P0CD3Charge Port Door A Unlock Control Circuit Low
- Generic OBD-II code · Powertrain
- How the car detects it
- P0CD3 narrows the unlock output fault of charge flap A down to a low level: the monitored voltage on the actuator or relay control line stays near ground when it should be higher, which typically means a short to ground on the control wire or a failed actuator coil pulling the line down. No manufacturer documents this code publicly. GM's Volt tables of 2011 and 2012 fold the short to ground into the combined circuit code P0CD1 instead of using P0CD3. CARB 13 CCR 1968.2 (e)(15) asks for circuit checks on outputs only where emissions or other diagnostics depend on them. The GM charge port patent illustrates the actuator that this output powers. The high-side case is P0CD4, the functional test P0CD2. A driver usually finds that the flap no longer releases, and a blown fuse is possible.
- What you may notice
- Charge flap does not unlock
- Possibly blown fuse in the actuator supply
- Likely causes
- LikelyActuator control wire shorted to ground
- PossibleShorted winding in the unlock actuator
- RareWater in the actuator connector
- Repair
- Medium · Often possible to do yourself.Typical cost: €80 – €500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.