P0CF8: Control Pilot Charging Switch A Circuit/Open
What to do
As P0CF8 — the switch is the car's side of the handshake, so this points inside the vehicle rather than at the inlet or the charge point.
What this code means
The circuit for Control Pilot charging switch A is open or faulty.
The charging switch is the car's own voice in the pilot conversation. P0CF3 explains the handshake: the charge point asks by pulse width, and the car answers by switching resistance across the pilot line to pull its voltage down in defined steps. This switch is what does that switching — it is, quite literally, how the car says I am ready.
So a fault here is not a fault in hearing the charge point. The car may be receiving the offer perfectly and simply be unable to reply, which produces a vehicle that recognises a cable has been plugged in and then does nothing.
That distinction is worth stating because it points somewhere different: the pilot circuit codes point at the inlet and its wiring; the switch codes point inside the vehicle, at the charging control electronics.
Likely causes
Start here
- Faulty on-board charger · specialist
- Corroded or loose connector · easy
Less common
- Damaged charging inlet or pins · moderate
- Water ingress into connector · easy
Symptoms
Components involved
Information, not instruction
CarGeek is a reference, not a service manual. Its pages are written from public sources and from what other people have found, never from a manufacturer's own service information, so they can be wrong or incomplete for your particular vehicle. Some of what they describe carries real risk: high voltage, fuel under pressure, stored energy, hot and moving parts.
Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
Community experience
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