P0CF3: Control Pilot Circuit /Open

What it means

The control pilot signal (SAE J1772 / IEC 61851 charging) reports a circuit /open condition. EV charging handshake compromised.

At a glance

• Usually lights the check-engine light

How it works

The control pilot is the signaling path used between an EV and compatible charging equipment to establish and manage a charging session. This code sets when the vehicle detects an open pilot circuit, so the charging handshake may not complete or may be interrupted.

Common causes

Most likely first.

1. Open in pilot wire
2. EVSE charging cable disconnected

Symptoms

• Charge status indicator shows fault
• Charging may not start or interrupts
• Slower-than-expected charge rate

How to diagnose it

1. Check the charge-status display and scan-tool data for the pilot fault, and note whether it occurs with one charging unit or several.
2. Confirm the charging connector is fully inserted and the EVSE cable is connected and latched at both ends.
3. Inspect the charge inlet and cable plug for debris, moisture, damaged terminals, or signs of wear.
4. With charging equipment disconnected and the vehicle made safe according to service information, inspect accessible pilot wiring and connectors for a break or disconnected terminal.
5. Have the pilot circuit continuity and related components tested against the manufacturer's specification if the external connections are intact.

Common fixes

• Reconnect and fully seat the EVSE cable and vehicle connector.
• Remove loose debris from the inlet and plug using the vehicle and EVSE instructions.
• Repair an open or damaged pilot wire or terminal.
• Replace a failed pilot-circuit component if testing confirms the fault.

Can I keep driving?

Driving is generally unaffected by this charging-circuit fault, but charging may fail or stop, so make sure the vehicle has enough range for the trip. Do not handle exposed or damaged charging connectors; stop using that cable or inlet until it is repaired.