P1290Cylinder head temperature sensor circuit low
- Ford code · Engine
- Turns on the check-engine light
- How the car detects it
- The cylinder head temperature (CHT) sensor signal is stuck low, which normally means the circuit is shorted to ground. P0117 may be stored with it. Many Ford engines use this sensor as their only engine temperature reading, so the cooling fan and the temperature gauge may not work normally.
- What you may notice
- Check-engine light
- Temperature gauge or cooling fan behaving oddly
- Likely causes
- PossibleSensor wiring shorted to ground
- RareFailed sensor
- RareWrong harness connection
- Sources
Backed by at least two independent sources.
From Obdaryn's Ford pack, exactly as the app shows it, with the public sources above. Guidance only; confirm with a workshop.