Engine Coolant Over Temperature Condition
Coolant temperature exceeded the safe maximum. Engine overheating event detected — risk of head gasket damage or seizure.
Affected components
- Cooling system
- Thermostat
- Water pump
- Radiator
Common causes
- High likelihood: Thermostat stuck closed
- High likelihood: Low coolant level (leak)
- Medium likelihood: Water pump failed
Possible symptoms
- Check engine light on
- Cooling fan runs constantly or not at all
- Cabin heater weak or excessively hot
- Possible long warm-up time or hard cold start
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
- Reduced-power or limp mode may occur
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.