Code
P0122
Generic
P — Powertrain
Throttle/Pedal Position Sensor/Switch A Circuit Low
Views:
UK: 33
EN: 113
RU: 51
AI status
Completed
Completed
100%
Causes
- Open or shorted wiring between TPS/PPS and ECM (short to ground)
- Poor or corroded connector or pin at sensor or ECM
- Failed or contaminated throttle/pedal position sensor (internal short or damaged element)
- Loose or broken sensor mounting or mechanical interference with sensor shaft
- Low or missing reference voltage from ECM (5V reference)
- Aftermarket components or recent repair with incorrect connector/wiring
Symptoms
- Check Engine Light (MIL) illuminated
- Reduced engine power or activation of limp-home mode
- Poor idle, idle hunting, or stalling
- Hesitation or flat spots during acceleration
- Engine may not respond to throttle or throttle control feels abnormal
What to check
- Retrieve freeze frame data and confirm P0122 is current; note conditions (throttle position, vehicle speed, engine RPM, battery voltage)
- Visually inspect TPS/PPS connector, pins and wiring for damage, corrosion, pin push-out, or oil contamination
- Check for other related codes (P0120, P0121, P0123, P0222, P2135) that could indicate multiple sensor issues
- Measure sensor signal voltage, 5V reference and ground at the sensor connector with key ON engine OFF
- Wiggle test wiring and connector while monitoring signal for intermittent faults
- Disconnect sensor and see if code behavior changes (some vehicles store different subcodes)
Signal parameters
- ECM reference voltage (VREF): ≈5.0 V (key ON, engine OFF)
- TPS/PPS signal at closed throttle: typically ~0.2–0.5 V (varies by vehicle)
- TPS/PPS signal at wide open throttle: typically ~4.0–4.5 V
- A signal below ~0.1–0.2 V or dropping to 0 V is usually considered 'low' and will set P0122
- Signal should change smoothly and monotonically as throttle/pedal moves (no jumps or dropouts)
Diagnostic algorithm
- Safety: Park vehicle, set parking brake, wear eye protection. If tests require engine running, take necessary precautions.
- Read codes and freeze frame with a scan tool. Note if code is pending or confirmed and any related codes.
- Visual inspection: Check TPS/PPS connector and wiring for damage, corrosion, pin damage, moisture or oil intrusion. Repair any obvious issues.
- With key ON (engine OFF) backprobe the TPS/PPS connector: measure VREF (should be ~5V), signal voltage, and ground continuity.
- If VREF is missing or low, trace wiring back to ECM, check ECM power/ignition supply fuses and grounds.
- If VREF present and signal is low, inspect for short to ground on the signal wire. With connector disconnected, measure resistance from signal pin to chassis ground; very low resistance suggests a short.
Likely causes
- Damaged wiring harness or pin shorted to ground at sensor connector
- Corroded/loose connector at TPS/PPS
- Failed TPS/PPS (internal short or open)
- Weak/absent 5V reference from ECM or bad ground at ECM
Fault status
Status
PCM detected Throttle/Pedal Position Sensor 'A' signal voltage below the expected threshold (circuit low).
