P2C97
Hybrid/EV Battery Disable Circuit Low
The hybrid battery disable circuit reports a circuit low condition. Service disconnect signal cannot be read reliably.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: medium
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.
- Signal wire shorted to groundCommon
- Service disconnect switch shortedPossible
- Connector pins corroded - high contact resistanceLess likely
Parts involved
- Hybrid Battery Disable Switch
- Wiring Harness
- Bms
P2C97 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.