Posts Tagged: ECT sensor failure

P0117 Engine Coolant Temperature Sensor Fix Guide

Common Causes of a P0118 Trouble Code Quick Summary A P0117 code means the engine coolant temperature sensor is reporting a voltage that’s too low for the conditions, which the ECM interprets as an unrealistically hot engine. In most cases, a P0117 is caused by: • a failed engine coolant temperature sensor • damaged wiring • corroded connector • low coolant • sensor that has lost ground reference. I’ll walk you through exactly what P0117 means, the most common causes, how I diagnose it professionally, and the steps I take … Read More