P0DAB
Hybrid/EV Battery Cell Balancing Performance
The BMS detects that overall cell balancing performance is below expectation. Multi-cell imbalance increases despite balancing efforts.
- 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.
- Multiple balancing circuits agedCommon
- Cells severely aged - capacity spreadPossible
- Pack cell imbalance approaching service thresholdLess likely
Parts involved
- Hv Battery Pack
- Bms
- Cell Balancing Circuits
P0DAB 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.