P0118 for Volkswagen - (ECT) Engine Colant Temperature Circuit HighSymptoms:- Engine Light ON (or Service Engine Soon Warning Light)
Possible causes:
(Inspect the following... Repair/Replace if necessary)
- Low engine coolant level
- Engine Coolant Temperature (ECT) sensor harness is open or shorted
- Engine Coolant Temperature (ECT) sensor electrical circuit poor connection
- Faulty Engine Coolant Temperature (ECT) sensor
- Faulty engine coolant thermostat
P0118 VOLKSWAGEN Description:
The Engine Coolant Temperature (ECT) sensor is used to detect the
engine coolant temperature. The sensor modifies a voltage signal from
the
Engine Control Module (ECM). The modified signal returns to the (ECM)
as the engine coolant temperature input. The sensor uses a thermistor
which is sensitive to the change in temperature. The electrical
resistance of the thermistor decreases as temperature increases.
When is the code detected?:When an excessively high voltage from the sensor is sent to ECM.
I hope this helps! Let me know if you need further assistance.
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