How to Test and Replace an Engine Coolant Temperature Sensor P0115 / P0125

In this video I go through the steps on determining why you may have code p0115 and/or p0125.. Ultimately, it comes down to two things, the harness connector or the coolant temperature sensor itself. A simple diagnosis that any one can perform at home. This was performed on a 1997 Nissan Maxima. Check with your vehicle's repair manual for testing parameters.

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P0115 - An excessively low or high voltage from the sensor is entered in to the ECM.
P0125 - Insufficient coolant temperature for closed loop fuel control.

Note:
This video is being performed by an experienced tech. Any attempt to repair automotive parts and/or systems carries risk of personal injury. Always adhere and follow safe practices when working on vehicles. Such as, use safety glasses, jack stands, no loose clothing, etc. No guarantee or warranty is implied. Use the information in this video at your own risk. Carsntoys is a member of the Amazon Influencer Program.

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