Code
P1222
ALFA ROMEO
P — Powertrain
Accelerator potentiometer track 2 fault | Drive-by-wire potentiometer 2 signal implausible
Views:
UK: 20
EN: 29
RU: 31
AI status
Completed
Completed
100%
Causes
- Open or short in accelerator pedal sensor (track 2) wiring
- Corroded, loose or damaged pedal connector or terminals
- Failed accelerator pedal position sensor (track 2) inside the pedal assembly
- Poor ground or 5V reference supply from the ECU
- Intermittent wiring harness damage (chafing, water intrusion)
- Software/ECU fault (rare)
Symptoms
- Check engine/warning light illuminated
- Reduced engine power / limp-home mode / limited throttle response
- Engine may not respond to accelerator pedal input or response is delayed
- Possible inconsistent throttle behavior or sudden surges when pressing pedal
What to check
- Retrieve freeze frame and live data with a capable scan tool (read both pedal tracks and throttle demand)
- Visually inspect accelerator pedal connector and wiring harness for damage, corrosion, or water entry
- Wiggle test: monitor track 2 signal while moving harness and pedal connector to look for intermittent changes
- Check for other related DTCs (throttle body, reference voltage, CAN bus)
- Measure reference voltage (typically ~5V) and ground at the pedal connector with key ON, engine OFF
Signal parameters
- Typical APP potentiometer signals: 0.5–4.5 V sweep across full pedal travel (varies by model)
- Track 1 and track 2 should move together and show a consistent linear relationship; difference beyond expected tolerance (manufacturer-specific) is implausible
- Open circuit: signal near 0 V; short to battery: signal near battery voltage (≈12 V) — both are fault indications
Diagnostic algorithm
- Read and record DTC(s) and live data for both pedal tracks and throttle position with a diagnostic scan tool.
- Perform visual inspection of pedal connector and wiring for corrosion, bent pins, damage or water contamination.
- With key ON (engine OFF) measure reference voltage and ground at the pedal connector; confirm ~5V reference and good ground continuity to chassis/ECU.
- Monitor live voltages/signals for track 1 and track 2 while slowly operating the pedal; note ranges, linearity, and any dropouts or noise.
- If reference and ground are correct but track 2 is out of range or inconsistent, backprobe connector and wiggle harness to locate intermittent wiring faults.
- Check continuity between pedal connector and ECU connector for track 2, reference 5V and ground; repair any opens/shorts.
- If wiring and connectors test good, replace or bench-test the accelerator pedal assembly (compare track 1 vs track 2 behavior).
- After repair, clear codes and perform accelerator pedal calibration/relearn if required by manufacturer; re-check for return of code and verify normal throttle response.
- If faults persist after replacing pedal and repairing wiring, inspect ECU power/ground and consider ECU diagnosis or replacement as last resort.
Likely causes
- Dirty/corroded connector at pedal assembly or ECU
- Broken wire or high-resistance splice to sensor track 2
- Internal failure of pedal potentiometer (track 2)
- Loss of reference 5V or ground affecting sensor readings
Fault status
Status
Accelerator potentiometer track 2 fault — drive-by-wire potentiometer 2 signal implausible. Check pedal sensor, wiring, reference supply and grounding.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
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Code
P1222
BMW
P — Powertrain
Pedal Position Sensor 2 Low Input
Views:
UK: 29
EN: 70
RU: 43
AI status
Completed
Completed
100%
Causes
- Open or short in accelerator pedal sensor (track 2) wiring
- Corroded, loose or damaged pedal connector or terminals
- Failed accelerator pedal position sensor (track 2) inside the pedal assembly
- Poor ground or 5V reference supply from the ECU
- Intermittent wiring harness damage (chafing, water intrusion)
- Software/ECU fault (rare)
Symptoms
- Check engine/warning light illuminated
- Reduced engine power / limp-home mode / limited throttle response
- Engine may not respond to accelerator pedal input or response is delayed
- Possible inconsistent throttle behavior or sudden surges when pressing pedal
What to check
- Retrieve freeze frame and live data with a capable scan tool (read both pedal tracks and throttle demand)
- Visually inspect accelerator pedal connector and wiring harness for damage, corrosion, or water entry
- Wiggle test: monitor track 2 signal while moving harness and pedal connector to look for intermittent changes
- Check for other related DTCs (throttle body, reference voltage, CAN bus)
- Measure reference voltage (typically ~5V) and ground at the pedal connector with key ON, engine OFF
Signal parameters
- Typical APP potentiometer signals: 0.5–4.5 V sweep across full pedal travel (varies by model)
- Track 1 and track 2 should move together and show a consistent linear relationship; difference beyond expected tolerance (manufacturer-specific) is implausible
- Open circuit: signal near 0 V; short to battery: signal near battery voltage (≈12 V) — both are fault indications
Diagnostic algorithm
- Read and record DTC(s) and live data for both pedal tracks and throttle position with a diagnostic scan tool.
- Perform visual inspection of pedal connector and wiring for corrosion, bent pins, damage or water contamination.
- With key ON (engine OFF) measure reference voltage and ground at the pedal connector; confirm ~5V reference and good ground continuity to chassis/ECU.
- Monitor live voltages/signals for track 1 and track 2 while slowly operating the pedal; note ranges, linearity, and any dropouts or noise.
- If reference and ground are correct but track 2 is out of range or inconsistent, backprobe connector and wiggle harness to locate intermittent wiring faults.
- Check continuity between pedal connector and ECU connector for track 2, reference 5V and ground; repair any opens/shorts.
- If wiring and connectors test good, replace or bench-test the accelerator pedal assembly (compare track 1 vs track 2 behavior).
- After repair, clear codes and perform accelerator pedal calibration/relearn if required by manufacturer; re-check for return of code and verify normal throttle response.
- If faults persist after replacing pedal and repairing wiring, inspect ECU power/ground and consider ECU diagnosis or replacement as last resort.
Likely causes
- Dirty/corroded connector at pedal assembly or ECU
- Broken wire or high-resistance splice to sensor track 2
- Internal failure of pedal potentiometer (track 2)
- Loss of reference 5V or ground affecting sensor readings
Fault status
Status
Accelerator potentiometer track 2 fault — drive-by-wire potentiometer 2 signal implausible. Check pedal sensor, wiring, reference supply and grounding.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
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Code
P1222
BUICK
P — Powertrain
Injector Control Circuit Intermittent
Views:
UK: 28
EN: 65
RU: 52
AI status
Completed
Completed
100%
Causes
- Open or short in accelerator pedal sensor (track 2) wiring
- Corroded, loose or damaged pedal connector or terminals
- Failed accelerator pedal position sensor (track 2) inside the pedal assembly
- Poor ground or 5V reference supply from the ECU
- Intermittent wiring harness damage (chafing, water intrusion)
- Software/ECU fault (rare)
Symptoms
- Check engine/warning light illuminated
- Reduced engine power / limp-home mode / limited throttle response
- Engine may not respond to accelerator pedal input or response is delayed
- Possible inconsistent throttle behavior or sudden surges when pressing pedal
What to check
- Retrieve freeze frame and live data with a capable scan tool (read both pedal tracks and throttle demand)
- Visually inspect accelerator pedal connector and wiring harness for damage, corrosion, or water entry
- Wiggle test: monitor track 2 signal while moving harness and pedal connector to look for intermittent changes
- Check for other related DTCs (throttle body, reference voltage, CAN bus)
- Measure reference voltage (typically ~5V) and ground at the pedal connector with key ON, engine OFF
Signal parameters
- Typical APP potentiometer signals: 0.5–4.5 V sweep across full pedal travel (varies by model)
- Track 1 and track 2 should move together and show a consistent linear relationship; difference beyond expected tolerance (manufacturer-specific) is implausible
- Open circuit: signal near 0 V; short to battery: signal near battery voltage (≈12 V) — both are fault indications
Diagnostic algorithm
- Read and record DTC(s) and live data for both pedal tracks and throttle position with a diagnostic scan tool.
- Perform visual inspection of pedal connector and wiring for corrosion, bent pins, damage or water contamination.
- With key ON (engine OFF) measure reference voltage and ground at the pedal connector; confirm ~5V reference and good ground continuity to chassis/ECU.
- Monitor live voltages/signals for track 1 and track 2 while slowly operating the pedal; note ranges, linearity, and any dropouts or noise.
- If reference and ground are correct but track 2 is out of range or inconsistent, backprobe connector and wiggle harness to locate intermittent wiring faults.
- Check continuity between pedal connector and ECU connector for track 2, reference 5V and ground; repair any opens/shorts.
- If wiring and connectors test good, replace or bench-test the accelerator pedal assembly (compare track 1 vs track 2 behavior).
- After repair, clear codes and perform accelerator pedal calibration/relearn if required by manufacturer; re-check for return of code and verify normal throttle response.
- If faults persist after replacing pedal and repairing wiring, inspect ECU power/ground and consider ECU diagnosis or replacement as last resort.
Likely causes
- Dirty/corroded connector at pedal assembly or ECU
- Broken wire or high-resistance splice to sensor track 2
- Internal failure of pedal potentiometer (track 2)
- Loss of reference 5V or ground affecting sensor readings
Fault status
Status
Accelerator potentiometer track 2 fault — drive-by-wire potentiometer 2 signal implausible. Check pedal sensor, wiring, reference supply and grounding.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
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Code
P1222
CADILLAC
P — Powertrain
Injector Control Circuit Intermittent
Views:
UK: 32
EN: 81
RU: 45
AI status
Completed
Completed
100%
Causes
- Open or short in accelerator pedal sensor (track 2) wiring
- Corroded, loose or damaged pedal connector or terminals
- Failed accelerator pedal position sensor (track 2) inside the pedal assembly
- Poor ground or 5V reference supply from the ECU
- Intermittent wiring harness damage (chafing, water intrusion)
- Software/ECU fault (rare)
Symptoms
- Check engine/warning light illuminated
- Reduced engine power / limp-home mode / limited throttle response
- Engine may not respond to accelerator pedal input or response is delayed
- Possible inconsistent throttle behavior or sudden surges when pressing pedal
What to check
- Retrieve freeze frame and live data with a capable scan tool (read both pedal tracks and throttle demand)
- Visually inspect accelerator pedal connector and wiring harness for damage, corrosion, or water entry
- Wiggle test: monitor track 2 signal while moving harness and pedal connector to look for intermittent changes
- Check for other related DTCs (throttle body, reference voltage, CAN bus)
- Measure reference voltage (typically ~5V) and ground at the pedal connector with key ON, engine OFF
Signal parameters
- Typical APP potentiometer signals: 0.5–4.5 V sweep across full pedal travel (varies by model)
- Track 1 and track 2 should move together and show a consistent linear relationship; difference beyond expected tolerance (manufacturer-specific) is implausible
- Open circuit: signal near 0 V; short to battery: signal near battery voltage (≈12 V) — both are fault indications
Diagnostic algorithm
- Read and record DTC(s) and live data for both pedal tracks and throttle position with a diagnostic scan tool.
- Perform visual inspection of pedal connector and wiring for corrosion, bent pins, damage or water contamination.
- With key ON (engine OFF) measure reference voltage and ground at the pedal connector; confirm ~5V reference and good ground continuity to chassis/ECU.
- Monitor live voltages/signals for track 1 and track 2 while slowly operating the pedal; note ranges, linearity, and any dropouts or noise.
- If reference and ground are correct but track 2 is out of range or inconsistent, backprobe connector and wiggle harness to locate intermittent wiring faults.
- Check continuity between pedal connector and ECU connector for track 2, reference 5V and ground; repair any opens/shorts.
- If wiring and connectors test good, replace or bench-test the accelerator pedal assembly (compare track 1 vs track 2 behavior).
- After repair, clear codes and perform accelerator pedal calibration/relearn if required by manufacturer; re-check for return of code and verify normal throttle response.
- If faults persist after replacing pedal and repairing wiring, inspect ECU power/ground and consider ECU diagnosis or replacement as last resort.
