P0ADBHybrid/EV Battery Positive Contactor Control Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P0ADB means the drive circuit of the positive main contactor reads too low, mostly a short to ground. GM uses it widely: 2016-19 tables set it when the control voltage stays under 5.35 V with the contactor commanded on, 13 of 16 samples, Type B. The 2013 eAssist battery controller checks the low-side driver in the off state for a short to ground or an open circuit, 3 of 5 samples, two trips. Audi lists P0ADB00 in battery management 2 (J1120) of 2019-22 A6 to Q8 models with a software fix (TSB 2066205), and Dodge names it for the 2024 Charger EV (TSB 08-071-25). The battery then cannot be connected, so the vehicle will not become ready.
- What you may notice
- Vehicle does not start; multiple warnings in the cluster
- Hybrid or EV warning light
- Charging not possible
- Likely causes
- LikelyCoil control wire shorted to ground
- PossibleContactor coil internally shorted
- PossibleBattery controller software sets the code (Audi, Dodge bulletins)
- RareDriver stage in the battery controller defective
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €100 – €2,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.