OBD-II code · Powertrain (generic, extended)
P2BC9 Battery Charging System Positive Contactor B Control Circuit Low
The positive contactor B of the battery charging system reports a control circuit low condition. HV charging path cannot be commanded reliably.
Is it safe to drive with P2BC9?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyControl wire shorted to ground
- PossibleInternal short in contactor coil
- Less likelyConnector pins corroded - high contact resistance
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 2–8 h
- Emissions test
- Usually unaffected
- Parts involved
- Bcs Pos Contactor B, Wiring Harness, Bms
Related codes
- P0D0CBattery Charging System Positive Contactor A Control Circuit Low
- P2D60Battery Charging System Positive Contactor C Control Circuit Low
- P2D6EBattery Charging System Positive Contactor D Control Circuit Low
- P2BC6Battery Charging System Positive Contactor B Stuck Open
- P2BC7Battery Charging System Positive Contactor B Control Circuit/Open
- P2BC8Battery Charging System Positive Contactor B Control Circuit Range/Performance
- P2BCABattery Charging System Positive Contactor B Control Circuit High
- P2BCBBattery Charging System Negative Contactor B Circuit
- P2BCCBattery Charging System Negative Contactor B Stuck Closed
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.