Repair difficulty: Medium
Diagnostic time: 0.5-2 hours
Similar codes
Workshop Manuals
Available brands with manuals
2
AUDI 11
6-speed manual gearbox 0B1, front-wheel drive — Workshop Manual (Edition 05.2014)
Workshop ManualAudi A3 (1997) – 1.6L 4-cylinder (2‑valve) Engine Mechanical Components Service Manual (AEH, AKL, APF) – Edition 07.2002
Workshop ManualAUDI A3 (2004) Workshop Manual — 2.0L FSI Turbo (4‑cyl, 4‑valve) Engine, Mechanics — Edition 03.2017
Workshop ManualAudi A3 2004 — Electrical System (Workshop Manual, Edition 02.2018)
Workshop ManualAudi A4 / A4 Cabriolet – 4.2 l V8 (5‑valve, timing chains) – Workshop Manual (Mechanics) – Edition 04.2007
Workshop ManualAudi A4 / A4 Cabriolet — Auxiliary Heater Workshop Manual (Edition 08.2004)
Workshop ManualAudi A4 / A4 Cabriolet (1.8T 4‑cyl turbo) — Motronic Injection & Ignition System Service Manual (Edition 01.2015)
Workshop ManualAudi A8 (2003) — Electrical System Workshop Manual (Edition 08.2014)
Workshop ManualAudi Q4 e-tron (Type F4) - Self-study Programme SSP 685
Workshop ManualAudi Q8 (2018) — Electrical System Workshop Manual (Edition 05.2019)
Workshop ManualAudi Servicing Manual — 7‑Speed Dual Clutch Transmission 0CJ / 0CL / 0CK / 0DN / 0DP / 0HL (Edition 05.2018)
Workshop ManualLAND ROVER 3
Land Rover Defender 300Tdi — Workshop Manual (1996 model year)
Workshop ManualLand Rover Defender Workshop Manual Supplement & Body Repair Manual (1999 & 2002 MY)
Workshop ManualLand Rover Range Rover — Electrical Library (LRL 0453ENG, 2002)
Workshop ManualYour experience will help others
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Code
P0122
GWM
P — Powertrain
- Low Throttle Position Sensor / Switch A
Views:
UK: 4
EN: 10
RU: 12
AI status
Completed
Completed
100%
Causes
- Open or shorted wiring between TPS/PPS and ECM (short to ground)
- Poor or corroded connector or pin at sensor or ECM
- Failed or contaminated throttle/pedal position sensor (internal short or damaged element)
- Loose or broken sensor mounting or mechanical interference with sensor shaft
- Low or missing reference voltage from ECM (5V reference)
- Aftermarket components or recent repair with incorrect connector/wiring
Symptoms
- Check Engine Light (MIL) illuminated
- Reduced engine power or activation of limp-home mode
- Poor idle, idle hunting, or stalling
- Hesitation or flat spots during acceleration
- Engine may not respond to throttle or throttle control feels abnormal
What to check
- Retrieve freeze frame data and confirm P0122 is current; note conditions (throttle position, vehicle speed, engine RPM, battery voltage)
- Visually inspect TPS/PPS connector, pins and wiring for damage, corrosion, pin push-out, or oil contamination
- Check for other related codes (P0120, P0121, P0123, P0222, P2135) that could indicate multiple sensor issues
- Measure sensor signal voltage, 5V reference and ground at the sensor connector with key ON engine OFF
- Wiggle test wiring and connector while monitoring signal for intermittent faults
- Disconnect sensor and see if code behavior changes (some vehicles store different subcodes)
Signal parameters
- ECM reference voltage (VREF): ≈5.0 V (key ON, engine OFF)
- TPS/PPS signal at closed throttle: typically ~0.2–0.5 V (varies by vehicle)
- TPS/PPS signal at wide open throttle: typically ~4.0–4.5 V
- A signal below ~0.1–0.2 V or dropping to 0 V is usually considered 'low' and will set P0122
- Signal should change smoothly and monotonically as throttle/pedal moves (no jumps or dropouts)
Diagnostic algorithm
- Safety: Park vehicle, set parking brake, wear eye protection. If tests require engine running, take necessary precautions.
- Read codes and freeze frame with a scan tool. Note if code is pending or confirmed and any related codes.
- Visual inspection: Check TPS/PPS connector and wiring for damage, corrosion, pin damage, moisture or oil intrusion. Repair any obvious issues.
- With key ON (engine OFF) backprobe the TPS/PPS connector: measure VREF (should be ~5V), signal voltage, and ground continuity.
- If VREF is missing or low, trace wiring back to ECM, check ECM power/ignition supply fuses and grounds.
- If VREF present and signal is low, inspect for short to ground on the signal wire. With connector disconnected, measure resistance from signal pin to chassis ground; very low resistance suggests a short.
Likely causes
- Damaged wiring harness or pin shorted to ground at sensor connector
- Corroded/loose connector at TPS/PPS
- Failed TPS/PPS (internal short or open)
- Weak/absent 5V reference from ECM or bad ground at ECM
Fault status
Status
PCM detected Throttle/Pedal Position Sensor 'A' signal voltage below the expected threshold (circuit low).
