Powertrain
generic / SAE
P0AA4
Hybrid Battery Negative Contactor Circuit
BMS detects an electrical fault in the negative HV contactor coil circuit.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / numberA / A4
Possible causes
- Contactor coil open high
Inspection / repair
- Difficulty: shop only
- DIY: shop recommended
- Estimated cost: 500–2500 €
- Estimated time: 2–8 h
- Component: hv contactor negative
- Component: bms
- MIL / check engine light
- limp mode possible
Sources
References
sae:J2012