P0118 – Engine Coolant Temperature Sensor Circuit High Input
- System
- Engine
- Dashboard light
- Check engine light (MIL)
- Check-engine blink code
- —
- Applies to
- Generic OBD-II meaning. Not every code is used by this car.
- Description
- Engine Coolant Temperature Sensor Circuit High Input
- Detection / symptoms
- 1.Check engine light on
- Possible causes
- 1.A bad connection at the sensor 2.An open in the ground circuit between the 3.ECT sensor 4.And the PCM 5.A short in the voltage feed between the sensor and the PCM 6.A bad PCM (less likely) 7.A bad temperature sensor (shorted internally)
- What to check
- 1.Read the code and freeze-frame data with an OBD-II scanner 2.Check the connector and wiring of the part named in the code 3.Test the part with scanner live data or a multimeter, using the values in the repair manual 4.Fix the cause, clear the code and test-drive
- Confidence
- medium (generic OBD-II definition, not checked against the factory manual for this car)
Generic OBD-II meaning (obd-codes.com), not checked against this car's factory manual. Clear the code and test-drive to confirm it returns. Search all fault codes · Common problems · Warning lights