P0CD1Charge Port Door A Unlock Control Circuit
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Needs a drive cycle to confirm a fix
- How the car detects it
- P0CD1 is the circuit fault of the output that releases charge flap A, normally a relay or driver that briefly powers the latch actuator. A GM patent shows such an actuator retracting a post so the spring-loaded flap can pop open. On the 2011 to 2013 Chevrolet Volt the hybrid control module 2 relies on the fault status its driver reports and covers two cases: short to ground, judged while the unlock is commanded, and a short to 12 V or an open line, judged while it is not, using sample counts such as 64 of 80 at 50 ms. It is a Type B code with the lamp after two trips, and an active P0CD1 blocks the opening check P0CD2. Split low and high codes (P0CD3, P0CD4) are not used there. Result for the driver: the flap stays shut.
- What you may notice
- Charge flap does not unlock
- Warning lamp after two trips (GM Volt)
- Emergency release needed to reach the charge socket
- Likely causes
- LikelyUnlock actuator coil open or shorted
- PossibleFaulty charge flap relay or its control wire
- PossibleChafed or corroded wiring to the actuator
- RareOutput driver in the control module damaged
- 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.