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 P0198 indicates the Engine Oil Temperature Sensor signal voltage is hign (low temperature).

Symptoms

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

P0198 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.

P0198 Information for specific makes

P0198 CHRYSLER
P0198 HYUNDAI
P0198 FORD
P0198 INFINITI
P0198 KIA
P0198 NISSAN
P0198 SUBARU
P0198 VOLKSWAGEN