How to Test and Replace an Oil Temperature Sensor; P0196 – P0197 and P0198. This sensor detects the engine oil temperature and sends this message to the ECM. At the end of the sensor is a thermistor. Resistance decreases as temperature increases. You can quickly test the sensor via a digital multimeter and a hair dryer.

P0196 – Incorrect voltage is sent to the ECM when comparing signals from other sensors, such as the coolant temperature sensor and the intake air temperature sensor.
P0197 – Low voltage; less than 0.17 V
P0198 – High voltage; greater than 4.7 V
An average reading at idle is 1.0 to 1.4 V

This vehicle happens to be a non-turbo 2010 Subaru Impreza.

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Note:
This video is made by an experienced technician. Any attempt to repair automotive parts and/or systems carries a risk of injury. Always respect and follow safety practices when working on vehicles. For example, use safety glasses, candles, no loose clothing, etc. No warranty is implied. Use the information in this video at your own risk. If you don't think you can do the job, be smart and don't do it. Carsntoys is a member of the Amazon Influencer Program.

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