Possible causes

– Faulty Engine Oil Temperature sensor
– Engine Oil Temperature sensor harness is open or shorted
– Engine Oil Temperature sensor circuit poor electrical connection

When is the code detected?

The P0197 indicates the Engine Oil Temperature Sensor signal voltage is low (high temperature).

Symptoms

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

P0197 Description

The engine oil temperature sensor is used to detect the engine oil temperature. The sensor modifies a voltage signal from the Engine Control Module (ECM). The modified signal returns to the ECM as the engine oil 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.

P0197 Information for specific makes

P0197 INFINITI
P0197 HYUNDAI
P0197 NISSAN
P0197 SUBARU
P0197 KIA
P0197 CHRYSLER
P0197 FORD
P0197 VOLKSWAGEN