P0CF9: Control Pilot Charging Switch A Range/Performance
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
Control Pilot charging switch A is operating, but not producing the pilot levels it should. The resistances involved are defined precisely by the standard, so a switch that has drifted — or a resistor that has changed value with age or heat — puts the car's answer between two recognised states. The charge point then sees a message it cannot interpret and declines to proceed. What the switch does is at P0CF8.
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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What makes one worth reading:
- The car — make, model, year and engine. The same fault behaves differently on each.
- What you measured, not only what you replaced.
- What actually fixed it — or that nothing did, which is worth knowing too.
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