What are the common causes of P0CF4?

Control pilot voltage outside its expected range. High resistance in the control pilot wiring. Corroded or bent pins in the charge port connector. A chafed control pilot wire. Water in the charge port connector.

Read control pilot voltage on a scan tool. Compare the control pilot reading against spec. Inspect the charge port connector for corrosion. Measure resistance in the control pilot circuit. Repair the fault once located. Clear the code and retest.

P0CF4

Control Pilot Circuit Range/Performance

System: Powertrain control (P code)
Lamp: Check Engine Light
Category: Powertrain - Hybrid Propulsion

What it means

P0CF4 means Control Pilot Circuit Range/Performance.

Check these first

Control pilot voltage outside its expected range
High resistance in the control pilot wiring
Corroded or bent pins in the charge port connector
A chafed control pilot wire
Water in the charge port connector

What to do next

Read control pilot voltage on a scan tool
Compare the control pilot reading against spec
Inspect the charge port connector for corrosion
Measure resistance in the control pilot circuit
Repair the fault once located
Clear the code and retest

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Updated

Generic SAE J2012 definition. Last updated 2026-10-10.