Powertrain
generic / SAE
P0A78
Drive Motor A Inverter Performance
The drive motor A inverter does not deliver commanded torque within tolerance under load, indicating thermal limit or partial IGBT failure.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / numberA / 78
Possible causes
- Thermal derating active high
- Partial IGBT failure medium
Symptoms
- EV/hybrid system warning light on
- Reduced motor power or torque
- Possible limp mode or vehicle shutdown
Inspection / repair
- Difficulty: shop only
- DIY: shop recommended
- Estimated cost: 1500–6000 €
- Estimated time: 4–16 h
- Component: inverter
- Component: drive motor a
- MIL / check engine light
- limp mode possible
Sources
References
sae:J2012