Likely causes
- Dirty/corroded connector at pedal assembly or ECU
- Broken wire or high-resistance splice to sensor track 2
- Internal failure of pedal potentiometer (track 2)
- Loss of reference 5V or ground affecting sensor readings
Fault status
Status
Accelerator potentiometer track 2 fault — drive-by-wire potentiometer 2 signal implausible. Check pedal sensor, wiring, reference supply and grounding.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
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Code
P1222
CHEVROLET
P — Powertrain
Injector Control Circuit Intermittent
Views:
UK: 28
EN: 68
RU: 40
AI status
Completed
Completed
100%
Causes
- Open or short in accelerator pedal sensor (track 2) wiring
- Corroded, loose or damaged pedal connector or terminals
- Failed accelerator pedal position sensor (track 2) inside the pedal assembly
- Poor ground or 5V reference supply from the ECU
- Intermittent wiring harness damage (chafing, water intrusion)
- Software/ECU fault (rare)
Symptoms
- Check engine/warning light illuminated
- Reduced engine power / limp-home mode / limited throttle response
- Engine may not respond to accelerator pedal input or response is delayed
- Possible inconsistent throttle behavior or sudden surges when pressing pedal
What to check
- Retrieve freeze frame and live data with a capable scan tool (read both pedal tracks and throttle demand)
- Visually inspect accelerator pedal connector and wiring harness for damage, corrosion, or water entry
- Wiggle test: monitor track 2 signal while moving harness and pedal connector to look for intermittent changes
- Check for other related DTCs (throttle body, reference voltage, CAN bus)
- Measure reference voltage (typically ~5V) and ground at the pedal connector with key ON, engine OFF
Signal parameters
- Typical APP potentiometer signals: 0.5–4.5 V sweep across full pedal travel (varies by model)
- Track 1 and track 2 should move together and show a consistent linear relationship; difference beyond expected tolerance (manufacturer-specific) is implausible
- Open circuit: signal near 0 V; short to battery: signal near battery voltage (≈12 V) — both are fault indications
Diagnostic algorithm
- Read and record DTC(s) and live data for both pedal tracks and throttle position with a diagnostic scan tool.
- Perform visual inspection of pedal connector and wiring for corrosion, bent pins, damage or water contamination.
- With key ON (engine OFF) measure reference voltage and ground at the pedal connector; confirm ~5V reference and good ground continuity to chassis/ECU.
- Monitor live voltages/signals for track 1 and track 2 while slowly operating the pedal; note ranges, linearity, and any dropouts or noise.
- If reference and ground are correct but track 2 is out of range or inconsistent, backprobe connector and wiggle harness to locate intermittent wiring faults.
- Check continuity between pedal connector and ECU connector for track 2, reference 5V and ground; repair any opens/shorts.
- If wiring and connectors test good, replace or bench-test the accelerator pedal assembly (compare track 1 vs track 2 behavior).
- After repair, clear codes and perform accelerator pedal calibration/relearn if required by manufacturer; re-check for return of code and verify normal throttle response.
- If faults persist after replacing pedal and repairing wiring, inspect ECU power/ground and consider ECU diagnosis or replacement as last resort.
Likely causes
- Dirty/corroded connector at pedal assembly or ECU
- Broken wire or high-resistance splice to sensor track 2
- Internal failure of pedal potentiometer (track 2)
- Loss of reference 5V or ground affecting sensor readings
Fault status
Status
Accelerator potentiometer track 2 fault — drive-by-wire potentiometer 2 signal implausible. Check pedal sensor, wiring, reference supply and grounding.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
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Code
P1222
CHRYSLER
P — Powertrain
Injector Control Circuit Intermittent
Views:
UK: 33
EN: 73
RU: 47
AI status
Completed
Completed
100%
Causes
- Open or short in accelerator pedal sensor (track 2) wiring
- Corroded, loose or damaged pedal connector or terminals
- Failed accelerator pedal position sensor (track 2) inside the pedal assembly
- Poor ground or 5V reference supply from the ECU
- Intermittent wiring harness damage (chafing, water intrusion)
- Software/ECU fault (rare)
Symptoms
- Check engine/warning light illuminated
- Reduced engine power / limp-home mode / limited throttle response
- Engine may not respond to accelerator pedal input or response is delayed
- Possible inconsistent throttle behavior or sudden surges when pressing pedal
What to check
- Retrieve freeze frame and live data with a capable scan tool (read both pedal tracks and throttle demand)
- Visually inspect accelerator pedal connector and wiring harness for damage, corrosion, or water entry
- Wiggle test: monitor track 2 signal while moving harness and pedal connector to look for intermittent changes
- Check for other related DTCs (throttle body, reference voltage, CAN bus)
- Measure reference voltage (typically ~5V) and ground at the pedal connector with key ON, engine OFF
Signal parameters
- Typical APP potentiometer signals: 0.5–4.5 V sweep across full pedal travel (varies by model)
- Track 1 and track 2 should move together and show a consistent linear relationship; difference beyond expected tolerance (manufacturer-specific) is implausible
- Open circuit: signal near 0 V; short to battery: signal near battery voltage (≈12 V) — both are fault indications
Diagnostic algorithm
- Read and record DTC(s) and live data for both pedal tracks and throttle position with a diagnostic scan tool.
- Perform visual inspection of pedal connector and wiring for corrosion, bent pins, damage or water contamination.
- With key ON (engine OFF) measure reference voltage and ground at the pedal connector; confirm ~5V reference and good ground continuity to chassis/ECU.
- Monitor live voltages/signals for track 1 and track 2 while slowly operating the pedal; note ranges, linearity, and any dropouts or noise.
- If reference and ground are correct but track 2 is out of range or inconsistent, backprobe connector and wiggle harness to locate intermittent wiring faults.
- Check continuity between pedal connector and ECU connector for track 2, reference 5V and ground; repair any opens/shorts.
- If wiring and connectors test good, replace or bench-test the accelerator pedal assembly (compare track 1 vs track 2 behavior).
- After repair, clear codes and perform accelerator pedal calibration/relearn if required by manufacturer; re-check for return of code and verify normal throttle response.
- If faults persist after replacing pedal and repairing wiring, inspect ECU power/ground and consider ECU diagnosis or replacement as last resort.
Likely causes
- Dirty/corroded connector at pedal assembly or ECU
- Broken wire or high-resistance splice to sensor track 2
- Internal failure of pedal potentiometer (track 2)
- Loss of reference 5V or ground affecting sensor readings
Fault status
Status
Accelerator potentiometer track 2 fault — drive-by-wire potentiometer 2 signal implausible. Check pedal sensor, wiring, reference supply and grounding.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
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Code
P1222
FIAT
P — Powertrain
Accelerator potentiometer track 2 fault | Drive-by-wire potentiometer 2 signal implausible
Views:
UK: 15
EN: 31
RU: 30
AI status
Completed
Completed
100%
Causes
- Open or short in accelerator pedal sensor (track 2) wiring
- Corroded, loose or damaged pedal connector or terminals
- Failed accelerator pedal position sensor (track 2) inside the pedal assembly
- Poor ground or 5V reference supply from the ECU
- Intermittent wiring harness damage (chafing, water intrusion)
- Software/ECU fault (rare)
Symptoms
- Check engine/warning light illuminated
- Reduced engine power / limp-home mode / limited throttle response
- Engine may not respond to accelerator pedal input or response is delayed
- Possible inconsistent throttle behavior or sudden surges when pressing pedal
What to check
- Retrieve freeze frame and live data with a capable scan tool (read both pedal tracks and throttle demand)
- Visually inspect accelerator pedal connector and wiring harness for damage, corrosion, or water entry
- Wiggle test: monitor track 2 signal while moving harness and pedal connector to look for intermittent changes
- Check for other related DTCs (throttle body, reference voltage, CAN bus)
- Measure reference voltage (typically ~5V) and ground at the pedal connector with key ON, engine OFF
Signal parameters
- Typical APP potentiometer signals: 0.5–4.5 V sweep across full pedal travel (varies by model)
- Track 1 and track 2 should move together and show a consistent linear relationship; difference beyond expected tolerance (manufacturer-specific) is implausible
- Open circuit: signal near 0 V; short to battery: signal near battery voltage (≈12 V) — both are fault indications
Diagnostic algorithm
- Read and record DTC(s) and live data for both pedal tracks and throttle position with a diagnostic scan tool.
- Perform visual inspection of pedal connector and wiring for corrosion, bent pins, damage or water contamination.
- With key ON (engine OFF) measure reference voltage and ground at the pedal connector; confirm ~5V reference and good ground continuity to chassis/ECU.
- Monitor live voltages/signals for track 1 and track 2 while slowly operating the pedal; note ranges, linearity, and any dropouts or noise.
- If reference and ground are correct but track 2 is out of range or inconsistent, backprobe connector and wiggle harness to locate intermittent wiring faults.
- Check continuity between pedal connector and ECU connector for track 2, reference 5V and ground; repair any opens/shorts.
- If wiring and connectors test good, replace or bench-test the accelerator pedal assembly (compare track 1 vs track 2 behavior).
- After repair, clear codes and perform accelerator pedal calibration/relearn if required by manufacturer; re-check for return of code and verify normal throttle response.
- If faults persist after replacing pedal and repairing wiring, inspect ECU power/ground and consider ECU diagnosis or replacement as last resort.
Likely causes
- Dirty/corroded connector at pedal assembly or ECU
- Broken wire or high-resistance splice to sensor track 2
- Internal failure of pedal potentiometer (track 2)
- Loss of reference 5V or ground affecting sensor readings
Fault status
Status
Accelerator potentiometer track 2 fault — drive-by-wire potentiometer 2 signal implausible. Check pedal sensor, wiring, reference supply and grounding.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
Similar codes
Repair manuals
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Code
P1222
FORD
P — Powertrain
Traction Control Output Circuit Malfunction
Views:
UK: 26
EN: 65
RU: 42
AI status
Completed
Completed
100%
Causes
- Open or short in accelerator pedal sensor (track 2) wiring
- Corroded, loose or damaged pedal connector or terminals
- Failed accelerator pedal position sensor (track 2) inside the pedal assembly
- Poor ground or 5V reference supply from the ECU
- Intermittent wiring harness damage (chafing, water intrusion)
- Software/ECU fault (rare)
Symptoms
- Check engine/warning light illuminated
- Reduced engine power / limp-home mode / limited throttle response
- Engine may not respond to accelerator pedal input or response is delayed
- Possible inconsistent throttle behavior or sudden surges when pressing pedal
What to check
- Retrieve freeze frame and live data with a capable scan tool (read both pedal tracks and throttle demand)
- Visually inspect accelerator pedal connector and wiring harness for damage, corrosion, or water entry
- Wiggle test: monitor track 2 signal while moving harness and pedal connector to look for intermittent changes
- Check for other related DTCs (throttle body, reference voltage, CAN bus)
- Measure reference voltage (typically ~5V) and ground at the pedal connector with key ON, engine OFF
Signal parameters
- Typical APP potentiometer signals: 0.5–4.5 V sweep across full pedal travel (varies by model)
- Track 1 and track 2 should move together and show a consistent linear relationship; difference beyond expected tolerance (manufacturer-specific) is implausible
- Open circuit: signal near 0 V; short to battery: signal near battery voltage (≈12 V) — both are fault indications
Diagnostic algorithm
- Read and record DTC(s) and live data for both pedal tracks and throttle position with a diagnostic scan tool.
- Perform visual inspection of pedal connector and wiring for corrosion, bent pins, damage or water contamination.
- With key ON (engine OFF) measure reference voltage and ground at the pedal connector; confirm ~5V reference and good ground continuity to chassis/ECU.
- Monitor live voltages/signals for track 1 and track 2 while slowly operating the pedal; note ranges, linearity, and any dropouts or noise.
- If reference and ground are correct but track 2 is out of range or inconsistent, backprobe connector and wiggle harness to locate intermittent wiring faults.
- Check continuity between pedal connector and ECU connector for track 2, reference 5V and ground; repair any opens/shorts.
- If wiring and connectors test good, replace or bench-test the accelerator pedal assembly (compare track 1 vs track 2 behavior).
- After repair, clear codes and perform accelerator pedal calibration/relearn if required by manufacturer; re-check for return of code and verify normal throttle response.
- If faults persist after replacing pedal and repairing wiring, inspect ECU power/ground and consider ECU diagnosis or replacement as last resort.
Likely causes
- Dirty/corroded connector at pedal assembly or ECU
- Broken wire or high-resistance splice to sensor track 2
- Internal failure of pedal potentiometer (track 2)
- Loss of reference 5V or ground affecting sensor readings
Fault status
Status
Accelerator potentiometer track 2 fault — drive-by-wire potentiometer 2 signal implausible. Check pedal sensor, wiring, reference supply and grounding.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
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Code
P1222
GM
P — Powertrain
Injector Control Circuit Intermittent
Views:
UK: 32
EN: 118
RU: 53
AI status
Completed
Completed
100%
Causes
- Open or short in accelerator pedal sensor (track 2) wiring
- Corroded, loose or damaged pedal connector or terminals
- Failed accelerator pedal position sensor (track 2) inside the pedal assembly
- Poor ground or 5V reference supply from the ECU
- Intermittent wiring harness damage (chafing, water intrusion)
- Software/ECU fault (rare)
Symptoms
- Check engine/warning light illuminated
- Reduced engine power / limp-home mode / limited throttle response
- Engine may not respond to accelerator pedal input or response is delayed
- Possible inconsistent throttle behavior or sudden surges when pressing pedal
What to check
- Retrieve freeze frame and live data with a capable scan tool (read both pedal tracks and throttle demand)
- Visually inspect accelerator pedal connector and wiring harness for damage, corrosion, or water entry
- Wiggle test: monitor track 2 signal while moving harness and pedal connector to look for intermittent changes
- Check for other related DTCs (throttle body, reference voltage, CAN bus)
- Measure reference voltage (typically ~5V) and ground at the pedal connector with key ON, engine OFF
Signal parameters
- Typical APP potentiometer signals: 0.5–4.5 V sweep across full pedal travel (varies by model)
- Track 1 and track 2 should move together and show a consistent linear relationship; difference beyond expected tolerance (manufacturer-specific) is implausible
- Open circuit: signal near 0 V; short to battery: signal near battery voltage (≈12 V) — both are fault indications
Diagnostic algorithm
- Read and record DTC(s) and live data for both pedal tracks and throttle position with a diagnostic scan tool.
