Damaged or corroded terminals at the charge port or on the control pilot circuit.; Broken, chafed, or open wiring in the control pilot circuit between the charge port and the control module.; Faulty charge port assembly with internal open circuit.; Failed or malfunctioning control module that monitors the pilot signal.; Water intrusion or contamination in the charge port connector causing an open circuit.; Loose or disconnected electrical connector on the control pilot path.; Aftermarket charging equipment or improper charging cable causing a signal interruption.

DTC codes / P0Cxx · Hybrid propulsion / P0CF3

P0CF3Control Pilot Circuit /Open

Q: What does code P0CF3 mean?

Control Pilot Circuit /Open. P0CF3 indicates that the powertrain control module has detected an open circuit in the control pilot line, which is the communication path used to manage charging between an electric or plug-in hybrid vehicle and the charging equipment. The computer monitors the expected voltage or signal on this circuit and sets the code when the circuit remains open or outside the expected range for a calibrated period.

P0CF3 indicates that the powertrain control module has detected an open circuit in the control pilot line, which is the communication path used to manage charging between an electric or plug-in hybrid vehicle and the charging equipment. The computer monitors the expected voltage or signal on this circuit and sets the code when the circuit remains open or outside the expected range for a calibrated period.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaHybrid propulsion

Symptoms you may notice

The charging system may fail to initiate or may stop charging unexpectedly.
A warning light or message on the instrument cluster indicating a charging system fault.
The vehicle may refuse to enter or complete a charge session.
In some cases, no symptoms besides the warning light, especially if the fault is intermittent.
The charging port may show signs of damage, corrosion, or loose connection.
The vehicle may default to a reduced charging rate or disable charging entirely.

Common causes, most likely first

Damaged or corroded terminals at the charge port or on the control pilot circuit.
Broken, chafed, or open wiring in the control pilot circuit between the charge port and the control module.
Faulty charge port assembly with internal open circuit.
Failed or malfunctioning control module that monitors the pilot signal.
Water intrusion or contamination in the charge port connector causing an open circuit.
Loose or disconnected electrical connector on the control pilot path.
Aftermarket charging equipment or improper charging cable causing a signal interruption.

How to diagnose and fix it

Inspect the charge port and charging cable connector for corrosion, debris, or damage; clean or replace as needed.
Check the control pilot circuit wiring for continuity and signs of damage; repair any open or shorted wires.
Verify the charging equipment is functioning correctly by testing with a known-good charging station or cable.
Perform a voltage drop or signal test on the control pilot circuit at the charge port and at the control module to locate the open.
Inspect and reseat all connectors related to the control pilot circuit, looking for loose pins or pushed-out terminals.
If the circuit tests good, follow the manufacturer's diagnostic flow to test the control module and replace if faulty.
Clear the code and perform a charging test to confirm the repair.

Control Pilot Circuit Open: Common Oversights

Many technicians replace the charge port assembly without first checking the control pilot wiring for continuity, which is often the actual open circuit.
Intermittent open circuits can be caused by a broken wire inside the insulation that only opens when the cable is flexed or at certain temperatures.
The control pilot circuit is part of the charging communication protocol, so a fault can prevent charging even if the high-voltage battery and charging hardware are otherwise healthy.
Aftermarket charging cables or adapters that do not meet specifications can cause a control pilot open circuit code without any vehicle fault.
Some vehicles set P0CF3 if the control pilot signal is lost during a charging session due to a poor connection at the charge port, which may not be present during a static inspection.

Can I keep driving with P0CF3?

The vehicle may be safe to drive because the fault primarily affects charging, but avoid relying on charging until the issue is resolved. Do not attempt to charge if you see damaged connectors or signs of overheating, and have the circuit inspected promptly to prevent further damage.

Tools that help

Tools we recommend are in the Auto Veteran shop on Amazon. As an Amazon Associate we earn from qualifying purchases.

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.