OBD-II code · Powertrain (generic, extended)
P2BC4 Battery Charging System Positive Contactor B Circuit
The positive contactor B of the battery charging system reports a circuit condition. HV charging path cannot be commanded reliably.
Is it safe to drive with P2BC4?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyContactor failed
- PossibleWiring or connector fault
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
- P0D07Battery Charging System Positive Contactor A Circuit
- P2D5BBattery Charging System Positive Contactor C Circuit
- P2D69Battery Charging System Positive Contactor D Circuit
- P2BC1Charge Air Cooler Coolant Pump A Stuck/Stalled
- P2BC2Charge Air Cooler Coolant Pump A Supply Voltage Circuit
- P2BC3Charge Air Cooler Coolant Pump A Control Module Overtemperature
- P2BC5Battery Charging System Positive Contactor B Stuck Closed
- P2BC6Battery Charging System Positive Contactor B Stuck Open
- P2BC7Battery Charging System Positive Contactor B Control Circuit/Open
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.