Repair difficulty: Medium
Diagnostic time: 0.5-2 hours
Similar codes
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Code
P0122
HUMMER
P — Powertrain
Throttle Position (TP) Sensor Circuit Low Voltage
Views:
UK: 17
EN: 26
RU: 30
AI status
Completed
Completed
100%
Causes
- Open or shorted wiring between TPS/PPS and ECM (short to ground)
- Poor or corroded connector or pin at sensor or ECM
- Failed or contaminated throttle/pedal position sensor (internal short or damaged element)
- Loose or broken sensor mounting or mechanical interference with sensor shaft
- Low or missing reference voltage from ECM (5V reference)
- Aftermarket components or recent repair with incorrect connector/wiring
Symptoms
- Check Engine Light (MIL) illuminated
- Reduced engine power or activation of limp-home mode
- Poor idle, idle hunting, or stalling
- Hesitation or flat spots during acceleration
- Engine may not respond to throttle or throttle control feels abnormal
What to check
- Retrieve freeze frame data and confirm P0122 is current; note conditions (throttle position, vehicle speed, engine RPM, battery voltage)
- Visually inspect TPS/PPS connector, pins and wiring for damage, corrosion, pin push-out, or oil contamination
- Check for other related codes (P0120, P0121, P0123, P0222, P2135) that could indicate multiple sensor issues
- Measure sensor signal voltage, 5V reference and ground at the sensor connector with key ON engine OFF
- Wiggle test wiring and connector while monitoring signal for intermittent faults
- Disconnect sensor and see if code behavior changes (some vehicles store different subcodes)
Signal parameters
- ECM reference voltage (VREF): ≈5.0 V (key ON, engine OFF)
- TPS/PPS signal at closed throttle: typically ~0.2–0.5 V (varies by vehicle)
- TPS/PPS signal at wide open throttle: typically ~4.0–4.5 V
- A signal below ~0.1–0.2 V or dropping to 0 V is usually considered 'low' and will set P0122
- Signal should change smoothly and monotonically as throttle/pedal moves (no jumps or dropouts)
Diagnostic algorithm
- Safety: Park vehicle, set parking brake, wear eye protection. If tests require engine running, take necessary precautions.
- Read codes and freeze frame with a scan tool. Note if code is pending or confirmed and any related codes.
- Visual inspection: Check TPS/PPS connector and wiring for damage, corrosion, pin damage, moisture or oil intrusion. Repair any obvious issues.
- With key ON (engine OFF) backprobe the TPS/PPS connector: measure VREF (should be ~5V), signal voltage, and ground continuity.
- If VREF is missing or low, trace wiring back to ECM, check ECM power/ignition supply fuses and grounds.
- If VREF present and signal is low, inspect for short to ground on the signal wire. With connector disconnected, measure resistance from signal pin to chassis ground; very low resistance suggests a short.
Likely causes
- Damaged wiring harness or pin shorted to ground at sensor connector
- Corroded/loose connector at TPS/PPS
- Failed TPS/PPS (internal short or open)
- Weak/absent 5V reference from ECM or bad ground at ECM
Fault status
Status
PCM detected Throttle/Pedal Position Sensor 'A' signal voltage below the expected threshold (circuit low).
Repair difficulty: Medium
Diagnostic time: 0.5-2 hours
Similar codes
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Was this AI description helpful?
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0
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Code
P0122
ISUZU
P — Powertrain
Throttle Position Sensor Circuit Low
Views:
UK: 19
EN: 82
RU: 52
AI status
Completed
Completed
100%
Causes
- Open or shorted wiring between TPS/PPS and ECM (short to ground)
- Poor or corroded connector or pin at sensor or ECM
- Failed or contaminated throttle/pedal position sensor (internal short or damaged element)
- Loose or broken sensor mounting or mechanical interference with sensor shaft
- Low or missing reference voltage from ECM (5V reference)
- Aftermarket components or recent repair with incorrect connector/wiring
Symptoms
- Check Engine Light (MIL) illuminated
- Reduced engine power or activation of limp-home mode
- Poor idle, idle hunting, or stalling
- Hesitation or flat spots during acceleration
- Engine may not respond to throttle or throttle control feels abnormal
What to check
- Retrieve freeze frame data and confirm P0122 is current; note conditions (throttle position, vehicle speed, engine RPM, battery voltage)
- Visually inspect TPS/PPS connector, pins and wiring for damage, corrosion, pin push-out, or oil contamination
- Check for other related codes (P0120, P0121, P0123, P0222, P2135) that could indicate multiple sensor issues
- Measure sensor signal voltage, 5V reference and ground at the sensor connector with key ON engine OFF
- Wiggle test wiring and connector while monitoring signal for intermittent faults
- Disconnect sensor and see if code behavior changes (some vehicles store different subcodes)
Signal parameters
- ECM reference voltage (VREF): ≈5.0 V (key ON, engine OFF)
- TPS/PPS signal at closed throttle: typically ~0.2–0.5 V (varies by vehicle)
- TPS/PPS signal at wide open throttle: typically ~4.0–4.5 V
- A signal below ~0.1–0.2 V or dropping to 0 V is usually considered 'low' and will set P0122
- Signal should change smoothly and monotonically as throttle/pedal moves (no jumps or dropouts)
Diagnostic algorithm
- Safety: Park vehicle, set parking brake, wear eye protection. If tests require engine running, take necessary precautions.
