Engine Coolant Temperature Sensor 3 Circuit
Generic electrical fault on engine coolant temperature sensor 3 (third measurement location, e.g. radiator outlet or heater core).
Affected components
- Ect sensor 3
- Sensor wiring
Common causes
- High likelihood: Sensor 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
- A drive cycle may be required after repair
Related codes
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.