate smoothly; if not, suspect sensor/harness
- Perform continuity/resistance checks from TPS connector to ECU connector to detect open or short circuits; check for shorts to ground or 12 V
- If wiring and power/ground are correct but signal is erratic, remove and inspect sensor/throttle body for contamination or mechanical binding; clean or replace as required
- If throttle body is drive-by-wire, check throttle actuator motor/current PIDs where available; perform throttle body relearn/calibration procedure per manufacturer after repairs
- If all hardware checks pass, check for ECU software updates/TB calibration bulletin; consider ECU diagnostic or replacement only after eliminating harness/sensor/body faults
- After repairs, clear codes and verify proper operation on road and with live data; confirm code does not return
Likely causes
- Damaged/contaminated throttle position sensor or throttle body
- Wiring harness connector corrosion or broken wire at the harness/connector
- Loss of 5V reference or bad ground to the sensor
- Throttle body mechanical binding or buildup causing incorrect position feedback
Fault status
Status
Throttle position signal implausible — control module detected inconsistent or out-of-range throttle position input.
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
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Code
P1220
RAM
P — Powertrain
Fuel Quantity Actuator
Views:
UK: 0
EN: 0
RU: 0
AI status
Completed
Completed
100%
Causes
- Faulty throttle position sensor (TPS) or throttle body position sensor
- Open/shorted wiring between TPS and ECU (including damaged insulation, corroded pins)
- Poor ground or 5V reference supply to the sensor
- Contaminated or mechanically sticking throttle plate/throttle body
- Faulty throttle actuator motor or internal throttle body electronics
- Intermittent connector contact (water, corrosion, bent pins)
Symptoms
- Check Engine Light (MIL) illuminated
- Reduced engine power / limp-home mode
- Erratic or high/low idle speed
- Poor throttle response, hesitation or surging
- Intermittent stall at idle or when slowing down
- Possible inability to accelerate normally
What to check
- Read stored DTCs and freeze-frame data with a capable scan tool
- Check for related codes (pedal position, throttle actuator, CAN/communication faults)
- Observe live TPS/throttle angle sensor PIDs while slowly opening/closing throttle and pressing pedal
- Visually inspect throttle body, sensor connectors and wiring for corrosion, damage or contamination
- Check battery voltage and engine ground integrity (low voltage can corrupt sensor readings)
- Perform wiggle test on wiring/connectors while observing live data for intermittent changes
Signal parameters
- Sensor reference voltage: ~5.0 V (should be stable within ±0.1 V)
- Sensor ground: close to 0 V with good continuity to chassis ground
- TPS signal voltage: ~0.5 V at closed throttle up to ~4.5 V at wide-open (exact range varies by model)
- If dual-channel TPS: two sensor outputs should ramp smoothly and correlate with each other (no sudden divergence)
- Throttle angle PID should change smoothly and proportionally to physical throttle opening/pedal position
Diagnostic algorithm
- Connect a full-function scan tool and record freeze-frame and live data for TPS/throttle angle and accelerator pedal sensors
- Check battery voltage and charging system; low voltage can produce erroneous readings
- Visually inspect throttle body, TPS connector and wiring for corrosion, water ingress, broken pins, chafing or rodent damage
- Back-probe the TPS connector: verify stable 5 V reference, ground continuity and signal voltage while slowly moving throttle; note any glitches or drops
- Compare both TPS channels (if present) or compare TPS signal vs accelerator pedal position PID — they should correlate smoothly; if not, suspect sensor/harness
- Perform continuity/resistance checks from TPS connector to ECU connector to detect open or short circuits; check for shorts to ground or 12 V
- If wiring and power/ground are correct but signal is erratic, remove and inspect sensor/throttle body for contamination or mechanical binding; clean or replace as required
- If throttle body is drive-by-wire, check throttle actuator motor/current PIDs where available; perform throttle body relearn/calibration procedure per manufacturer after repairs
- If all hardware checks pass, check for ECU software updates/TB calibration bulletin; consider ECU diagnostic or replacement only after eliminating harness/sensor/body faults
- After repairs, clear codes and verify proper operation on road and with live data; confirm code does not return
Likely causes
- Damaged/contaminated throttle position sensor or throttle body
- Wiring harness connector corrosion or broken wire at the harness/connector
- Loss of 5V reference or bad ground to the sensor
- Throttle body mechanical binding or buildup causing incorrect position feedback
Fault status
Status
Throttle position signal implausible — control module detected inconsistent or out-of-range throttle position input.
