Engine Coolant Temperature Sensor P0117 / P0118 | How to Test and Replace

Engine Coolant Temperature Sensor P0117 / P0118 | How to Test and Replace

In this video, I walk you through how to test and replace the Engine Coolant Temperature (ECT) Sensor if you're facing the P0117 or P0118 error codes. I’ll show you how to use the Otofix D1 Lite Scanner to review live data and monitor your sensor readings in real time. We’ll also dive into the bridge method to test circuit integrity and ensure everything is functioning properly.

I’ll explain how to diagnose a circuit high code (P0118)—usually meaning the sensor is disconnected or unplugged, and a circuit low code (P0117)—which often indicates a short or a bad sensor. And when in doubt, remember: just take it out and unplug it for testing!

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