- Perform visual inspection of pedal connector and wiring for corrosion, bent pins, damage or water contamination.
- With key ON (engine OFF) measure reference voltage and ground at the pedal connector; confirm ~5V reference and good ground continuity to chassis/ECU.
- Monitor live voltages/signals for track 1 and track 2 while slowly operating the pedal; note ranges, linearity, and any dropouts or noise.
- If reference and ground are correct but track 2 is out of range or inconsistent, backprobe connector and wiggle harness to locate intermittent wiring faults.
- Check continuity between pedal connector and ECU connector for track 2, reference 5V and ground; repair any opens/shorts.
- If wiring and connectors test good, replace or bench-test the accelerator pedal assembly (compare track 1 vs track 2 behavior).
- After repair, clear codes and perform accelerator pedal calibration/relearn if required by manufacturer; re-check for return of code and verify normal throttle response.
- If faults persist after replacing pedal and repairing wiring, inspect ECU power/ground and consider ECU diagnosis or replacement as last resort.
Likely causes
- Dirty/corroded connector at pedal assembly or ECU
- Broken wire or high-resistance splice to sensor track 2
- Internal failure of pedal potentiometer (track 2)
- Loss of reference 5V or ground affecting sensor readings
Fault status
Status
Accelerator potentiometer track 2 fault — drive-by-wire potentiometer 2 signal implausible. Check pedal sensor, wiring, reference supply and grounding.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
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Code
P1222
GMC
P — Powertrain
Injector Control Circuit Intermittent
Views:
UK: 28
EN: 68
RU: 42
AI status
Completed
Completed
100%
Causes
- Open or short in accelerator pedal sensor (track 2) wiring
- Corroded, loose or damaged pedal connector or terminals
- Failed accelerator pedal position sensor (track 2) inside the pedal assembly
- Poor ground or 5V reference supply from the ECU
- Intermittent wiring harness damage (chafing, water intrusion)
- Software/ECU fault (rare)
Symptoms
- Check engine/warning light illuminated
- Reduced engine power / limp-home mode / limited throttle response
- Engine may not respond to accelerator pedal input or response is delayed
- Possible inconsistent throttle behavior or sudden surges when pressing pedal
What to check
- Retrieve freeze frame and live data with a capable scan tool (read both pedal tracks and throttle demand)
- Visually inspect accelerator pedal connector and wiring harness for damage, corrosion, or water entry
- Wiggle test: monitor track 2 signal while moving harness and pedal connector to look for intermittent changes
- Check for other related DTCs (throttle body, reference voltage, CAN bus)
- Measure reference voltage (typically ~5V) and ground at the pedal connector with key ON, engine OFF
Signal parameters
- Typical APP potentiometer signals: 0.5–4.5 V sweep across full pedal travel (varies by model)
- Track 1 and track 2 should move together and show a consistent linear relationship; difference beyond expected tolerance (manufacturer-specific) is implausible
- Open circuit: signal near 0 V; short to battery: signal near battery voltage (≈12 V) — both are fault indications
Diagnostic algorithm
- Read and record DTC(s) and live data for both pedal tracks and throttle position with a diagnostic scan tool.
- Perform visual inspection of pedal connector and wiring for corrosion, bent pins, damage or water contamination.
- With key ON (engine OFF) measure reference voltage and ground at the pedal connector; confirm ~5V reference and good ground continuity to chassis/ECU.
- Monitor live voltages/signals for track 1 and track 2 while slowly operating the pedal; note ranges, linearity, and any dropouts or noise.
- If reference and ground are correct but track 2 is out of range or inconsistent, backprobe connector and wiggle harness to locate intermittent wiring faults.
- Check continuity between pedal connector and ECU connector for track 2, reference 5V and ground; repair any opens/shorts.
- If wiring and connectors test good, replace or bench-test the accelerator pedal assembly (compare track 1 vs track 2 behavior).
- After repair, clear codes and perform accelerator pedal calibration/relearn if required by manufacturer; re-check for return of code and verify normal throttle response.
- If faults persist after replacing pedal and repairing wiring, inspect ECU power/ground and consider ECU diagnosis or replacement as last resort.
Likely causes
- Dirty/corroded connector at pedal assembly or ECU
- Broken wire or high-resistance splice to sensor track 2
- Internal failure of pedal potentiometer (track 2)
- Loss of reference 5V or ground affecting sensor readings
Fault status
Status
Accelerator potentiometer track 2 fault — drive-by-wire potentiometer 2 signal implausible. Check pedal sensor, wiring, reference supply and grounding.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
Similar codes
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Code
P1222
HUMMER
P — Powertrain
Injector Control Circuit Intermittent
Views:
UK: 20
EN: 35
RU: 27
AI status
Completed
Completed
100%
Causes
- Open or short in accelerator pedal sensor (track 2) wiring
- Corroded, loose or damaged pedal connector or terminals
- Failed accelerator pedal position sensor (track 2) inside the pedal assembly
- Poor ground or 5V reference supply from the ECU
- Intermittent wiring harness damage (chafing, water intrusion)
- Software/ECU fault (rare)
Symptoms
- Check engine/warning light illuminated
- Reduced engine power / limp-home mode / limited throttle response
- Engine may not respond to accelerator pedal input or response is delayed
- Possible inconsistent throttle behavior or sudden surges when pressing pedal
What to check
- Retrieve freeze frame and live data with a capable scan tool (read both pedal tracks and throttle demand)
- Visually inspect accelerator pedal connector and wiring harness for damage, corrosion, or water entry
- Wiggle test: monitor track 2 signal while moving harness and pedal connector to look for intermittent changes
- Check for other related DTCs (throttle body, reference voltage, CAN bus)
- Measure reference voltage (typically ~5V) and ground at the pedal connector with key ON, engine OFF
Signal parameters
- Typical APP potentiometer signals: 0.5–4.5 V sweep across full pedal travel (varies by model)
- Track 1 and track 2 should move together and show a consistent linear relationship; difference beyond expected tolerance (manufacturer-specific) is implausible
- Open circuit: signal near 0 V; short to battery: signal near battery voltage (≈12 V) — both are fault indications
Diagnostic algorithm
- Read and record DTC(s) and live data for both pedal tracks and throttle position with a diagnostic scan tool.
- Perform visual inspection of pedal connector and wiring for corrosion, bent pins, damage or water contamination.
- With key ON (engine OFF) measure reference voltage and ground at the pedal connector; confirm ~5V reference and good ground continuity to chassis/ECU.
- Monitor live voltages/signals for track 1 and track 2 while slowly operating the pedal; note ranges, linearity, and any dropouts or noise.
- If reference and ground are correct but track 2 is out of range or inconsistent, backprobe connector and wiggle harness to locate intermittent wiring faults.
- Check continuity between pedal connector and ECU connector for track 2, reference 5V and ground; repair any opens/shorts.
- If wiring and connectors test good, replace or bench-test the accelerator pedal assembly (compare track 1 vs track 2 behavior).
- After repair, clear codes and perform accelerator pedal calibration/relearn if required by manufacturer; re-check for return of code and verify normal throttle response.
- If faults persist after replacing pedal and repairing wiring, inspect ECU power/ground and consider ECU diagnosis or replacement as last resort.
Likely causes
- Dirty/corroded connector at pedal assembly or ECU
- Broken wire or high-resistance splice to sensor track 2
- Internal failure of pedal potentiometer (track 2)
- Loss of reference 5V or ground affecting sensor readings
Fault status
Status
Accelerator potentiometer track 2 fault — drive-by-wire potentiometer 2 signal implausible. Check pedal sensor, wiring, reference supply and grounding.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
Similar codes
Repair manuals
Manual library for HUMMER
138
Browse 138 HUMMER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.
HUMMER
-
HUMMER: 2009
-
HUMMER: 2008
-
HUMMER: 2007
-
HUMMER: 2005
-
HUMMER: 2004
-
HUMMER: 2000
-
HUMMER: 1999
-
HUMMER: 1994
-
HUMMER: 1993
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Code
P1222
LAND ROVER
P — Powertrain
Pedal demand sensor circuit B low input
Views:
UK: 18
EN: 26
RU: 30
AI status
Completed
Completed
100%
Causes
- Open or short in accelerator pedal sensor (track 2) wiring
- Corroded, loose or damaged pedal connector or terminals
- Failed accelerator pedal position sensor (track 2) inside the pedal assembly
- Poor ground or 5V reference supply from the ECU
- Intermittent wiring harness damage (chafing, water intrusion)
- Software/ECU fault (rare)
Symptoms
- Check engine/warning light illuminated
- Reduced engine power / limp-home mode / limited throttle response
- Engine may not respond to accelerator pedal input or response is delayed
- Possible inconsistent throttle behavior or sudden surges when pressing pedal
What to check
- Retrieve freeze frame and live data with a capable scan tool (read both pedal tracks and throttle demand)
- Visually inspect accelerator pedal connector and wiring harness for damage, corrosion, or water entry
- Wiggle test: monitor track 2 signal while moving harness and pedal connector to look for intermittent changes
- Check for other related DTCs (throttle body, reference voltage, CAN bus)
- Measure reference voltage (typically ~5V) and ground at the pedal connector with key ON, engine OFF
Signal parameters
- Typical APP potentiometer signals: 0.5–4.5 V sweep across full pedal travel (varies by model)
- Track 1 and track 2 should move together and show a consistent linear relationship; difference beyond expected tolerance (manufacturer-specific) is implausible
- Open circuit: signal near 0 V; short to battery: signal near battery voltage (≈12 V) — both are fault indications
Diagnostic algorithm
- Read and record DTC(s) and live data for both pedal tracks and throttle position with a diagnostic scan tool.
- Perform visual inspection of pedal connector and wiring for corrosion, bent pins, damage or water contamination.
- With key ON (engine OFF) measure reference voltage and ground at the pedal connector; confirm ~5V reference and good ground continuity to chassis/ECU.
- Monitor live voltages/signals for track 1 and track 2 while slowly operating the pedal; note ranges, linearity, and any dropouts or noise.
- If reference and ground are correct but track 2 is out of range or inconsistent, backprobe connector and wiggle harness to locate intermittent wiring faults.
- Check continuity between pedal connector and ECU connector for track 2, reference 5V and ground; repair any opens/shorts.
- If wiring and connectors test good, replace or bench-test the accelerator pedal assembly (compare track 1 vs track 2 behavior).
- After repair, clear codes and perform accelerator pedal calibration/relearn if required by manufacturer; re-check for return of code and verify normal throttle response.
- If faults persist after replacing pedal and repairing wiring, inspect ECU power/ground and consider ECU diagnosis or replacement as last resort.
Likely causes
- Dirty/corroded connector at pedal assembly or ECU
- Broken wire or high-resistance splice to sensor track 2
- Internal failure of pedal potentiometer (track 2)
- Loss of reference 5V or ground affecting sensor readings
Fault status
Status
Accelerator potentiometer track 2 fault — drive-by-wire potentiometer 2 signal implausible. Check pedal sensor, wiring, reference supply and grounding.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
Similar codes
Repair manuals
Manual library for LAND ROVER
320
Browse 320 LAND ROVER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.
