P2620
Throttle Position Output Circuit
A general electrical fault on the ECU output that broadcasts the throttle position signal to other modules — for example to the transmission control or hybrid drive controller.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: medium
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.
- Output wire open or shortedCommon
- ECU output stage failedPossible
Parts involved
- ECM
- Vehicle Data Bus
P2620 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.