DTC P0118: Engine Coolant Temperature (ECT) Sensor 1 Circuit High Input
WARNING: This page does not describe the selected car, but rather 32 other vehicles, including the 2005 Mercury Sable, 2005 Mercury Mountaineer, 2005 Mercury Monterey, 2005 Mercury Montego, and 2005 Mercury Mariner. However, it is still accessible from the selected car via links, so may be relevant.
P0118 - ENGINE COOLANT TEMPERATURE (ECT) SENSOR 1 CIRCUIT HIGH INPUT
| 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). Note: On some vehicles that are not equipped with an ECT sensor, a cylinder head temperature (CHT) sensor can be used and can set this DTC. | ||
| Possible Causes: |
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| Diagnostic Aids: | An ECT V PID reading greater than 4.6 volts with the key on engine off (KOEO) or during any engine operating mode indicates a hard fault. | ||
| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| Vehicles with only a cylinder head temperature (CHT) sensor | GO to DL: Cylinder Head Temperature (CHT) Sensor STEP DL7. | GO to DL: Cylinder Head Temperature (CHT) Sensor STEP DL7. | GO to DL: Cylinder Head Temperature (CHT) Sensor STEP DL14. |
| Vehicles with only an engine coolant temperature (ECT) sensor | GO to DX: Engine Coolant Temperature (ECT) Sensor STEP DX7. | GO to DX: Engine Coolant Temperature (ECT) Sensor STEP DX7. | GO to DX: Engine Coolant Temperature (ECT) Sensor STEP DX15. |
| Vehicles with both a CHT and an ECT sensor | GO to DX: Engine Coolant Temperature (ECT) Sensor STEP DX7. | GO to DX: Engine Coolant Temperature (ECT) Sensor STEP DX7. | GO to DX: Engine Coolant Temperature (ECT) Sensor STEP DX15. |