LAND ROVER
-
LAND ROVER: 2022
-
Defender
- 90
- 90
- 90 S
- 90 S
- 90 V8
- 90 V8
- 90 V8 Carpathian Edition
- 90 V8 Carpathian Edition
- 90 X
- 90 X
- 90 X-Dynamic HSE
- 90 X-Dynamic HSE
- 90 X-Dynamic S
- 90 X-Dynamic S
- 90 X-Dynamic SE
- 90 X-Dynamic SE
- 110
- 110
- 110 S
- 110 S
- 110 SE
- 110 SE
- 110 V8
- 110 V8
- 110 V8 Carpathian Edition
- 110 V8 Carpathian Edition
- 110 X
- 110 X
- 110 X-Dynamic SE
- 110 X-Dynamic SE
- 110 XS Edition
- 110 XS Edition
-
Discovery
- R-Dynamic HSE
- R-Dynamic HSE
- R-Dynamic S, 2.0L Eng VIN X · 2.0L Eng VIN X2022: Discovery R-Dynamic S
- R-Dynamic S, 2.0L Eng VIN X · 2.0L Eng VIN X2022: Discovery R-Dynamic S
- R-Dynamic S, 3.0L Eng VIN U · 3.0L Eng VIN U2022: Discovery R-Dynamic S
- R-Dynamic S, 3.0L Eng VIN U · 3.0L Eng VIN U2022: Discovery R-Dynamic S
- S
- S
-
Discovery Sport
-
Range Rover
- Autobiography, 4.4L Eng VIN 7 · 4.4L Eng VIN 72022: Range Rover Autobiography
- Autobiography, 4.4L Eng VIN 7 · 4.4L Eng VIN 72022: Range Rover Autobiography
- Autobiography, 5.0L Eng VIN E · 5.0L Eng VIN E2022: Range Rover Autobiography
- Autobiography, 5.0L Eng VIN E · 5.0L Eng VIN E2022: Range Rover Autobiography
- 2022 Range Rover Base
- 2022 Range Rover Base
- First Edition
- First Edition
- HSE Westminster, 3.0L Eng VIN U · 3.0L Eng VIN U2022: Range Rover HSE Westminster
- HSE Westminster, 3.0L Eng VIN U · 3.0L Eng VIN U2022: Range Rover HSE Westminster
- HSE Westminster, 5.0L Eng VIN E · 5.0L Eng VIN E2022: Range Rover HSE Westminster
- HSE Westminster, 5.0L Eng VIN E · 5.0L Eng VIN E2022: Range Rover HSE Westminster
- SE, 3.0L Eng VIN U · 3.0L Eng VIN U2022: Range Rover SE
- SE, 3.0L Eng VIN U · 3.0L Eng VIN U2022: Range Rover SE
- SE, 4.4L Eng VIN 7 · 4.4L Eng VIN 72022: Range Rover SE
- SE, 4.4L Eng VIN 7 · 4.4L Eng VIN 72022: Range Rover SE
- SV
- SV
- SVAutobiography
- SVAutobiography
- SVAutobiography Dynamic
- SVAutobiography Dynamic
- SVAutobiography Dynamic Blk.
- SVAutobiography Dynamic Blk.
-
Range Rover Evoque
-
Range Rover Velar
- R-Dynamic HSE
- R-Dynamic HSE
- R-Dynamic S, 2.0L Eng VIN X · 2.0L Eng VIN X2022: Range Rover Velar R-Dynamic S
- R-Dynamic S, 2.0L Eng VIN X · 2.0L Eng VIN X2022: Range Rover Velar R-Dynamic S
- R-Dynamic S, 3.0L Eng VIN U · 3.0L Eng VIN U2022: Range Rover Velar R-Dynamic S
- R-Dynamic S, 3.0L Eng VIN U · 3.0L Eng VIN U2022: Range Rover Velar R-Dynamic S
- S, 2.0L Eng VIN X · 2.0L Eng VIN X2022: Range Rover Velar S
- S, 2.0L Eng VIN X · 2.0L Eng VIN X2022: Range Rover Velar S
- S, 3.0L Eng VIN U · 3.0L Eng VIN U2022: Range Rover Velar S
- S, 3.0L Eng VIN U · 3.0L Eng VIN U2022: Range Rover Velar S
-
-
LAND ROVER: 2021
-
Discovery
- R-Dynamic HSE
- R-Dynamic HSE
- R-Dynamic S, 2.0L Eng VIN X · 2.0L Eng VIN X2021: Discovery R-Dynamic S
- R-Dynamic S, 2.0L Eng VIN X · 2.0L Eng VIN X2021: Discovery R-Dynamic S
- R-Dynamic S, 3.0L Eng VIN U · 3.0L Eng VIN U2021: Discovery R-Dynamic S
- R-Dynamic S, 3.0L Eng VIN U · 3.0L Eng VIN U2021: Discovery R-Dynamic S
- S
- S
-
Discovery Sport
-
Range Rover
- Autobiography, 2.0L Eng VIN Y · 2.0L Eng VIN Y2021: Range Rover Autobiography
- Autobiography, 2.0L Eng VIN Y · 2.0L Eng VIN Y2021: Range Rover Autobiography
- Autobiography Fifty Edition
- Autobiography Fifty Edition
- 2021 Range Rover Base
- 2021 Range Rover Base
- HSE, 2.0L Eng VIN Y · 2.0L Eng VIN Y2021: Range Rover HSE
- HSE, 2.0L Eng VIN Y · 2.0L Eng VIN Y2021: Range Rover HSE
- HSE, 3.0L Eng VIN K · 3.0L Eng VIN K2021: Range Rover HSE
- HSE, 3.0L Eng VIN K · 3.0L Eng VIN K2021: Range Rover HSE
- HSE Westminster, 3.0L Eng VIN U · 3.0L Eng VIN U2021: Range Rover HSE Westminster
- HSE Westminster, 3.0L Eng VIN U · 3.0L Eng VIN U2021: Range Rover HSE Westminster
- HSE Westminster, 5.0L Eng VIN E · 5.0L Eng VIN E2021: Range Rover HSE Westminster
- HSE Westminster, 5.0L Eng VIN E · 5.0L Eng VIN E2021: Range Rover HSE Westminster
- SVAutobiography
- SVAutobiography
- SVAutobiography Dynamic
- SVAutobiography Dynamic
- SVAutobiography Dynamic Blk.
- SVAutobiography Dynamic Blk.
-
Range Rover Evoque
-
Range Rover Sport
- Autobiography, 2.0L Eng VIN Y · 2.0L Eng VIN Y2021: Range Rover Sport Autobiography
- Autobiography, 2.0L Eng VIN Y · 2.0L Eng VIN Y2021: Range Rover Sport Autobiography
- Autobiography, 5.0L Eng VIN E · 5.0L Eng VIN E2021: Range Rover Sport Autobiography
- Autobiography, 5.0L Eng VIN E · 5.0L Eng VIN E2021: Range Rover Sport Autobiography
- Autobiography Dynamic, 2.0L Eng VIN Y · 2.0L Eng VIN Y2021: Range Rover Sport Autobiography Dynamic
- Autobiography Dynamic, 2.0L Eng VIN Y · 2.0L Eng VIN Y2021: Range Rover Sport Autobiography Dynamic
- Autobiography Dynamic, 5.0L Eng VIN E · 5.0L Eng VIN E2021: Range Rover Sport Autobiography Dynamic
- Autobiography Dynamic, 5.0L Eng VIN E · 5.0L Eng VIN E2021: Range Rover Sport Autobiography Dynamic
- HSE Dynamic
- HSE Dynamic
- HSE Silver Edition, 2.0L Eng VIN Y · 2.0L Eng VIN Y2021: Range Rover Sport HSE Silver Edition
- HSE Silver Edition, 2.0L Eng VIN Y · 2.0L Eng VIN Y2021: Range Rover Sport HSE Silver Edition
- HSE Silver Edition, 3.0L Eng VIN K · 3.0L Eng VIN K2021: Range Rover Sport HSE Silver Edition
- HSE Silver Edition, 3.0L Eng VIN K · 3.0L Eng VIN K2021: Range Rover Sport HSE Silver Edition
- HSE Silver Edition, 3.0L Eng VIN U · 3.0L Eng VIN U2021: Range Rover Sport HSE Silver Edition
- HSE Silver Edition, 3.0L Eng VIN U · 3.0L Eng VIN U2021: Range Rover Sport HSE Silver Edition
- HST
- HST
- SE
- SE
- SVR
- SVR
- SVR Carbon Edition
- SVR Carbon Edition
-
Range Rover Velar
- R-Dynamic HSE
- R-Dynamic HSE
- R-Dynamic S, 2.0L Eng VIN X · 2.0L Eng VIN X2021: Range Rover Velar R-Dynamic S
- R-Dynamic S, 2.0L Eng VIN X · 2.0L Eng VIN X2021: Range Rover Velar R-Dynamic S
- R-Dynamic S, 3.0L Eng VIN U · 3.0L Eng VIN U2021: Range Rover Velar R-Dynamic S
- R-Dynamic S, 3.0L Eng VIN U · 3.0L Eng VIN U2021: Range Rover Velar R-Dynamic S
- S, 2.0L Eng VIN X · 2.0L Eng VIN X2021: Range Rover Velar S
- S, 2.0L Eng VIN X · 2.0L Eng VIN X2021: Range Rover Velar S
- S, 3.0L Eng VIN U · 3.0L Eng VIN U2021: Range Rover Velar S
- S, 3.0L Eng VIN U · 3.0L Eng VIN U2021: Range Rover Velar S
-
LAND ROVER: 2020
-
Defender
- 90 First Edition
- 90 First Edition
- 110 First Edition
- 110 First Edition
- 110 HSE
- 110 HSE
- 110 S
- 110 S
- 110 SE
- 110 SE
- 110 X
- 110 X
- 110, 2.0L Eng VIN X · 2.0L Eng VIN X2020: Defender 110
- 110, 2.0L Eng VIN X · 2.0L Eng VIN X2020: Defender 110
- 110, 3.0L Eng VIN U · 3.0L Eng VIN U2020: Defender 110
- 110, 3.0L Eng VIN U · 3.0L Eng VIN U2020: Defender 110
-
Discovery
- HSE, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Discovery HSE
- HSE, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Discovery HSE
- HSE, 3.0L Eng VIN V · 3.0L Eng VIN V2020: Discovery HSE
- HSE, 3.0L Eng VIN V · 3.0L Eng VIN V2020: Discovery HSE
- HSE Luxury, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Discovery HSE Luxury
- HSE Luxury, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Discovery HSE Luxury
- HSE Luxury, 3.0L Eng VIN V · 3.0L Eng VIN V2020: Discovery HSE Luxury
- HSE Luxury, 3.0L Eng VIN V · 3.0L Eng VIN V2020: Discovery HSE Luxury
- Landmark
- Landmark
- SE, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Discovery SE
- SE, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Discovery SE
- SE, 3.0L Eng VIN V · 3.0L Eng VIN V2020: Discovery SE
- SE, 3.0L Eng VIN V · 3.0L Eng VIN V2020: Discovery SE
-
Range Rover
- Autobiography
- Autobiography
- Base, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Range Rover Base
- Base, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Range Rover Base
- Base, 3.0L Eng VIN U · 3.0L Eng VIN U2020: Range Rover Base
- Base, 3.0L Eng VIN U · 3.0L Eng VIN U2020: Range Rover Base
- HSE, 2.0L Eng VIN Y · 2.0L Eng VIN Y2020: Range Rover HSE
- HSE, 2.0L Eng VIN Y · 2.0L Eng VIN Y2020: Range Rover HSE
- HSE, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Range Rover HSE
- HSE, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Range Rover HSE
- HSE, 3.0L Eng VIN U · 3.0L Eng VIN U2020: Range Rover HSE
- HSE, 3.0L Eng VIN U · 3.0L Eng VIN U2020: Range Rover HSE
- HSE, 5.0L Eng VIN E · 5.0L Eng VIN E2020: Range Rover HSE
- HSE, 5.0L Eng VIN E · 5.0L Eng VIN E2020: Range Rover HSE
- SVAutobiography
- SVAutobiography
- SVAutobiography Dynamic
- SVAutobiography Dynamic
-
Range Rover Evoque
-
Range Rover Sport
- Autobiography Dynamic, 2.0L Eng VIN Y · 2.0L Eng VIN Y2020: Range Rover Sport Autobiography Dynamic
- Autobiography Dynamic, 2.0L Eng VIN Y · 2.0L Eng VIN Y2020: Range Rover Sport Autobiography Dynamic
- Autobiography Dynamic, 5.0L Eng VIN E · 5.0L Eng VIN E2020: Range Rover Sport Autobiography Dynamic
- Autobiography Dynamic, 5.0L Eng VIN E · 5.0L Eng VIN E2020: Range Rover Sport Autobiography Dynamic
- HSE, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Range Rover Sport HSE
- HSE, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Range Rover Sport HSE
- HSE, 3.0L Eng VIN U · 3.0L Eng VIN U2020: Range Rover Sport HSE
- HSE, 3.0L Eng VIN U · 3.0L Eng VIN U2020: Range Rover Sport HSE
- HSE, 5.0L Eng VIN E · 5.0L Eng VIN E2020: Range Rover Sport HSE
- HSE, 5.0L Eng VIN E · 5.0L Eng VIN E2020: Range Rover Sport HSE
- HSE Dynamic
- HSE Dynamic
- HSE PHEV
- HSE PHEV
- HST
- HST
- SE, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Range Rover Sport SE
- SE, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Range Rover Sport SE
- SE, 3.0L Eng VIN U · 3.0L Eng VIN U2020: Range Rover Sport SE
- SE, 3.0L Eng VIN U · 3.0L Eng VIN U2020: Range Rover Sport SE
- SVR
- SVR
-
Range Rover Velar
- R-Dynamic HSE
- R-Dynamic HSE
- R-Dynamic S, 2.0L Eng VIN X · 2.0L Eng VIN X2020: Range Rover Velar R-Dynamic S
- R-Dynamic S, 2.0L Eng VIN X · 2.0L Eng VIN X2020: Range Rover Velar R-Dynamic S
- R-Dynamic S, 3.0L Eng VIN V · 3.0L Eng VIN V2020: Range Rover Velar R-Dynamic S
- R-Dynamic S, 3.0L Eng VIN V · 3.0L Eng VIN V2020: Range Rover Velar R-Dynamic S
- S, 2.0L Eng VIN X · 2.0L Eng VIN X2020: Range Rover Velar S
- S, 2.0L Eng VIN X · 2.0L Eng VIN X2020: Range Rover Velar S
- S, 3.0L Eng VIN V · 3.0L Eng VIN V2020: Range Rover Velar S
- S, 3.0L Eng VIN V · 3.0L Eng VIN V2020: Range Rover Velar S
- SVAutobiography Dyn.
