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P0117 - Engine Coolant Temperature Circuit Low Input

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
What does this mean? What does this mean?
When is the code detected?
An excessively low voltage from the sensor is sent to ECM.
Possible 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 Engine Coolant Temperature Sensor 1 Circuit Low Voltage
P0117 AUDI Engine Coolant Temperature Circuit Low
P0117 BMW Engine Coolant Temperature Sensor 1 Circuit Low
P0117 BUICK Engine Coolant Temperature Circuit Low Input
P0117 CADILLAC Engine Coolant Temperature Circuit Low Input
P0117 CHEVROLET Engine Coolant Temperature Circuit Low Input
P0117 CHRYSLER Engine Coolant Temperature Sensor Circuit Low
P0117 DODGE Engine Coolant Temperature Sensor Circuit Low
P0117 FORD Engine Coolant Temperature Circuit Low Input
P0117 GMC Engine Coolant Temperature Circuit Low Input
P0117 HONDA Engine Coolant Temperature Sensor 1 Circuit Low Voltage
P0117 HYUNDAI Engine Coolant Temperature Circuit Low Input
P0117 INFINITI Engine Coolant Temperature Circuit Low
P0117 ISUZU Engine Coolant Temperature Sensor Circuit Low Voltage
P0117 JAGUAR Engine Coolant Temperature Circuit Low Input
P0117 JEEP Engine Coolant Temperature Sensor Circuit Low
P0117 KIA Engine Coolant Temperature Sensor 1 Circuit Low Input
P0117 LEXUS Engine Coolant Temperature Circuit Low Input
P0117 MAZDA Engine Coolant Temperature Circuit Low Input
P0117 MERCEDES-BENZ Engine Coolant Temperature Circuit Low Input
P0117 MINI Engine Coolant Temperature Sensor 1 Circuit Low
P0117 MITSUBISHI Engine Coolant Temperature Sensor Low Input
P0117 NISSAN Engine Coolant Temperature Circuit Low
P0117 PONTIAC Engine Coolant Temperature Circuit Low Input
P0117 SATURN Engine Coolant Temperature Circuit Low Input
P0117 SCION Engine Coolant Temperature Circuit Low Input
P0117 SUBARU Engine Coolant Temperature Circuit Low Input
P0117 TOYOTA Engine Coolant Temperature Circuit Low Input
P0117 VOLKSWAGEN Engine Coolant Temperature Circuit Low Input
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