P0CFD code meaning
Control Pilot Charging Switch A Stuck Off
What P0CFD means
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.
P0CFD at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyWorkshop only
- Typical labor0.5 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P0CFD
- Vehicle shows plugged in, but charging never begins
- Charging station remains in standby or connected state
Common causes of P0CFD
- Most likelyCharging switch or relay in the module no longer closing
- PossibleOpen resistor or solder joint in the 1.3 kΩ branch
- Less likelyCharging module software not issuing the close command correctly
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Control pilot switch aWiring harnessOn board charger
What each part of P0CFD means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| C | Area: hybrid propulsion. |
| FD | The exact fault in that area. |
What to do next
- Note P0CFD and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P0CFD
What does P0CFD mean?
P0CFD means "Control Pilot Charging Switch A Stuck Off". 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. It is a generic code, so it means the same on every make.
Is it safe to drive with P0CFD?
P0CFD does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will P0CFD fail an emissions test?
P0CFD is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is P0CFD to fix?
Difficulty: workshop only. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will P0CFD clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.