P1285high severityPowertrain
Cylinder Head Overtemperature Sensed
on 2013 Lincoln MKX 3.5L V6 · AWD
What this code means
The Cylinder Head Temperature (CHT) sensor has detected an overtemperature condition. The engine is running hotter than safe limits. This is a precursor to P1299 fail-safe activation.
Symptoms
- Check Engine Light
- Temperature gauge reading high
- Reduced engine power
- A/C may shut off automatically
Common causes
- Low engine coolant level
- Faulty thermostat stuck closed
- Failed water pump
- Clogged radiator
- Failed cooling fan
- Head gasket leak
- Faulty CHT sensor
Diagnostic steps
- Check coolant level immediately
- Verify cooling fans are operating
- Test thermostat operation
- Check for coolant leaks
- Test CHT sensor readings vs actual temperature
- Pressure test cooling system
Repair notes
Stop driving if engine is actually overheating. Check coolant level and cooling system. Replace thermostat or water pump if faulty.
Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1
P0011
Intake Camshaft Position Timing Over-Advanced Bank 1
P0012
Intake Camshaft Position Timing Over-Retarded Bank 1
P0013
Exhaust Camshaft Position Actuator Circuit/Open Bank 1
P0014
Exhaust Camshaft Position Timing Over-Advanced Bank 1
P0015
Exhaust Camshaft Position Timing Over-Retarded Bank 1