OBD-II code · Powertrain (generic)
P0A3B Generator A Over Temperature
Generator A reports temperature above the safe operating threshold.
Is it safe to drive with P0A3B?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyGenerator cooling failure
- PossibleSustained high generator load
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 2–10 h
- Emissions test
- Usually unaffected
- Parts involved
- Generator A, Generator Temp Sensor
Related codes
- P2D59Generator B Over Temperature
- P0A38Generator Temperature Sensor Circuit Low
- P0A39Generator Temperature Sensor Circuit High
- P0A3AGenerator Temperature Sensor Circuit Intermittent
- P0A3CDrive Motor A Inverter Performance
- P0A3DDrive Motor B Inverter Over Temperature
- P0A3EGenerator Inverter Over Temperature
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.