- Read codes and freeze frame with a scan tool. Note if code is pending or confirmed and any related codes.
- Visual inspection: Check TPS/PPS connector and wiring for damage, corrosion, pin damage, moisture or oil intrusion. Repair any obvious issues.
- With key ON (engine OFF) backprobe the TPS/PPS connector: measure VREF (should be ~5V), signal voltage, and ground continuity.
- If VREF is missing or low, trace wiring back to ECM, check ECM power/ignition supply fuses and grounds.
- If VREF present and signal is low, inspect for short to ground on the signal wire. With connector disconnected, measure resistance from signal pin to chassis ground; very low resistance suggests a short.
Likely causes
- Damaged wiring harness or pin shorted to ground at sensor connector
- Corroded/loose connector at TPS/PPS
- Failed TPS/PPS (internal short or open)
- Weak/absent 5V reference from ECM or bad ground at ECM
Fault status
Status
PCM detected Throttle/Pedal Position Sensor 'A' signal voltage below the expected threshold (circuit low).
Repair difficulty: Medium
Diagnostic time: 0.5-2 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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Code
P0122
LAND ROVER
P — Powertrain
Throttle Position Sensor A circuit low input
Views:
UK: 8
EN: 20
RU: 25
AI status
Completed
Completed
100%
Causes
- Open or shorted wiring between TPS/PPS and ECM (short to ground)
- Poor or corroded connector or pin at sensor or ECM
- Failed or contaminated throttle/pedal position sensor (internal short or damaged element)
- Loose or broken sensor mounting or mechanical interference with sensor shaft
- Low or missing reference voltage from ECM (5V reference)
- Aftermarket components or recent repair with incorrect connector/wiring
Symptoms
- Check Engine Light (MIL) illuminated
- Reduced engine power or activation of limp-home mode
- Poor idle, idle hunting, or stalling
- Hesitation or flat spots during acceleration
- Engine may not respond to throttle or throttle control feels abnormal
What to check
- Retrieve freeze frame data and confirm P0122 is current; note conditions (throttle position, vehicle speed, engine RPM, battery voltage)
- Visually inspect TPS/PPS connector, pins and wiring for damage, corrosion, pin push-out, or oil contamination
- Check for other related codes (P0120, P0121, P0123, P0222, P2135) that could indicate multiple sensor issues
- Measure sensor signal voltage, 5V reference and ground at the sensor connector with key ON engine OFF
- Wiggle test wiring and connector while monitoring signal for intermittent faults
- Disconnect sensor and see if code behavior changes (some vehicles store different subcodes)
Signal parameters
- ECM reference voltage (VREF): ≈5.0 V (key ON, engine OFF)
- TPS/PPS signal at closed throttle: typically ~0.2–0.5 V (varies by vehicle)
- TPS/PPS signal at wide open throttle: typically ~4.0–4.5 V
- A signal below ~0.1–0.2 V or dropping to 0 V is usually considered 'low' and will set P0122
- Signal should change smoothly and monotonically as throttle/pedal moves (no jumps or dropouts)
Diagnostic algorithm
- Safety: Park vehicle, set parking brake, wear eye protection. If tests require engine running, take necessary precautions.
- Read codes and freeze frame with a scan tool. Note if code is pending or confirmed and any related codes.
- Visual inspection: Check TPS/PPS connector and wiring for damage, corrosion, pin damage, moisture or oil intrusion. Repair any obvious issues.
- With key ON (engine OFF) backprobe the TPS/PPS connector: measure VREF (should be ~5V), signal voltage, and ground continuity.
