OBD-II code · Powertrain (generic)
P0A79 Drive Motor B Inverter Performance
The drive motor B inverter does not deliver the expected power conversion. Switching loss elevated, gate driver fault, or capacitor degraded.
Is it safe to drive with P0A79?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyIGBT switching characteristic degraded
- PossibleDC-link capacitor aged
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, Hybrid Control Module
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.