OBD-II code · Powertrain (generic, extended)
P2D66 Battery Charging System Negative Contactor C Control Circuit Range/Performance
The negative contactor C 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 P2D66?
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 in connector
- 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 C, Wiring Harness, Bms
Related codes
- P0D12Battery Charging System Negative Contactor A Control Circuit Range/Performance
- P2BCFBattery Charging System Negative Contactor B Control Circuit Range/Performance
- P2D74Battery Charging System Negative Contactor D Control Circuit Range/Performance
- P2D63Battery Charging System Negative Contactor C Stuck Closed
- P2D64Battery Charging System Negative Contactor C Stuck Open
- P2D65Battery Charging System Negative Contactor C Control Circuit/Open
- P2D67Battery Charging System Negative Contactor C Control Circuit Low
- P2D68Battery Charging System Negative Contactor C Control Circuit High
- P2D69Battery Charging System Positive Contactor D Circuit
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.