Hybrid/EV Battery Pack B Cell Thickness Sensor Circuit Low
The cell thickness sensor of HV battery pack B reports voltage below the expected window. 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
- Hybrid battery pack b
- Hybrid battery pack b thickness sensor
- Bms
Common causes
- High likelihood: Signal wire shorted to ground
- Medium likelihood: Internal sensor short
- 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
- A drive cycle may be required after repair
- 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.