Hybrid/EV Battery Pack A Cell Thickness Sensor Circuit High
The cell thickness sensor of HV battery pack A reports voltage above 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 a
- Hybrid battery pack a thickness sensor
- Bms
Common causes
- High likelihood: Signal wire shorted to B+
- Medium likelihood: Open sensor
- 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.