OBD-II code · Powertrain (generic)
P0ADF Hybrid/EV Battery Negative Contactor Control Circuit Low
The control circuit of the HV battery negative contactor reports a control circuit low condition. HV main switching cannot be commanded reliably.
Is it safe to drive with P0ADF?
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 coil
- Less likelyConnector pins corroded - high contact resistance
Symptoms
- EV/hybrid system warning light on
- Reduced power output or limp mode
- Charging may fail or be slowed
- Reduced electric range
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 2–8 h
- Emissions test
- Usually unaffected
- Parts involved
- Hv Battery Neg Contactor, Wiring Harness, Bms
Related codes
- P0ADCHybrid/EV Battery Positive Contactor Control Circuit High
- P0ADDHybrid/EV Battery Negative Contactor Control Circuit/Open
- P0ADEHybrid/EV Battery Negative Contactor Control Circuit Range/Performance
- P0AE0Hybrid/EV Battery Negative Contactor Control Circuit High
- P0AE1Hybrid/EV Battery Precharge Contactor Circuit
- P0AE2Hybrid/EV Battery Precharge Contactor Circuit Stuck Closed
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.