Hybrid/EV Battery Pack Coolant Pump A Stuck/Stalled
The HV battery pack coolant pump A is mechanically stuck or has stalled. Battery thermal management severely impaired.
Affected components
- Hv battery pack coolant pump a
- Battery pack coolant loop
Common causes
- High likelihood: Pump impeller jammed
- Medium likelihood: Motor seized
- Low likelihood: Pack cell imbalance approaching service threshold
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
Related codes
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.