Powertrain
generic / SAE
P2122
Throttle/Pedal Position Sensor "D" Circuit Low
Sensor "D" of the redundant accelerator-pedal pair reports a voltage below the valid window. The ECU rejects the signal and falls back on the second sensor or limp-home.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number1 / 22
Possible causes
- Pedal sensor track worn high
- Signal wire shorted to ground medium
- Connector pins corroded - high contact resistance low
Symptoms
- Check engine light on
- Reduced throttle response, possible limp mode
- Hesitation or surging
- Idle too high or too low
Inspection / repair
- Difficulty: easy
- DIY: possible
- Estimated cost: 80–350 €
- Estimated time: 0.3–1.5 h
- Component: accelerator pedal sensor
- Component: accelerator pedal wiring
- MIL / check engine light
- emissions-relevant
- drive cycle required
- limp mode possible
Sources
References
sae:J2012