P2E6C
Hybrid/EV Battery Pack A Cell Thickness
The BMS detects abnormal cell thickness in HV battery pack A. Cell swelling indicates aging, thermal stress, or imminent failure.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: hard
Symptoms
- EV/hybrid system warning light on
- Reduced power output or limp mode
- Charging may fail or be slowed
- Reduced electric range
Common causes
Ordered by how often each turns out to be the cause.
- Cells aged - swellingCommon
- Thermal stress damaged cellsPossible
- Pack cell imbalance approaching service thresholdLess likely
Parts involved
- Hybrid Battery Pack A
- Hybrid Battery Pack A Thickness Sensor
- Bms
P2E6C is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.