- SVAutobiography Dyn.
-
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Code
P1222
LINCOLN
P — Powertrain
Traction Control Output Circuit Malfunction
Views:
UK: 36
EN: 75
RU: 46
AI status
Completed
Completed
100%
Causes
- Open or short in accelerator pedal sensor (track 2) wiring
- Corroded, loose or damaged pedal connector or terminals
- Failed accelerator pedal position sensor (track 2) inside the pedal assembly
- Poor ground or 5V reference supply from the ECU
- Intermittent wiring harness damage (chafing, water intrusion)
- Software/ECU fault (rare)
Symptoms
- Check engine/warning light illuminated
- Reduced engine power / limp-home mode / limited throttle response
- Engine may not respond to accelerator pedal input or response is delayed
- Possible inconsistent throttle behavior or sudden surges when pressing pedal
What to check
- Retrieve freeze frame and live data with a capable scan tool (read both pedal tracks and throttle demand)
- Visually inspect accelerator pedal connector and wiring harness for damage, corrosion, or water entry
- Wiggle test: monitor track 2 signal while moving harness and pedal connector to look for intermittent changes
- Check for other related DTCs (throttle body, reference voltage, CAN bus)
- Measure reference voltage (typically ~5V) and ground at the pedal connector with key ON, engine OFF
Signal parameters
- Typical APP potentiometer signals: 0.5–4.5 V sweep across full pedal travel (varies by model)
- Track 1 and track 2 should move together and show a consistent linear relationship; difference beyond expected tolerance (manufacturer-specific) is implausible
- Open circuit: signal near 0 V; short to battery: signal near battery voltage (≈12 V) — both are fault indications
Diagnostic algorithm
- Read and record DTC(s) and live data for both pedal tracks and throttle position with a diagnostic scan tool.
- Perform visual inspection of pedal connector and wiring for corrosion, bent pins, damage or water contamination.
- With key ON (engine OFF) measure reference voltage and ground at the pedal connector; confirm ~5V reference and good ground continuity to chassis/ECU.
- Monitor live voltages/signals for track 1 and track 2 while slowly operating the pedal; note ranges, linearity, and any dropouts or noise.
- If reference and ground are correct but track 2 is out of range or inconsistent, backprobe connector and wiggle harness to locate intermittent wiring faults.
- Check continuity between pedal connector and ECU connector for track 2, reference 5V and ground; repair any opens/shorts.
- If wiring and connectors test good, replace or bench-test the accelerator pedal assembly (compare track 1 vs track 2 behavior).
- After repair, clear codes and perform accelerator pedal calibration/relearn if required by manufacturer; re-check for return of code and verify normal throttle response.
- If faults persist after replacing pedal and repairing wiring, inspect ECU power/ground and consider ECU diagnosis or replacement as last resort.
Likely causes
- Dirty/corroded connector at pedal assembly or ECU
- Broken wire or high-resistance splice to sensor track 2
- Internal failure of pedal potentiometer (track 2)
- Loss of reference 5V or ground affecting sensor readings
Fault status
Status
Accelerator potentiometer track 2 fault — drive-by-wire potentiometer 2 signal implausible. Check pedal sensor, wiring, reference supply and grounding.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
Similar codes
Repair manuals
Manual library for LINCOLN
166
Browse 166 LINCOLN manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.
LINCOLN
-
LINCOLN: 2024
-
LINCOLN: 2023
-
LINCOLN: 2022
-
LINCOLN: 2021
-
LINCOLN: 2020
-
Continental
- Base, AWD
- Base, FWD
- Black Label, 2.7L Eng VIN P · 2.7L Eng VIN P2020: Continental Black Label
- Black Label, 3.0L Eng VIN C · 3.0L Eng VIN C2020: Continental Black Label
- Livery, AWD
- Livery, FWD
- Reserve, 2.7L Eng VIN P, AWD
- Reserve, 2.7L Eng VIN P, FWD
- Reserve, 3.0L Eng VIN C · 3.0L Eng VIN C2020: Continental Reserve
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Code
P1222
MAZDA
P — Powertrain
Traction Control Output Circuit
Views:
UK: 34
EN: 66
RU: 45
AI status
Completed
Completed
100%
Causes
- Open or short in accelerator pedal sensor (track 2) wiring
- Corroded, loose or damaged pedal connector or terminals
- Failed accelerator pedal position sensor (track 2) inside the pedal assembly
- Poor ground or 5V reference supply from the ECU
- Intermittent wiring harness damage (chafing, water intrusion)
- Software/ECU fault (rare)
Symptoms
- Check engine/warning light illuminated
- Reduced engine power / limp-home mode / limited throttle response
- Engine may not respond to accelerator pedal input or response is delayed
- Possible inconsistent throttle behavior or sudden surges when pressing pedal
What to check
- Retrieve freeze frame and live data with a capable scan tool (read both pedal tracks and throttle demand)
- Visually inspect accelerator pedal connector and wiring harness for damage, corrosion, or water entry
- Wiggle test: monitor track 2 signal while moving harness and pedal connector to look for intermittent changes
- Check for other related DTCs (throttle body, reference voltage, CAN bus)
- Measure reference voltage (typically ~5V) and ground at the pedal connector with key ON, engine OFF
Signal parameters
- Typical APP potentiometer signals: 0.5–4.5 V sweep across full pedal travel (varies by model)
- Track 1 and track 2 should move together and show a consistent linear relationship; difference beyond expected tolerance (manufacturer-specific) is implausible
- Open circuit: signal near 0 V; short to battery: signal near battery voltage (≈12 V) — both are fault indications
Diagnostic algorithm
- Read and record DTC(s) and live data for both pedal tracks and throttle position with a diagnostic scan tool.
- Perform visual inspection of pedal connector and wiring for corrosion, bent pins, damage or water contamination.
- With key ON (engine OFF) measure reference voltage and ground at the pedal connector; confirm ~5V reference and good ground continuity to chassis/ECU.
- Monitor live voltages/signals for track 1 and track 2 while slowly operating the pedal; note ranges, linearity, and any dropouts or noise.
- If reference and ground are correct but track 2 is out of range or inconsistent, backprobe connector and wiggle harness to locate intermittent wiring faults.
- Check continuity between pedal connector and ECU connector for track 2, reference 5V and ground; repair any opens/shorts.
- If wiring and connectors test good, replace or bench-test the accelerator pedal assembly (compare track 1 vs track 2 behavior).
- After repair, clear codes and perform accelerator pedal calibration/relearn if required by manufacturer; re-check for return of code and verify normal throttle response.
- If faults persist after replacing pedal and repairing wiring, inspect ECU power/ground and consider ECU diagnosis or replacement as last resort.
Likely causes
- Dirty/corroded connector at pedal assembly or ECU
- Broken wire or high-resistance splice to sensor track 2
- Internal failure of pedal potentiometer (track 2)
- Loss of reference 5V or ground affecting sensor readings
Fault status
Status
Accelerator potentiometer track 2 fault — drive-by-wire potentiometer 2 signal implausible. Check pedal sensor, wiring, reference supply and grounding.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
Similar codes
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Code
P1222
MERCEDES-BENZ
P — Powertrain
IFI Accelerator Pedal Position Sensor R252
Views:
UK: 24
EN: 56
RU: 32
AI status
Completed
Completed
100%
Causes
- Open or short in accelerator pedal sensor (track 2) wiring
- Corroded, loose or damaged pedal connector or terminals
- Failed accelerator pedal position sensor (track 2) inside the pedal assembly
- Poor ground or 5V reference supply from the ECU
- Intermittent wiring harness damage (chafing, water intrusion)
- Software/ECU fault (rare)
Symptoms
- Check engine/warning light illuminated
- Reduced engine power / limp-home mode / limited throttle response
- Engine may not respond to accelerator pedal input or response is delayed
- Possible inconsistent throttle behavior or sudden surges when pressing pedal
What to check
- Retrieve freeze frame and live data with a capable scan tool (read both pedal tracks and throttle demand)
- Visually inspect accelerator pedal connector and wiring harness for damage, corrosion, or water entry
- Wiggle test: monitor track 2 signal while moving harness and pedal connector to look for intermittent changes
- Check for other related DTCs (throttle body, reference voltage, CAN bus)
- Measure reference voltage (typically ~5V) and ground at the pedal connector with key ON, engine OFF
Signal parameters
- Typical APP potentiometer signals: 0.5–4.5 V sweep across full pedal travel (varies by model)
- Track 1 and track 2 should move together and show a consistent linear relationship; difference beyond expected tolerance (manufacturer-specific) is implausible
- Open circuit: signal near 0 V; short to battery: signal near battery voltage (≈12 V) — both are fault indications
Diagnostic algorithm
- Read and record DTC(s) and live data for both pedal tracks and throttle position with a diagnostic scan tool.
- Perform visual inspection of pedal connector and wiring for corrosion, bent pins, damage or water contamination.
- With key ON (engine OFF) measure reference voltage and ground at the pedal connector; confirm ~5V reference and good ground continuity to chassis/ECU.
- Monitor live voltages/signals for track 1 and track 2 while slowly operating the pedal; note ranges, linearity, and any dropouts or noise.
- If reference and ground are correct but track 2 is out of range or inconsistent, backprobe connector and wiggle harness to locate intermittent wiring faults.
- Check continuity between pedal connector and ECU connector for track 2, reference 5V and ground; repair any opens/shorts.
- If wiring and connectors test good, replace or bench-test the accelerator pedal assembly (compare track 1 vs track 2 behavior).
- After repair, clear codes and perform accelerator pedal calibration/relearn if required by manufacturer; re-check for return of code and verify normal throttle response.
- If faults persist after replacing pedal and repairing wiring, inspect ECU power/ground and consider ECU diagnosis or replacement as last resort.
Likely causes
- Dirty/corroded connector at pedal assembly or ECU
- Broken wire or high-resistance splice to sensor track 2
- Internal failure of pedal potentiometer (track 2)
- Loss of reference 5V or ground affecting sensor readings
Fault status
Status
Accelerator potentiometer track 2 fault — drive-by-wire potentiometer 2 signal implausible. Check pedal sensor, wiring, reference supply and grounding.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
Similar codes
Repair manuals
Manual library for MERCEDES-BENZ
610
Browse 610 MERCEDES-BENZ manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.
