P2D63
Battery Charging System Negative Contactor C Stuck Closed
The negative contactor C of the battery charging system reports a stuck closed condition. HV charging path cannot be commanded reliably.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: hard
Common causes
Ordered by how often each turns out to be the cause.
- Contactor contacts welded closedCommon
- Output driver stuck onPossible
- Carbon or debris buildup preventing free movementLess likely
Parts involved
- Bcs Neg Contactor C
- Wiring Harness
- Bms
P2D63 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.