P0CF4
Control Pilot Circuit Range/Performance
Generic OBD-II
Common symptoms
What you'll notice
- Check the wiring and connections of the control pilot circuit for any loose or damaged components.
- Replace any faulty control pilot circuit components, such as relays or switches.
- Inspect the control pilot circuit fuse for any signs of damage or wear, and replace if necessary.
- Consult the vehicle or motorcycle's manual for specific troubleshooting steps or further guidance on the control pilot circuit issue.
Common causes
Most likely first
- Loose or corroded electrical connections in the control pilot circuit
- Faulty control pilot valve or switch
- Damaged control pilot circuit wiring
- Defective control pilot relay
- Malfunctioning control pilot sensor
How to diagnose & fix
Work through it in order
- Warning light illuminates
Read & clear P0CF4 yourself
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