MERCEDES-BENZ
-
MERCEDES-BENZ: 2023
-
C43 AMG
-
C63 S AMG
-
CLA35 AMG
-
CLA45 AMG
-
CLA250
-
CLS53 AMG
-
CLS450
-
E53 AMG
-
E350
-
EQB250+
-
EQB300
-
EQB350
-
EQE350
-
EQE350 SUV
-
EQE500
-
EQE500 SUV
-
EQE AMG
-
EQS450
-
EQS450 SUV
-
EQS580
-
EQS580 SUV
-
G63 4x4 Squared AMG
-
G63 AMG
-
G550
-
GLA35 AMG
-
GLA45 AMG
-
GLA250
-
GLB35 AMG
-
GLB250
-
GLC43 AMG
-
GLE63 S AMG
-
GLE350
-
GLE450
-
GLE580
-
GLS63 AMG
-
GLS450
-
GLS580
-
GT 43 AMG
-
GT 53 AMG
-
GT 63 AMG
-
GT 63 S AMG
-
Maybach GLS600
-
Maybach S580
-
Maybach S680
-
Metris
-
S500
-
S580
-
S580e
-
SL43 AMG
-
SL55 AMG
-
SL63 AMG
-
Sprinter 1500
-
Sprinter 2500
- Van Cargo, Eng CD 274.920
- Van Cargo, Eng CD 654.920, 4WD
- Van Cargo, Eng CD 654.920, RWD
- Van Cargo Extended, 4WD
- Van Cargo Extended, RWD
- Van Crew, Eng CD 274.920
- Van Crew, Eng CD 654.920, 4WD
- Van Crew, Eng CD 654.920, RWD
- Van Passenger, Eng CD 274.920
- Van Passenger, Eng CD 654.920, 4WD
- Van Passenger, Eng CD 654.920, RWD
-
Sprinter 3500
-
-
MERCEDES-BENZ: 2022
-
A220
-
C43 AMG
-
CLA35 AMG
-
CLA45 AMG
-
CLA250
-
CLS450
-
E53 AMG
-
E350
-
EQB300
-
EQB350
-
G63 4x4 Squared AMG
-
G63 AMG
-
G550
-
GLA35 AMG
-
GLA45 AMG
-
GLA250
-
GLB35 AMG
-
GLB250
-
GLC43 AMG
-
GLE53 AMG
-
GLE63 S AMG
-
GLE350
-
GLE450
-
GLE580
-
GLS63 AMG
-
GLS450
-
GLS580
-
GT 43 AMG
-
GT 53 AMG
-
Maybach GLS600
-
Maybach S580
-
Maybach S680
-
Metris
-
S500
-
S580
-
SL55 AMG
-
SL63 AMG
-
Sprinter 1500
-
Sprinter 2500
- Van Cargo, 2.0L Eng · 2.0L Eng2022: Sprinter 2500 Van Cargo
- Van Cargo, 2.1L Eng · 2.1L Eng2022: Sprinter 2500 Van Cargo
- Van Cargo, 3.0L Eng, 4WD
- Van Cargo, 3.0L Eng, RWD
- Van Cargo Extended, 2.1L Eng · 2.1L Eng2022: Sprinter 2500 Van Cargo Extended
- Van Cargo Extended, 3.0L Eng, 4WD
- Van Cargo Extended, 3.0L Eng, RWD
- Van Crew, 2.0L Eng · 2.0L Eng2022: Sprinter 2500 Van Crew
- Van Crew, 2.1L Eng · 2.1L Eng2022: Sprinter 2500 Van Crew
- Van Crew, 3.0L Eng, 4WD
- Van Crew, 3.0L Eng, RWD
- Van Passenger, 2.0L Eng · 2.0L Eng2022: Sprinter 2500 Van Passenger
- Van Passenger, 2.1L Eng · 2.1L Eng2022: Sprinter 2500 Van Passenger
- Van Passenger, 3.0L Eng, 4WD
- Van Passenger, 3.0L Eng, RWD
-
Sprinter 3500
- Van Cargo, 2.1L Eng · 2.1L Eng2022: Sprinter 3500 Van Cargo
- Van Cargo, 3.0L Eng · 3.0L Eng2022: Sprinter 3500 Van Cargo
- Van Cargo Extended, 2.1L Eng · 2.1L Eng2022: Sprinter 3500 Van Cargo Extended
- Van Cargo Extended, 3.0L Eng · 3.0L Eng2022: Sprinter 3500 Van Cargo Extended
- Van Crew, 2.1L Eng · 2.1L Eng2022: Sprinter 3500 Van Crew
- Van Crew, 3.0L Eng · 3.0L Eng2022: Sprinter 3500 Van Crew
-
Sprinter 3500XD
- 2D Cab Chassis, 2.1L Eng · 2.1L Eng2022: Sprinter 3500XD 2D Cab Chassis
- 2D Cab Chassis, 3.0L Eng · 3.0L Eng2022: Sprinter 3500XD 2D Cab Chassis
- 2D Cab Chassis Extended, 2.1L Eng · 2.1L Eng2022: Sprinter 3500XD 2D Cab Chassis Extended
- 2D Cab Chassis Extended, 3.0L Eng · 3.0L Eng2022: Sprinter 3500XD 2D Cab Chassis Extended
- Van Cargo, 2.1L Eng · 2.1L Eng2022: Sprinter 3500XD Van Cargo
- Van Cargo, 3.0L Eng, 4WD
- Van Cargo, 3.0L Eng, RWD
- Van Cargo Extended, 2.1L Eng · 2.1L Eng2022: Sprinter 3500XD Van Cargo Extended
- Van Cargo Extended, 3.0L Eng, 4WD
- Van Cargo Extended, 3.0L Eng, RWD
- Van Crew, 2.1L Eng · 2.1L Eng2022: Sprinter 3500XD Van Crew
- Van Crew, 3.0L Eng, 4WD
- Van Crew, 3.0L Eng, RWD
-
-
MERCEDES-BENZ: 2021
-
A35 AMG
-
A220
-
C43 AMG
-
C63 AMG
-
C63 S AMG
-
CLA35 AMG
-
CLA45 AMG
-
CLA250
-
CLS53 AMG
-
CLS450
-
E53 AMG
-
E350
-
G63 AMG
-
G550
-
GLA35 AMG
-
GLA45 AMG
-
GLA250
-
GLB35 AMG
-
GLB250
-
GLC43 AMG
-
GLC63 AMG
-
GLC63 S AMG
-
GLE53 AMG
-
GLE63 S AMG
-
GLE350
-
GLE450
-
GLE580
-
GLS63 AMG
-
GLS450
-
GLS580
-
GT 43 AMG
-
GT 53 AMG
-
GT 63 AMG
-
GT 63 S AMG
-
GT AMG
-
GT AMG Black Series
-
GT C AMG
-
Maybach GLS600
-
Maybach S580
-
Metris
-
S63 AMG
-
S500
-
S560
-
S580
-
Sprinter 1500
-
Sprinter 2500
- Van Cargo, 2.0L Eng · 2.0L Eng2021: Sprinter 2500 Van Cargo
- Van Cargo, 2.1L Eng · 2.1L Eng2021: Sprinter 2500 Van Cargo
- Van Cargo, 3.0L Eng, 4WD
- Van Cargo, 3.0L Eng, RWD
- Van Cargo Extended, 2.1L Eng · 2.1L Eng2021: Sprinter 2500 Van Cargo Extended
- Van Cargo Extended, 3.0L Eng, 4WD
- Van Cargo Extended, 3.0L Eng, RWD
- Van Crew, 2.0L Eng · 2.0L Eng2021: Sprinter 2500 Van Crew
- Van Crew, 2.1L Eng · 2.1L Eng2021: Sprinter 2500 Van Crew
- Van Crew, 3.0L Eng, 4WD
- Van Crew, 3.0L Eng, RWD
- Van Passenger, 2.0L Eng · 2.0L Eng2021: Sprinter 2500 Van Passenger
- Van Passenger, 2.1L Eng · 2.1L Eng2021: Sprinter 2500 Van Passenger
- Van Passenger, 3.0L Eng, 4WD
- Van Passenger, 3.0L Eng, RWD
-
Sprinter 3500
- Van Cargo, 2.1L Eng · 2.1L Eng2021: Sprinter 3500 Van Cargo
- Van Cargo, 3.0L Eng, 4WD
- Van Cargo, 3.0L Eng, RWD
- Van Cargo Extended, 2.1L Eng · 2.1L Eng2021: Sprinter 3500 Van Cargo Extended
- Van Cargo Extended, 3.0L Eng, 4WD
- Van Cargo Extended, 3.0L Eng, RWD
- Van Crew, 2.1L Eng · 2.1L Eng2021: Sprinter 3500 Van Crew
- Van Crew, 3.0L Eng, 4WD
- Van Crew, 3.0L Eng, RWD
-
Sprinter 3500XD
- 2D Cab Chassis, 2.1L Eng · 2.1L Eng2021: Sprinter 3500XD 2D Cab Chassis
- 2D Cab Chassis, 3.0L Eng · 3.0L Eng2021: Sprinter 3500XD 2D Cab Chassis
- 2D Cab Chassis Extended, 2.1L Eng · 2.1L Eng2021: Sprinter 3500XD 2D Cab Chassis Extended
- 2D Cab Chassis Extended, 3.0L Eng · 3.0L Eng2021: Sprinter 3500XD 2D Cab Chassis Extended
- Van Cargo, 2.1L Eng · 2.1L Eng2021: Sprinter 3500XD Van Cargo
- Van Cargo, 3.0L Eng, 4WD
- Van Cargo, 3.0L Eng, RWD
- Van Cargo Extended, 2.1L Eng · 2.1L Eng2021: Sprinter 3500XD Van Cargo Extended
- Van Cargo Extended, 3.0L Eng, 4WD
- Van Cargo Extended, 3.0L Eng, RWD
- Van Crew, 2.1L Eng · 2.1L Eng2021: Sprinter 3500XD Van Crew
- Van Crew, 3.0L Eng, 4WD
- Van Crew, 3.0L Eng, RWD
-
-
MERCEDES-BENZ: 2020
-
A35 AMG
-
C63 S AMG
-
CLA35 AMG
-
CLA45 AMG
-
CLS53 AMG
-
G63 AMG
-
GLC43 AMG
-
GLC63 AMG
-
GLC63 S AMG
-
GLC350e
-
GLE450
-
GLE580
-
GLS450
-
GLS580
-
GT 53 AMG
-
GT 63 AMG
-
GT 63 S AMG
-
GT C AMG
-
GT S AMG
-
Maybach S560
-
Maybach S650
-
S65 AMG
-
S560e
-
SL450
-
SL550
-
Sprinter 1500
-
Sprinter 2500
- Van Cargo, 2.0L Eng · 2.0L Eng2020: Sprinter 2500 Van Cargo
- Van Cargo, 2.0L Eng · 2.0L Eng2020: Sprinter 2500 Van Cargo
- Van Cargo, 2.1L Eng · 2.1L Eng2020: Sprinter 2500 Van Cargo
- Van Cargo, 2.1L Eng · 2.1L Eng2020: Sprinter 2500 Van Cargo
- Van Cargo, 3.0L Eng, 4WD
- Van Cargo, 3.0L Eng, 4WD
- Van Cargo, 3.0L Eng, RWD
- Van Cargo, 3.0L Eng, RWD
- Van Cargo Extended, 2.1L Eng · 2.1L Eng2020: Sprinter 2500 Van Cargo Extended
- Van Cargo Extended, 2.1L Eng · 2.1L Eng2020: Sprinter 2500 Van Cargo Extended
- Van Cargo Extended, 3.0L Eng, 4WD
- Van Cargo Extended, 3.0L Eng, 4WD
- Van Cargo Extended, 3.0L Eng, RWD
- Van Cargo Extended, 3.0L Eng, RWD
- Van Crew, 2.0L Eng · 2.0L Eng2020: Sprinter 2500 Van Crew
- Van Crew, 2.0L Eng · 2.0L Eng2020: Sprinter 2500 Van Crew
- Van Crew, 2.1L Eng · 2.1L Eng2020: Sprinter 2500 Van Crew
- Van Crew, 2.1L Eng · 2.1L Eng2020: Sprinter 2500 Van Crew
- Van Crew, 3.0L Eng, 4WD
- Van Crew, 3.0L Eng, 4WD
- Van Crew, 3.0L Eng, RWD
- Van Crew, 3.0L Eng, RWD
- Van Passenger, 2.0L Eng · 2.0L Eng2020: Sprinter 2500 Van Passenger
- Van Passenger, 2.0L Eng · 2.0L Eng2020: Sprinter 2500 Van Passenger
- Van Passenger, 2.1L Eng · 2.1L Eng2020: Sprinter 2500 Van Passenger
- Van Passenger, 2.1L Eng · 2.1L Eng2020: Sprinter 2500 Van Passenger
- Van Passenger, 3.0L Eng, 4WD
- Van Passenger, 3.0L Eng, 4WD
- Van Passenger, 3.0L Eng, RWD
- Van Passenger, 3.0L Eng, RWD
-
Sprinter 3500
- Van Cargo, 2.1L Eng · 2.1L Eng2020: Sprinter 3500 Van Cargo
- Van Cargo, 2.1L Eng · 2.1L Eng2020: Sprinter 3500 Van Cargo
- Van Cargo, 3.0L Eng, 4WD
- Van Cargo, 3.0L Eng, 4WD
- Van Cargo, 3.0L Eng, RWD
- Van Cargo, 3.0L Eng, RWD
- Van Cargo Extended, 2.1L Eng · 2.1L Eng2020: Sprinter 3500 Van Cargo Extended
- Van Cargo Extended, 2.1L Eng · 2.1L Eng2020: Sprinter 3500 Van Cargo Extended
- Van Cargo Extended, 3.0L Eng, 4WD
- Van Cargo Extended, 3.0L Eng, 4WD
- Van Cargo Extended, 3.0L Eng, RWD
- Van Cargo Extended, 3.0L Eng, RWD
- Van Crew, 2.1L Eng · 2.1L Eng2020: Sprinter 3500 Van Crew
- Van Crew, 2.1L Eng · 2.1L Eng2020: Sprinter 3500 Van Crew
- Van Crew, 3.0L Eng, 4WD
- Van Crew, 3.0L Eng, 4WD
- Van Crew, 3.0L Eng, RWD
- Van Crew, 3.0L Eng, RWD
-
Sprinter 3500XD
- 2D Cab Chassis, 2.1L Eng · 2.1L Eng2020: Sprinter 3500XD 2D Cab Chassis
- 2D Cab Chassis, 2.1L Eng · 2.1L Eng2020: Sprinter 3500XD 2D Cab Chassis
- 2D Cab Chassis, 3.0L Eng · 3.0L Eng2020: Sprinter 3500XD 2D Cab Chassis
- 2D Cab Chassis, 3.0L Eng · 3.0L Eng2020: Sprinter 3500XD 2D Cab Chassis
- 2D Cab Chassis Extended, 2.1L Eng · 2.1L Eng2020: Sprinter 3500XD 2D Cab Chassis Extended
- 2D Cab Chassis Extended, 2.1L Eng · 2.1L Eng2020: Sprinter 3500XD 2D Cab Chassis Extended
- 2D Cab Chassis Extended, 3.0L Eng · 3.0L Eng2020: Sprinter 3500XD 2D Cab Chassis Extended
- 2D Cab Chassis Extended, 3.0L Eng · 3.0L Eng2020: Sprinter 3500XD 2D Cab Chassis Extended
- Van Cargo, 2.1L Eng · 2.1L Eng2020: Sprinter 3500XD Van Cargo
- Van Cargo, 2.1L Eng · 2.1L Eng2020: Sprinter 3500XD Van Cargo
- Van Cargo, 3.0L Eng, 4WD
- Van Cargo, 3.0L Eng, 4WD
- Van Cargo, 3.0L Eng, RWD
- Van Cargo, 3.0L Eng, RWD
- Van Cargo Extended, 2.1L Eng · 2.1L Eng2020: Sprinter 3500XD Van Cargo Extended
- Van Cargo Extended, 2.1L Eng · 2.1L Eng2020: Sprinter 3500XD Van Cargo Extended
- Van Cargo Extended, 3.0L Eng, 4WD
- Van Cargo Extended, 3.0L Eng, 4WD
- Van Cargo Extended, 3.0L Eng, RWD
- Van Cargo Extended, 3.0L Eng, RWD
- Van Crew, 2.1L Eng · 2.1L Eng2020: Sprinter 3500XD Van Crew
- Van Crew, 2.1L Eng · 2.1L Eng2020: Sprinter 3500XD Van Crew
- Van Crew, 3.0L Eng, 4WD
- Van Crew, 3.0L Eng, 4WD
- Van Crew, 3.0L Eng, RWD
- Van Crew, 3.0L Eng, RWD
-
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Was this AI description helpful?
