P1285 Cylinder Head Over-Temperature Condition
What does P1285 mean on a Ford?
P1285 — Cylinder Head Over-Temperature Condition. This Ford-enhanced code applies to F-150, Super Duty, Mustang, Explorer with CHT sensors.
Common causes of P1285
- Coolant loss from a hose, radiator or water pump leak
- Failed thermostat
- Inoperative cooling fan
- Failed water pump
- Faulty CHT sensor reporting a false over-temperature
How to fix P1285
- Stop driving and allow a full cool-down before opening anything
- Pressure test the cooling system and repair leaks
- Verify thermostat and fan operation
- Inspect the water pump and belt
- Test the CHT sensor only after the cooling system checks out