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
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Code
P1220
SATURN
P — Powertrain
Throttle Position TP Sensor 2 Circuit
Views:
UK: 25
EN: 25
RU: 28
AI status
Completed
Completed
100%
Causes
- Faulty throttle position sensor (TPS) or throttle body position sensor
- Open/shorted wiring between TPS and ECU (including damaged insulation, corroded pins)
- Poor ground or 5V reference supply to the sensor
- Contaminated or mechanically sticking throttle plate/throttle body
- Faulty throttle actuator motor or internal throttle body electronics
- Intermittent connector contact (water, corrosion, bent pins)
Symptoms
- Check Engine Light (MIL) illuminated
- Reduced engine power / limp-home mode
- Erratic or high/low idle speed
- Poor throttle response, hesitation or surging
- Intermittent stall at idle or when slowing down
- Possible inability to accelerate normally
What to check
- Read stored DTCs and freeze-frame data with a capable scan tool
- Check for related codes (pedal position, throttle actuator, CAN/communication faults)
- Observe live TPS/throttle angle sensor PIDs while slowly opening/closing throttle and pressing pedal
- Visually inspect throttle body, sensor connectors and wiring for corrosion, damage or contamination
- Check battery voltage and engine ground integrity (low voltage can corrupt sensor readings)
- Perform wiggle test on wiring/connectors while observing live data for intermittent changes
Signal parameters
- Sensor reference voltage: ~5.0 V (should be stable within ±0.1 V)
- Sensor ground: close to 0 V with good continuity to chassis ground
- TPS signal voltage: ~0.5 V at closed throttle up to ~4.5 V at wide-open (exact range varies by model)
- If dual-channel TPS: two sensor outputs should ramp smoothly and correlate with each other (no sudden divergence)
- Throttle angle PID should change smoothly and proportionally to physical throttle opening/pedal position
Diagnostic algorithm
- Connect a full-function scan tool and record freeze-frame and live data for TPS/throttle angle and accelerator pedal sensors
- Check battery voltage and charging system; low voltage can produce erroneous readings
- Visually inspect throttle body, TPS connector and wiring for corrosion, water ingress, broken pins, chafing or rodent damage
- Back-probe the TPS connector: verify stable 5 V reference, ground continuity and signal voltage while slowly moving throttle; note any glitches or drops
- Compare both TPS channels (if present) or compare TPS signal vs accelerator pedal position PID — they should correlate smoothly; if not, suspect sensor/harness
- Perform continuity/resistance checks from TPS connector to ECU connector to detect open or short circuits; check for shorts to ground or 12 V
- If wiring and power/ground are correct but signal is erratic, remove and inspect sensor/throttle body for contamination or mechanical binding; clean or replace as required
- If throttle body is drive-by-wire, check throttle actuator motor/current PIDs where available; perform throttle body relearn/calibration procedure per manufacturer after repairs
- If all hardware checks pass, check for ECU software updates/TB calibration bulletin; consider ECU diagnostic or replacement only after eliminating harness/sensor/body faults
- After repairs, clear codes and verify proper operation on road and with live data; confirm code does not return
Likely causes
- Damaged/contaminated throttle position sensor or throttle body
- Wiring harness connector corrosion or broken wire at the harness/connector
- Loss of 5V reference or bad ground to the sensor
- Throttle body mechanical binding or buildup causing incorrect position feedback
Fault status
Status
Throttle position signal implausible — control module detected inconsistent or out-of-range throttle position input.
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
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Code
P1220
SCION
P — Powertrain
Fuel pump control circuit malfunction
Views:
UK: 0
EN: 0
RU: 0
AI status
Completed
Completed
100%
Causes
- Faulty throttle position sensor (TPS) or throttle body position sensor
- Open/shorted wiring between TPS and ECU (including damaged insulation, corroded pins)
- Poor ground or 5V reference supply to the sensor
- Contaminated or mechanically sticking throttle plate/throttle body
- Faulty throttle actuator motor or internal throttle body electronics
- Intermittent connector contact (water, corrosion, bent pins)
Symptoms
- Check Engine Light (MIL) illuminated
- Reduced engine power / limp-home mode
- Erratic or high/low idle speed
- Poor throttle response, hesitation or surging
- Intermittent stall at idle or when slowing down
- Possible inability to accelerate normally
What to check
- Read stored DTCs and freeze-frame data with a capable scan tool
- Check for related codes (pedal position, throttle actuator, CAN/communication faults)
- Observe live TPS/throttle angle sensor PIDs while slowly opening/closing throttle and pressing pedal
- Visually inspect throttle body, sensor connectors and wiring for corrosion, damage or contamination
- Check battery voltage and engine ground integrity (low voltage can corrupt sensor readings)
- Perform wiggle test on wiring/connectors while observing live data for intermittent changes
Signal parameters
- Sensor reference voltage: ~5.0 V (should be stable within ±0.1 V)
- Sensor ground: close to 0 V with good continuity to chassis ground
- TPS signal voltage: ~0.5 V at closed throttle up to ~4.5 V at wide-open (exact range varies by model)
- If dual-channel TPS: two sensor outputs should ramp smoothly and correlate with each other (no sudden divergence)
- Throttle angle PID should change smoothly and proportionally to physical throttle opening/pedal position
Diagnostic algorithm
- Connect a full-function scan tool and record freeze-frame and live data for TPS/throttle angle and accelerator pedal sensors
- Check battery voltage and charging system; low voltage can produce erroneous readings
- Visually inspect throttle body, TPS connector and wiring for corrosion, water ingress, broken pins, chafing or rodent damage
- Back-probe the TPS connector: verify stable 5 V reference, ground continuity and signal voltage while slowly moving throttle; note any glitches or drops
- Compare both TPS channels (if present) or compare TPS signal vs accelerator pedal position PID — they should correlate smoothly; if not, suspect sensor/harness
- Perform continuity/resistance checks from TPS connector to ECU connector to detect open or short circuits; check for shorts to ground or 12 V
- If wiring and power/ground are correct but signal is erratic, remove and inspect sensor/throttle body for contamination or mechanical binding; clean or replace as required
- If throttle body is drive-by-wire, check throttle actuator motor/current PIDs where available; perform throttle body relearn/calibration procedure per manufacturer after repairs
- If all hardware checks pass, check for ECU software updates/TB calibration bulletin; consider ECU diagnostic or replacement only after eliminating harness/sensor/body faults
- After repairs, clear codes and verify proper operation on road and with live data; confirm code does not return
Likely causes
- Damaged/contaminated throttle position sensor or throttle body
- Wiring harness connector corrosion or broken wire at the harness/connector
- Loss of 5V reference or bad ground to the sensor
- Throttle body mechanical binding or buildup causing incorrect position feedback
Fault status
Status
Throttle position signal implausible — control module detected inconsistent or out-of-range throttle position input.
