OBD-II code · Powertrain (generic)
P0D12 Battery Charging System Negative Contactor A Control Circuit Range/Performance
The negative contactor A of the battery charging system reports a control circuit range/performance condition. HV charging path cannot be commanded reliably.
Is it safe to drive with P0D12?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyCoil resistance drifted
- PossibleHigh-resistance contact
- Less likelySensor element aged beyond calibration window
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 Neg Contactor A, Wiring Harness, Bms
Related codes
- P2BCFBattery Charging System Negative Contactor B Control Circuit Range/Performance
- P2D66Battery Charging System Negative Contactor C Control Circuit Range/Performance
- P2D74Battery Charging System Negative Contactor D Control Circuit Range/Performance
- P0D0FBattery Charging System Negative Contactor A Stuck Closed
- P0D10Battery Charging System Negative Contactor A Stuck Open
- P0D11Battery Charging System Negative Contactor A Control Circuit/Open
- P0D13Battery Charging System Negative Contactor A Control Circuit Low
- P0D14Battery Charging System Negative Contactor A Control Circuit High
- P0D15Battery Charging System A High Voltage Interlock CircuitCircuit/Open
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.