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Code
P1222
MERCURY
P — Powertrain
Traction Control Output Circuit Malfunction
Views:
UK: 36
EN: 70
RU: 45
AI status
Completed
Completed
100%
Causes
- Open or short in accelerator pedal sensor (track 2) wiring
- Corroded, loose or damaged pedal connector or terminals
- Failed accelerator pedal position sensor (track 2) inside the pedal assembly
- Poor ground or 5V reference supply from the ECU
- Intermittent wiring harness damage (chafing, water intrusion)
- Software/ECU fault (rare)
Symptoms
- Check engine/warning light illuminated
- Reduced engine power / limp-home mode / limited throttle response
- Engine may not respond to accelerator pedal input or response is delayed
- Possible inconsistent throttle behavior or sudden surges when pressing pedal
What to check
- Retrieve freeze frame and live data with a capable scan tool (read both pedal tracks and throttle demand)
- Visually inspect accelerator pedal connector and wiring harness for damage, corrosion, or water entry
- Wiggle test: monitor track 2 signal while moving harness and pedal connector to look for intermittent changes
- Check for other related DTCs (throttle body, reference voltage, CAN bus)
- Measure reference voltage (typically ~5V) and ground at the pedal connector with key ON, engine OFF
Signal parameters
- Typical APP potentiometer signals: 0.5–4.5 V sweep across full pedal travel (varies by model)
- Track 1 and track 2 should move together and show a consistent linear relationship; difference beyond expected tolerance (manufacturer-specific) is implausible
- Open circuit: signal near 0 V; short to battery: signal near battery voltage (≈12 V) — both are fault indications
Diagnostic algorithm
- Read and record DTC(s) and live data for both pedal tracks and throttle position with a diagnostic scan tool.
- Perform visual inspection of pedal connector and wiring for corrosion, bent pins, damage or water contamination.
- With key ON (engine OFF) measure reference voltage and ground at the pedal connector; confirm ~5V reference and good ground continuity to chassis/ECU.
- Monitor live voltages/signals for track 1 and track 2 while slowly operating the pedal; note ranges, linearity, and any dropouts or noise.
- If reference and ground are correct but track 2 is out of range or inconsistent, backprobe connector and wiggle harness to locate intermittent wiring faults.
- Check continuity between pedal connector and ECU connector for track 2, reference 5V and ground; repair any opens/shorts.
- If wiring and connectors test good, replace or bench-test the accelerator pedal assembly (compare track 1 vs track 2 behavior).
- After repair, clear codes and perform accelerator pedal calibration/relearn if required by manufacturer; re-check for return of code and verify normal throttle response.
- If faults persist after replacing pedal and repairing wiring, inspect ECU power/ground and consider ECU diagnosis or replacement as last resort.
Likely causes
- Dirty/corroded connector at pedal assembly or ECU
- Broken wire or high-resistance splice to sensor track 2
- Internal failure of pedal potentiometer (track 2)
- Loss of reference 5V or ground affecting sensor readings
Fault status
Status
Accelerator potentiometer track 2 fault — drive-by-wire potentiometer 2 signal implausible. Check pedal sensor, wiring, reference supply and grounding.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
Similar codes
Repair manuals
Manual library for MERCURY
296
Browse 296 MERCURY manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.
MERCURY
-
MERCURY: 2011
-
MERCURY: 2010
-
Mountaineer
-
MERCURY: 2009
-
Mountaineer
-
MERCURY: 2008
-
Mountaineer
-
MERCURY: 2007
-
Montego
-
Monterey
-
Mountaineer
-
MERCURY: 2006
-
Montego
-
Monterey
-
Mountaineer
-
MERCURY: 2005
-
Grand Marquis
-
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-
Montego
-
Monterey
-
Mountaineer
-
-
MERCURY: 2004
-
Marauder
-
Monterey
-
Mountaineer
-
MERCURY: 2003
-
Marauder
-
Mountaineer
-
MERCURY: 2002
-
Cougar
-
Mountaineer
-
Sable
-
Villager
-
-
MERCURY: 2001
-
Mountaineer
-
Sable
- GS, 4D Sedan, 3.0 2, 4F50N
- GS, 4D Sedan, 3.0 2, AX4S
- GS, 4D Sedan, 3.0 S
- GS, 4D Sedan, 3.0 U, 4F50N
- GS, 4D Sedan, 3.0 U, AX4S
- GS, 4D Wagon, 3.0 2, 4F50N
- GS, 4D Wagon, 3.0 2, AX4S
- GS, 4D Wagon, 3.0 U, 4F50N
- GS, 4D Wagon, 3.0 U, AX4S
- LS, 4D Sedan, 3.0 2
- LS, 4D Sedan, 3.0 S
- LS, 4D Sedan, 3.0 U, 4F50N
- LS, 4D Sedan, 3.0 U, AX4S
- LS, 4D Wagon, 3.0 S
- LS, 4D Wagon, 3.0 U, 4F50N
- LS, 4D Wagon, 3.0 U, AX4S
-
Villager
-
MERCURY: 2000
-
Cougar
-
Mountaineer
-
Villager
-
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Code
P1222
MINI
P — Powertrain
Accelerator pedal position (APP) sensor 2 - low input
Views:
UK: 15
EN: 23
RU: 27
AI status
Completed
Completed
100%
Causes
- Open or short in accelerator pedal sensor (track 2) wiring
- Corroded, loose or damaged pedal connector or terminals
- Failed accelerator pedal position sensor (track 2) inside the pedal assembly
- Poor ground or 5V reference supply from the ECU
- Intermittent wiring harness damage (chafing, water intrusion)
- Software/ECU fault (rare)
Symptoms
- Check engine/warning light illuminated
- Reduced engine power / limp-home mode / limited throttle response
- Engine may not respond to accelerator pedal input or response is delayed
- Possible inconsistent throttle behavior or sudden surges when pressing pedal
What to check
- Retrieve freeze frame and live data with a capable scan tool (read both pedal tracks and throttle demand)
- Visually inspect accelerator pedal connector and wiring harness for damage, corrosion, or water entry
- Wiggle test: monitor track 2 signal while moving harness and pedal connector to look for intermittent changes
- Check for other related DTCs (throttle body, reference voltage, CAN bus)
- Measure reference voltage (typically ~5V) and ground at the pedal connector with key ON, engine OFF
Signal parameters
- Typical APP potentiometer signals: 0.5–4.5 V sweep across full pedal travel (varies by model)
- Track 1 and track 2 should move together and show a consistent linear relationship; difference beyond expected tolerance (manufacturer-specific) is implausible
- Open circuit: signal near 0 V; short to battery: signal near battery voltage (≈12 V) — both are fault indications
Diagnostic algorithm
- Read and record DTC(s) and live data for both pedal tracks and throttle position with a diagnostic scan tool.
- Perform visual inspection of pedal connector and wiring for corrosion, bent pins, damage or water contamination.
- With key ON (engine OFF) measure reference voltage and ground at the pedal connector; confirm ~5V reference and good ground continuity to chassis/ECU.
- Monitor live voltages/signals for track 1 and track 2 while slowly operating the pedal; note ranges, linearity, and any dropouts or noise.
- If reference and ground are correct but track 2 is out of range or inconsistent, backprobe connector and wiggle harness to locate intermittent wiring faults.
- Check continuity between pedal connector and ECU connector for track 2, reference 5V and ground; repair any opens/shorts.
- If wiring and connectors test good, replace or bench-test the accelerator pedal assembly (compare track 1 vs track 2 behavior).
- After repair, clear codes and perform accelerator pedal calibration/relearn if required by manufacturer; re-check for return of code and verify normal throttle response.
- If faults persist after replacing pedal and repairing wiring, inspect ECU power/ground and consider ECU diagnosis or replacement as last resort.
Likely causes
- Dirty/corroded connector at pedal assembly or ECU
- Broken wire or high-resistance splice to sensor track 2
- Internal failure of pedal potentiometer (track 2)
- Loss of reference 5V or ground affecting sensor readings
Fault status
Status
Accelerator potentiometer track 2 fault — drive-by-wire potentiometer 2 signal implausible. Check pedal sensor, wiring, reference supply and grounding.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
Similar codes
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Code
P1222
MITSUBISHI
P — Powertrain
ETV motor
Views:
UK: 21
EN: 34
RU: 28
AI status
Completed
Completed
100%
Causes
- Open or short in accelerator pedal sensor (track 2) wiring
- Corroded, loose or damaged pedal connector or terminals
- Failed accelerator pedal position sensor (track 2) inside the pedal assembly
- Poor ground or 5V reference supply from the ECU
- Intermittent wiring harness damage (chafing, water intrusion)
- Software/ECU fault (rare)
Symptoms
- Check engine/warning light illuminated
- Reduced engine power / limp-home mode / limited throttle response
- Engine may not respond to accelerator pedal input or response is delayed
- Possible inconsistent throttle behavior or sudden surges when pressing pedal
What to check
- Retrieve freeze frame and live data with a capable scan tool (read both pedal tracks and throttle demand)
- Visually inspect accelerator pedal connector and wiring harness for damage, corrosion, or water entry
- Wiggle test: monitor track 2 signal while moving harness and pedal connector to look for intermittent changes
- Check for other related DTCs (throttle body, reference voltage, CAN bus)
- Measure reference voltage (typically ~5V) and ground at the pedal connector with key ON, engine OFF
Signal parameters
- Typical APP potentiometer signals: 0.5–4.5 V sweep across full pedal travel (varies by model)
- Track 1 and track 2 should move together and show a consistent linear relationship; difference beyond expected tolerance (manufacturer-specific) is implausible
- Open circuit: signal near 0 V; short to battery: signal near battery voltage (≈12 V) — both are fault indications
Diagnostic algorithm
- Read and record DTC(s) and live data for both pedal tracks and throttle position with a diagnostic scan tool.
- Perform visual inspection of pedal connector and wiring for corrosion, bent pins, damage or water contamination.
- With key ON (engine OFF) measure reference voltage and ground at the pedal connector; confirm ~5V reference and good ground continuity to chassis/ECU.
