Hybrid/EV Battery Pack Coolant Pump A Supply Voltage Circuit High
The HV battery pack coolant pump A reports a supply voltage circuit high condition. Battery thermal management may be impaired.
Affected components
- Hv battery pack coolant pump a
- Wiring harness
- Bms
Common causes
- High likelihood: Wire shorted to higher voltage
- Medium likelihood: Alternator overvoltage
- Low likelihood: Connector pins corroded - high contact resistance
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.