P0BBE
Hybrid/EV Battery Pack Voltage Variation
The BMS detects excessive variation between cell-group voltages within the HV battery pack. Cell imbalance beyond compensation.
- 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.
- Cell capacity imbalanceCommon
- Cell balancing function failedPossible
- Ground point with elevated resistanceLess likely
Parts involved
- Hv Battery Pack
- Bms
P0BBE 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.