What is the solution for the P0118 trouble code?
1 Answers
Fault code: P0118, Chinese meaning: Engine Coolant Temperature (ECT) Sensor 1 Circuit High. The troubleshooting methods for this fault code are as follows: 1. Move or shake the related wiring harness or connectors while observing the sensor signal on the diagnostic tool or oscilloscope; if the fault occurs, the diagnostic tool will show corresponding changes, which can help locate the intermittent fault. If the sensor circuit is shorted to the battery positive voltage, both the ECM and the sensor may be damaged. 2. The 5V reference voltages are interconnected both inside and outside the ECM, and faults in other sensors or circuits sharing the same 5V reference voltage may also trigger this fault code. 3. During diagnosis, you can disconnect the connectors of sensors or circuits sharing the 5V voltage.