- If VREF is missing or low, trace wiring back to ECM, check ECM power/ignition supply fuses and grounds.
- If VREF present and signal is low, inspect for short to ground on the signal wire. With connector disconnected, measure resistance from signal pin to chassis ground; very low resistance suggests a short.
Likely causes
- Damaged wiring harness or pin shorted to ground at sensor connector
- Corroded/loose connector at TPS/PPS
- Failed TPS/PPS (internal short or open)
- Weak/absent 5V reference from ECM or bad ground at ECM
Fault status
Status
PCM detected Throttle/Pedal Position Sensor 'A' signal voltage below the expected threshold (circuit low).
Repair difficulty: Medium
Diagnostic time: 0.5-2 hours
Similar codes
Workshop Manuals
Repair manuals for LAND ROVER
3
Land Rover Defender 300Tdi — Workshop Manual (1996 model year)
Workshop ManualLand Rover Defender Workshop Manual Supplement & Body Repair Manual (1999 & 2002 MY)
Workshop ManualLand Rover Range Rover — Electrical Library (LRL 0453ENG, 2002)
Workshop ManualYour experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
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👍 Like
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Code
P0122
MITSUBISHI
P — Powertrain
TPS(main) low
Views:
UK: 12
EN: 28
RU: 29
AI status
Completed
Completed
100%
Causes
- Open or shorted wiring between TPS/PPS and ECM (short to ground)
- Poor or corroded connector or pin at sensor or ECM
- Failed or contaminated throttle/pedal position sensor (internal short or damaged element)
- Loose or broken sensor mounting or mechanical interference with sensor shaft
- Low or missing reference voltage from ECM (5V reference)
- Aftermarket components or recent repair with incorrect connector/wiring
Symptoms
- Check Engine Light (MIL) illuminated
- Reduced engine power or activation of limp-home mode
- Poor idle, idle hunting, or stalling
- Hesitation or flat spots during acceleration
- Engine may not respond to throttle or throttle control feels abnormal
What to check
- Retrieve freeze frame data and confirm P0122 is current; note conditions (throttle position, vehicle speed, engine RPM, battery voltage)
- Visually inspect TPS/PPS connector, pins and wiring for damage, corrosion, pin push-out, or oil contamination
- Check for other related codes (P0120, P0121, P0123, P0222, P2135) that could indicate multiple sensor issues
- Measure sensor signal voltage, 5V reference and ground at the sensor connector with key ON engine OFF
- Wiggle test wiring and connector while monitoring signal for intermittent faults
- Disconnect sensor and see if code behavior changes (some vehicles store different subcodes)
Signal parameters
- ECM reference voltage (VREF): ≈5.0 V (key ON, engine OFF)
- TPS/PPS signal at closed throttle: typically ~0.2–0.5 V (varies by vehicle)
- TPS/PPS signal at wide open throttle: typically ~4.0–4.5 V
- A signal below ~0.1–0.2 V or dropping to 0 V is usually considered 'low' and will set P0122
- Signal should change smoothly and monotonically as throttle/pedal moves (no jumps or dropouts)
Diagnostic algorithm
- Safety: Park vehicle, set parking brake, wear eye protection. If tests require engine running, take necessary precautions.
- Read codes and freeze frame with a scan tool. Note if code is pending or confirmed and any related codes.
- Visual inspection: Check TPS/PPS connector and wiring for damage, corrosion, pin damage, moisture or oil intrusion. Repair any obvious issues.
- With key ON (engine OFF) backprobe the TPS/PPS connector: measure VREF (should be ~5V), signal voltage, and ground continuity.
- If VREF is missing or low, trace wiring back to ECM, check ECM power/ignition supply fuses and grounds.
- If VREF present and signal is low, inspect for short to ground on the signal wire. With connector disconnected, measure resistance from signal pin to chassis ground; very low resistance suggests a short.
Likely causes
- Damaged wiring harness or pin shorted to ground at sensor connector
- Corroded/loose connector at TPS/PPS
- Failed TPS/PPS (internal short or open)
- Weak/absent 5V reference from ECM or bad ground at ECM
Fault status
Status
PCM detected Throttle/Pedal Position Sensor 'A' signal voltage below the expected threshold (circuit low).
Repair difficulty: Medium
Diagnostic time: 0.5-2 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