P0AE2
Hybrid/EV Battery Precharge Contactor Circuit Stuck Closed
The HV battery precharge contactor is stuck in the closed position. Risk of damage to precharge resistor from sustained current.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: hard
Symptoms
- EV/hybrid system warning light on
- Reduced power output or limp mode
- Charging may fail or be slowed
- Reduced electric range
Common causes
Ordered by how often each turns out to be the cause.
- Contacts welded closedCommon
- Driver stuck onPossible
- Carbon or debris buildup preventing free movementLess likely
Parts involved
- Hv Battery Precharge Contactor
- Precharge Resistor
P0AE2 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.