|P0118 – Engine Coolant Temperature (ECT) Sensor 1 Circuit High|
|Description: Indicates the sensor signal is greater than the self-test maximum. The ECT sensor maximum is 4.6 volts or -50°C (-58°F).
Possible Causes: • Open circuit in the harness
• Sensor signal short to voltage
• Incorrect harness connection
• Damaged sensor
Diagnostic Aids: An ECT PID reading greater than 4.6 volts with the ignition ON engine OFF or during any engine operating mode indicates a concern is present.