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.
Affected components
- Hv battery precharge contactor
- Precharge resistor
Common causes
- High likelihood: Contacts welded closed
- Medium likelihood: Driver stuck on
- Low likelihood: Carbon or debris buildup preventing free movement
Possible symptoms
- EV/hybrid system warning light on
- Reduced power output or limp mode
- Charging may fail or be slowed
- Reduced electric range
Diagnostic notes
- The malfunction indicator lamp may illuminate
- Reduced-power or limp mode may occur
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.