Possible causes

– Low engine coolant level
– Faulty Engine Coolant Temperature (ECT) sensor
– Faulty engine coolant thermostat
– Engine Coolant Temperature (ECT) sensor harness is open or shorted
– Engine Coolant Temperature (ECT) sensor circuit poor electrical connection

When is the code detected?

An excessively low voltage from the sensor is sent to ECM.

Symptoms

– Engine Light ON (or Service Engine Soon Warning Light)

P0117 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.

P0117 Information for specific makes

P0117 ACURA
P0117 HONDA
P0117 BMW
P0117 CHRYSLER
P0117 DODGE
P0117 JEEP
P0117 HYUNDAI
P0117 INFINITI
P0117 NISSAN
P0117 ISUZU
P0117 KIA
P0117 LEXUS
P0117 MAZDA
P0117 TOYOTA
P0117 MITSUBISHI
P0117 SUBARU
P0117 AUDI
P0117 VOLKSWAGEN
P0117 JAGUAR
P0117 BUICK
P0117 CADILLAC
P0117 CHEVROLET
P0117 GMC
P0117 PONTIAC
P0117 SATURN