586 A/C clutch circuit open
How to read it
Code 586 reads as 5 flashes, pause, 8 flashes, pause, 6 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 586 mean?
586. A/C clutch circuit open. This code sets when your vehicle computer detects a/c clutch circuit open.
Common causes of 586
- Wiring open circuit/short circuit to positive
- A/C compressor clutch
- Variable control relay module
- ECM
How to fix 586
- Check the circuit wiring for a short to power
- Check for A/C compressor clutch
- Test the variable control relay module and replace it only if it fails its own test
- Test the ECM last, only after every circuit test has passed
- Clear the code, then retest to confirm the fix holds