Posts Tagged: temperature sensor wiring issues

P0118 Engine Coolant Temperature Sensor Fix Guide

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