Powertrain
generic / SAE
P0AA3
Hybrid/EV Battery Negative Contactor Circuit
The HV battery negative contactor circuit reports a generic fault. HV system grounding cannot be commanded reliably.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / numberA / A3
Possible causes
- Contactor failed high
- Wiring fault medium
- Pack cell imbalance approaching service threshold low
Symptoms
- EV/hybrid system warning light on
- Reduced power output or limp mode
- Charging may fail or be slowed
- Reduced electric range
Inspection / repair
- Difficulty: hard
- DIY: shop recommended
- Estimated cost: 400–2500 €
- Estimated time: 2–8 h
- Component: hv battery negative contactor
- Component: bms
- MIL / check engine light
- limp mode possible
Sources
References
sae:J2012