P0A3B
Generator A Over Temperature
Generator A reports temperature above the safe operating threshold.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: hard
Common causes
Ordered by how often each turns out to be the cause.
- Generator cooling failureCommon
- Sustained high generator loadPossible
Parts involved
- Generator A
- Generator Temp Sensor
P0A3B 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.