P2107
Throttle Actuator Control Module Internal Processor
The internal processor or watchdog of the throttle actuator control module reports an internal fault. Communication between the TAC monitor core and the main ECU core has failed plausibility — typical for a defective ECU.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: hard
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.
- ECU internal processor faultCommon
- ECU software flash corruptedLess likely
- Module software outdated, reflash may resolveLess likely
Parts involved
- ECM
P2107 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.