Hybrid/EV Battery A Voltage High
The voltage of HV battery A exceeds the expected window. Charging overvoltage or sense fault. Cell-group voltage monitoring is the foundation of HV battery safety — drift here triggers contactor opening, charge inhibit, and reduced power to protect the pack.
Affected components
- Hv battery a
- Bms
Common causes
- High likelihood: Charging system overvoltage
- Medium likelihood: Sense circuit drifted high
- 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.