Damaged, corroded or contaminated pins or terminals in the charge inlet, affecting the control pilot contact; Wiring fault between the charge inlet and the charging control module, such as a short to voltage or chafed insulation; Poor connection or water ingress in the charging control module connector; Fault with the charging cable or charge point control pilot signal, such as an out-of-range signal level; Faulty control pilot switch or detection circuit inside the on-board charger or charging control module; Outdated or faulty control module software, where the manufacturer lists it as a known cause for the model.

P0CFB

Control Pilot Charging Switch A Circuit High.

Generic
Powertrain
Generic code
Medium severity

How this code is built

P: SystemPowertrain
0: Defined bySAE, the same on every car
C: AreaHybrid propulsion
FB: FaultThe specific fault in that area

What it means

P0CFB is the generic code for a high-voltage reading on the control pilot charging switch 'A' circuit. The control pilot is the signal line between the charging cable or charge point and the vehicle's charging control module. The module saw a voltage on that circuit above the expected range, so it can't reliably detect or manage a charging session. The exact switch and signal arrangement depends on the model.

Symptoms

Vehicle will not start charging, or charging stops soon after it begins
Charge port light or dashboard shows a charging fault or 'check charging system' message
Charge cable appears to lock, or fails to lock or release, at the port
Charging works on one charge point or cable but not another
Malfunction or hybrid/EV system warning lamp on, with reduced electric range on plug-in hybrids

Possible causes

Damaged, corroded or contaminated pins or terminals in the charge inlet, affecting the control pilot contactlikely
Wiring fault between the charge inlet and the charging control module, such as a short to voltage or chafed insulationlikely
Poor connection or water ingress in the charging control module connectorpossible
Fault with the charging cable or charge point control pilot signal, such as an out-of-range signal levelpossible
Faulty control pilot switch or detection circuit inside the on-board charger or charging control modulepossible
Outdated or faulty control module software, where the manufacturer lists it as a known cause for the modelrare

How to diagnose

Read all stored and pending codes and the freeze frame data, noting whether other charging, high-voltage or communication codes are present.
Try a different charging cable and charge point to find out whether the fault follows the equipment or the vehicle.
Inspect the charge inlet for debris, moisture, bent, burnt or corroded pins and check the cable plug for similar damage.
With the vehicle safely powered down and following the manufacturer's high-voltage safety procedure, inspect the wiring and connectors between the inlet and the charging control module for chafing, water, corrosion and pin tension.
Check the manufacturer's data for the model to find the control pilot circuit layout and the expected voltage levels.
With the correct procedure, measure the control pilot circuit for short to voltage, open circuit or high resistance, and check the related supply and earth connections.
Check for technical service bulletins and available software updates for the charging control module on this model.
Clear the codes after repair and test charge, then confirm the code does not return.

How to fix

Clean or replace the damaged charge inlet or its terminals
Repair or replace the faulty wiring and connector terminals in the control pilot circuit
Dry out, clean or replace the connector at the charging control module if there is water or corrosion
Replace a faulty charging cable, or report a faulty charge point to its operator
Replace the charging control module or on-board charger if testing confirms an internal fault
Update the control module software if the manufacturer identifies it as a fix for this fault

Can I keep driving?

Medium severity

A plug-in hybrid can usually still be driven on the engine, and an electric car can be driven while there is enough charge, but you may not be able to recharge. Have it checked soon, and stop and seek help if high-voltage system warnings appear or the car loses power.

Guide written by AI from the code's definition. Confirm with a diagnosis before replacing parts.