- Monitor live voltages/signals for track 1 and track 2 while slowly operating the pedal; note ranges, linearity, and any dropouts or noise.
- If reference and ground are correct but track 2 is out of range or inconsistent, backprobe connector and wiggle harness to locate intermittent wiring faults.
- Check continuity between pedal connector and ECU connector for track 2, reference 5V and ground; repair any opens/shorts.
- If wiring and connectors test good, replace or bench-test the accelerator pedal assembly (compare track 1 vs track 2 behavior).
- After repair, clear codes and perform accelerator pedal calibration/relearn if required by manufacturer; re-check for return of code and verify normal throttle response.
- If faults persist after replacing pedal and repairing wiring, inspect ECU power/ground and consider ECU diagnosis or replacement as last resort.
Likely causes
- Dirty/corroded connector at pedal assembly or ECU
- Broken wire or high-resistance splice to sensor track 2
- Internal failure of pedal potentiometer (track 2)
- Loss of reference 5V or ground affecting sensor readings
Fault status
Status
Accelerator potentiometer track 2 fault — drive-by-wire potentiometer 2 signal implausible. Check pedal sensor, wiring, reference supply and grounding.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
Similar codes
Repair manuals
Manual library for MITSUBISHI
406
Browse 406 MITSUBISHI manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.
MITSUBISHI
-
MITSUBISHI: 2024
-
Outlander
- Black Edition, AWD
- Black Edition, AWD
- Black Edition, FWD
- Black Edition, FWD
- ES, AWD
- ES, AWD
- ES, FWD
- ES, FWD
- Platinum Edition
- Platinum Edition
- SE, AWD
- SE, AWD
- SE, FWD
- SE, FWD
- SEL, AWD
- SEL, AWD
- SEL, FWD
- SEL, FWD
- SEL Black Edition, AWD
- SEL Black Edition, AWD
- SEL Black Edition, FWD
- SEL Black Edition, FWD
-
Outlander PHEV
-
MITSUBISHI: 2023
-
Mirage
-
Mirage G4
-
Outlander
- 40th Anniversary
- 40th Anniversary
- Black Edition, AWD
- Black Edition, AWD
- Black Edition, FWD
- Black Edition, FWD
- ES, AWD
- ES, AWD
- ES, FWD
- ES, FWD
- Ralliart
- Ralliart
- SE, AWD
- SE, AWD
- SE, FWD
- SE, FWD
- SEL, AWD
- SEL, AWD
- SEL, FWD
- SEL, FWD
- SEL Black Edition, AWD
- SEL Black Edition, AWD
- SEL Black Edition, FWD
- SEL Black Edition, FWD
- SE Special Edition, AWD
- SE Special Edition, AWD
- SE Special Edition, FWD
- SE Special Edition, FWD
-
Outlander PHEV
-
MITSUBISHI: 2022
-
Eclipse Cross
- ES, AWD
- ES, AWD
- ES, FWD
- ES, FWD
- LE, AWD
- LE, AWD
- LE, FWD
- LE, FWD
- SE, AWD
- SE, AWD
- SE, FWD
- SE, FWD
- SEL, AWD
- SEL, AWD
- SEL, FWD
- SEL, FWD
- SEL Special Edition, AWD
- SEL Special Edition, AWD
- SEL Special Edition, FWD
- SEL Special Edition, FWD
- SE Special Edition, AWD
- SE Special Edition, AWD
- SE Special Edition, FWD
- SE Special Edition, FWD
-
-
MITSUBISHI: 2021
-
MITSUBISHI: 2020
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Code
P1222
OLDSMOBILE
P — Powertrain
Injector Control Circuit Intermittent
Views:
UK: 29
EN: 66
RU: 45
AI status
Completed
Completed
100%
Causes
- Open or short in accelerator pedal sensor (track 2) wiring
- Corroded, loose or damaged pedal connector or terminals
- Failed accelerator pedal position sensor (track 2) inside the pedal assembly
- Poor ground or 5V reference supply from the ECU
- Intermittent wiring harness damage (chafing, water intrusion)
- Software/ECU fault (rare)
Symptoms
- Check engine/warning light illuminated
- Reduced engine power / limp-home mode / limited throttle response
- Engine may not respond to accelerator pedal input or response is delayed
- Possible inconsistent throttle behavior or sudden surges when pressing pedal
What to check
- Retrieve freeze frame and live data with a capable scan tool (read both pedal tracks and throttle demand)
- Visually inspect accelerator pedal connector and wiring harness for damage, corrosion, or water entry
- Wiggle test: monitor track 2 signal while moving harness and pedal connector to look for intermittent changes
- Check for other related DTCs (throttle body, reference voltage, CAN bus)
- Measure reference voltage (typically ~5V) and ground at the pedal connector with key ON, engine OFF
Signal parameters
- Typical APP potentiometer signals: 0.5–4.5 V sweep across full pedal travel (varies by model)
- Track 1 and track 2 should move together and show a consistent linear relationship; difference beyond expected tolerance (manufacturer-specific) is implausible
- Open circuit: signal near 0 V; short to battery: signal near battery voltage (≈12 V) — both are fault indications
Diagnostic algorithm
- Read and record DTC(s) and live data for both pedal tracks and throttle position with a diagnostic scan tool.
- Perform visual inspection of pedal connector and wiring for corrosion, bent pins, damage or water contamination.
- With key ON (engine OFF) measure reference voltage and ground at the pedal connector; confirm ~5V reference and good ground continuity to chassis/ECU.
- Monitor live voltages/signals for track 1 and track 2 while slowly operating the pedal; note ranges, linearity, and any dropouts or noise.
- If reference and ground are correct but track 2 is out of range or inconsistent, backprobe connector and wiggle harness to locate intermittent wiring faults.
- Check continuity between pedal connector and ECU connector for track 2, reference 5V and ground; repair any opens/shorts.
- If wiring and connectors test good, replace or bench-test the accelerator pedal assembly (compare track 1 vs track 2 behavior).
- After repair, clear codes and perform accelerator pedal calibration/relearn if required by manufacturer; re-check for return of code and verify normal throttle response.
- If faults persist after replacing pedal and repairing wiring, inspect ECU power/ground and consider ECU diagnosis or replacement as last resort.
Likely causes
- Dirty/corroded connector at pedal assembly or ECU
- Broken wire or high-resistance splice to sensor track 2
- Internal failure of pedal potentiometer (track 2)
- Loss of reference 5V or ground affecting sensor readings
Fault status
Status
Accelerator potentiometer track 2 fault — drive-by-wire potentiometer 2 signal implausible. Check pedal sensor, wiring, reference supply and grounding.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
Similar codes
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Code
P1222
Other
P — Powertrain
Traction Control Output Circuit Malfunction
Views:
UK: 29
EN: 68
RU: 40
AI status
Completed
Completed
100%
Causes
- Open or short in accelerator pedal sensor (track 2) wiring
- Corroded, loose or damaged pedal connector or terminals
- Failed accelerator pedal position sensor (track 2) inside the pedal assembly
- Poor ground or 5V reference supply from the ECU
- Intermittent wiring harness damage (chafing, water intrusion)
- Software/ECU fault (rare)
Symptoms
- Check engine/warning light illuminated
- Reduced engine power / limp-home mode / limited throttle response
- Engine may not respond to accelerator pedal input or response is delayed
- Possible inconsistent throttle behavior or sudden surges when pressing pedal
What to check
- Retrieve freeze frame and live data with a capable scan tool (read both pedal tracks and throttle demand)
- Visually inspect accelerator pedal connector and wiring harness for damage, corrosion, or water entry
- Wiggle test: monitor track 2 signal while moving harness and pedal connector to look for intermittent changes
- Check for other related DTCs (throttle body, reference voltage, CAN bus)
- Measure reference voltage (typically ~5V) and ground at the pedal connector with key ON, engine OFF
Signal parameters
- Typical APP potentiometer signals: 0.5–4.5 V sweep across full pedal travel (varies by model)
- Track 1 and track 2 should move together and show a consistent linear relationship; difference beyond expected tolerance (manufacturer-specific) is implausible
- Open circuit: signal near 0 V; short to battery: signal near battery voltage (≈12 V) — both are fault indications
Diagnostic algorithm
- Read and record DTC(s) and live data for both pedal tracks and throttle position with a diagnostic scan tool.
- Perform visual inspection of pedal connector and wiring for corrosion, bent pins, damage or water contamination.
- With key ON (engine OFF) measure reference voltage and ground at the pedal connector; confirm ~5V reference and good ground continuity to chassis/ECU.
- Monitor live voltages/signals for track 1 and track 2 while slowly operating the pedal; note ranges, linearity, and any dropouts or noise.
- If reference and ground are correct but track 2 is out of range or inconsistent, backprobe connector and wiggle harness to locate intermittent wiring faults.
- Check continuity between pedal connector and ECU connector for track 2, reference 5V and ground; repair any opens/shorts.
- If wiring and connectors test good, replace or bench-test the accelerator pedal assembly (compare track 1 vs track 2 behavior).
- After repair, clear codes and perform accelerator pedal calibration/relearn if required by manufacturer; re-check for return of code and verify normal throttle response.
- If faults persist after replacing pedal and repairing wiring, inspect ECU power/ground and consider ECU diagnosis or replacement as last resort.
Likely causes
- Dirty/corroded connector at pedal assembly or ECU
- Broken wire or high-resistance splice to sensor track 2
- Internal failure of pedal potentiometer (track 2)
- Loss of reference 5V or ground affecting sensor readings
Fault status
Status
Accelerator potentiometer track 2 fault — drive-by-wire potentiometer 2 signal implausible. Check pedal sensor, wiring, reference supply and grounding.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
Similar codes
Repair manuals
Brands with available manuals
6,149
The library contains 6,149 repair and diagnostic manuals. Choose a brand to open the full manual tree by year, model and trim.
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Code
P1222
SATURN
P — Powertrain
Injector Control Circuit Intermittent
Views:
UK: 36
EN: 76
RU: 50
AI status
Completed
Completed
100%
Causes
- Open or short in accelerator pedal sensor (track 2) wiring
- Corroded, loose or damaged pedal connector or terminals
- Failed accelerator pedal position sensor (track 2) inside the pedal assembly
- Poor ground or 5V reference supply from the ECU
- Intermittent wiring harness damage (chafing, water intrusion)
- Software/ECU fault (rare)
Symptoms
- Check engine/warning light illuminated
- Reduced engine power / limp-home mode / limited throttle response
- Engine may not respond to accelerator pedal input or response is delayed
- Possible inconsistent throttle behavior or sudden surges when pressing pedal
What to check
- Retrieve freeze frame and live data with a capable scan tool (read both pedal tracks and throttle demand)
- Visually inspect accelerator pedal connector and wiring harness for damage, corrosion, or water entry
- Wiggle test: monitor track 2 signal while moving harness and pedal connector to look for intermittent changes
- Check for other related DTCs (throttle body, reference voltage, CAN bus)
- Measure reference voltage (typically ~5V) and ground at the pedal connector with key ON, engine OFF
Signal parameters
- Typical APP potentiometer signals: 0.5–4.5 V sweep across full pedal travel (varies by model)
- Track 1 and track 2 should move together and show a consistent linear relationship; difference beyond expected tolerance (manufacturer-specific) is implausible
- Open circuit: signal near 0 V; short to battery: signal near battery voltage (≈12 V) — both are fault indications
Diagnostic algorithm
- Read and record DTC(s) and live data for both pedal tracks and throttle position with a diagnostic scan tool.
- Perform visual inspection of pedal connector and wiring for corrosion, bent pins, damage or water contamination.
- With key ON (engine OFF) measure reference voltage and ground at the pedal connector; confirm ~5V reference and good ground continuity to chassis/ECU.
- Monitor live voltages/signals for track 1 and track 2 while slowly operating the pedal; note ranges, linearity, and any dropouts or noise.
- If reference and ground are correct but track 2 is out of range or inconsistent, backprobe connector and wiggle harness to locate intermittent wiring faults.
- Check continuity between pedal connector and ECU connector for track 2, reference 5V and ground; repair any opens/shorts.
- If wiring and connectors test good, replace or bench-test the accelerator pedal assembly (compare track 1 vs track 2 behavior).
- After repair, clear codes and perform accelerator pedal calibration/relearn if required by manufacturer; re-check for return of code and verify normal throttle response.
- If faults persist after replacing pedal and repairing wiring, inspect ECU power/ground and consider ECU diagnosis or replacement as last resort.
Likely causes
- Dirty/corroded connector at pedal assembly or ECU
- Broken wire or high-resistance splice to sensor track 2
- Internal failure of pedal potentiometer (track 2)
- Loss of reference 5V or ground affecting sensor readings
Fault status
Status
Accelerator potentiometer track 2 fault — drive-by-wire potentiometer 2 signal implausible. Check pedal sensor, wiring, reference supply and grounding.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 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
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0
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