P2136
Throttle/Pedal Position Sensor A/C Voltage Correlation
The "A" and "C" channels of the throttle or pedal sensor disagree by more than the allowed tolerance. The ECU cannot trust either reading and forces limp-home with reduced torque.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: easy
Symptoms
- Check engine light on
- Reduced throttle response, possible limp mode
- Hesitation or surging
- Idle too high or too low
Common causes
Ordered by how often each turns out to be the cause.
- One sensor track wornCommon
- Connector corroded with leakagePossible
Parts involved
- Accelerator Pedal Sensor
- Pedal Sensor Wiring
P2136 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.