Hybrid/EV Battery Pack Voltage Sense Circuit Performance
BMS detects rationality fault in pack voltage sense channel, with sum of cell voltages disagreeing from total pack voltage measurement beyond tolerance.
Affected components
- Bms
- Hv battery
Common causes
- High likelihood: BMS sense channel drift
- Low likelihood: Pack cell imbalance approaching service threshold
- Low likelihood: Ground point with elevated 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.