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

Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.