OBD-II code · Powertrain (generic)
P0A3D Drive Motor B Inverter Over Temperature
The drive motor B inverter reports junction temperature above the protection threshold. Sustained high load or cooling failure.
Is it safe to drive with P0A3D?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyInverter cooling failure
- PossibleSustained high inverter load
Symptoms
- EV/hybrid system warning light on
- Reduced motor power or torque
- Possible limp mode or vehicle shutdown
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 3–14 h
- Emissions test
- Usually unaffected
- Parts involved
- Drive Motor B Inverter
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.