OBD-II code · Powertrain (generic)
P0AA2 Hybrid/EV Battery Positive Contactor Circuit Stuck Open
The HV battery positive contactor is stuck in the open position. Charging or discharging the HV bus is not possible.
Is it safe to drive with P0AA2?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyContactor mechanically failed
- PossibleContactor coil burnt out
- Less likelyCarbon or debris buildup preventing free movement
Symptoms
- EV/hybrid system warning light on
- Reduced power output or limp mode
- Charging may fail or be slowed
- Reduced electric range
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 2–8 h
- Emissions test
- Usually unaffected
- Parts involved
- Hv Battery Positive Contactor, Bms
Related codes
- P0A9FHybrid/EV Battery Temperature Sensor A Circuit Intermittent/Erratic
- P0AA0Hybrid/EV Battery Positive Contactor Circuit
- P0AA1Hybrid Battery Positive Contactor Circuit
- P0AA3Hybrid/EV Battery Negative Contactor Circuit
- P0AA4Hybrid Battery Negative Contactor Circuit
- P0AA5Hybrid/EV Battery Negative Contactor Circuit Stuck Open
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.