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
Similar codes
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
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Send to email
Code
P1220
VOLKSWAGEN
P — Powertrain
Cylinder 8 Fuel Injector Circuit Short To B+
Views:
UK: 21
EN: 21
RU: 24
AI status
Completed
Completed
100%
Causes
- Faulty throttle position sensor (TPS) or throttle body position sensor
- Open/shorted wiring between TPS and ECU (including damaged insulation, corroded pins)
- Poor ground or 5V reference supply to the sensor
- Contaminated or mechanically sticking throttle plate/throttle body
- Faulty throttle actuator motor or internal throttle body electronics
- Intermittent connector contact (water, corrosion, bent pins)
Symptoms
- Check Engine Light (MIL) illuminated
- Reduced engine power / limp-home mode
- Erratic or high/low idle speed
- Poor throttle response, hesitation or surging
- Intermittent stall at idle or when slowing down
- Possible inability to accelerate normally
What to check
- Read stored DTCs and freeze-frame data with a capable scan tool
- Check for related codes (pedal position, throttle actuator, CAN/communication faults)
- Observe live TPS/throttle angle sensor PIDs while slowly opening/closing throttle and pressing pedal
- Visually inspect throttle body, sensor connectors and wiring for corrosion, damage or contamination
- Check battery voltage and engine ground integrity (low voltage can corrupt sensor readings)
- Perform wiggle test on wiring/connectors while observing live data for intermittent changes
Signal parameters
- Sensor reference voltage: ~5.0 V (should be stable within ±0.1 V)
- Sensor ground: close to 0 V with good continuity to chassis ground
- TPS signal voltage: ~0.5 V at closed throttle up to ~4.5 V at wide-open (exact range varies by model)
- If dual-channel TPS: two sensor outputs should ramp smoothly and correlate with each other (no sudden divergence)
- Throttle angle PID should change smoothly and proportionally to physical throttle opening/pedal position
Diagnostic algorithm
- Connect a full-function scan tool and record freeze-frame and live data for TPS/throttle angle and accelerator pedal sensors
- Check battery voltage and charging system; low voltage can produce erroneous readings
- Visually inspect throttle body, TPS connector and wiring for corrosion, water ingress, broken pins, chafing or rodent damage
- Back-probe the TPS connector: verify stable 5 V reference, ground continuity and signal voltage while slowly moving throttle; note any glitches or drops
- Compare both TPS channels (if present) or compare TPS signal vs accelerator pedal position PID — they should correlate smoothly; if not, suspect sensor/harness
- Perform continuity/resistance checks from TPS connector to ECU connector to detect open or short circuits; check for shorts to ground or 12 V
- If wiring and power/ground are correct but signal is erratic, remove and inspect sensor/throttle body for contamination or mechanical binding; clean or replace as required
- If throttle body is drive-by-wire, check throttle actuator motor/current PIDs where available; perform throttle body relearn/calibration procedure per manufacturer after repairs
- If all hardware checks pass, check for ECU software updates/TB calibration bulletin; consider ECU diagnostic or replacement only after eliminating harness/sensor/body faults
- After repairs, clear codes and verify proper operation on road and with live data; confirm code does not return
Likely causes
- Damaged/contaminated throttle position sensor or throttle body
- Wiring harness connector corrosion or broken wire at the harness/connector
- Loss of 5V reference or bad ground to the sensor
- Throttle body mechanical binding or buildup causing incorrect position feedback
Fault status
Status
Throttle position signal implausible — control module detected inconsistent or out-of-range throttle position input.
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
Similar codes
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