88 Loss of dual plug input control or electric drive fan circuit failure
How to read it
Code 88 reads as 8 flashes, pause, 8 flashes on the check-engine light. Jumper the self-test input to signal return at the test connector, then run the key on engine off self test and the running self test, counting the check-engine flashes each time.
New to flash codes? The OBD-I code reading guide walks through the paperclip method, code 12, and reading two-digit codes.
What does Ford code 88 mean?
88. Loss of dual plug input control or electric drive fan circuit failure. This code sets when your vehicle computer detects loss of dual plug input control or electric drive fan circuit failure.
Common causes of 88
- Faulty dual plug ignition input circuit
- Faulty electric cooling fan or fan relay
- Open or shorted fan circuit wiring
- Faulty shift solenoid on some models
- PCM output fault
How to fix 88
- Confirm the code and decide whether it points to ignition or the cooling fan
- Inspect the dual plug input circuit where the code applies
- Check the fan circuit and relay connectors
- Repair wiring before replacing parts
- Replace a failed part only after the circuit tests