P2BEA
Hybrid/EV Battery Precharge Contactor Control Circuit B Low
The control circuit B for the hybrid battery precharge contactor reports a low condition. Pre-charging the DC link before main contactor closure cannot be commanded reliably.
- 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.
- Control wire shorted to groundCommon
- Internal short in contactor coilPossible
- Pack cell imbalance approaching service thresholdLess likely
Parts involved
- Hybrid Precharge Contactor B
- Wiring Harness
- Bms
P2BEA 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.