P0CFDControl Pilot Charging Switch A Stuck Off
- Generic OBD-II code · Powertrain
- How the car detects it
- Stuck Off means the module commands charging switch A closed, but the pilot does not show the expected effect: the level stays at the connected value of about 9 V instead of dropping to around 6 V, so the station never receives a charge request. Possible are a switch or relay that no longer closes, an open resistor in the 1.3 kΩ branch, or a fault in the pilot measuring path. No manufacturer documents this code publicly; GM's plausibility test P0CF9 on the Chevrolet Volt evaluates the same switch from the pilot voltage during a self-test, and CARB requires the charging system to be monitored on plug-in vehicles. Its opposite is P0CFE, a switch that will not open; circuit faults are P0CF8 to P0CFB. The car is detected at the station and may report that it is plugged in, but charging never starts.
- What you may notice
- Vehicle shows plugged in, but charging never begins
- Charging station remains in standby or connected state
- Likely causes
- LikelyCharging switch or relay in the module no longer closing
- PossibleOpen resistor or solder joint in the 1.3 kΩ branch
- RareCharging module software not issuing the close command correctly
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €100 – €1,200
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.