P0D13Battery Charging System Negative Contactor A Control Circuit Low
- Generic OBD-II code · Powertrain
- How the car detects it
- P0D13 means the control line of negative charging contactor A reads too low, which points to a short to ground or a driver output held down. The coil then receives no current, or too little, and the contactor stays open. No manufacturer documents P0D13 publicly; GM notes that its P0D11 test for this contactor on the Volt and ELR cannot detect a short to ground, and CARB requires plug-in vehicles to monitor charging components. Typical causes are a wire chafed against the body or battery housing and moisture inside a connector. P0D14 is the high counterpart, P0D11 the open circuit, P0D0C the same fault on the positive side. In practice the vehicle refuses to charge.
- What you may notice
- Vehicle refuses to charge
- Charging system warning
- Likely causes
- LikelyControl wire chafed through and shorted to ground
- PossibleMoisture in a connector creating a path to ground
- RareShorted contactor coil
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €100 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.