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The ECT Sensor is a temperature dependent resistor (thermistor). The resistance of the thermistor decreases as the engine THERMISTOR ENGINE COOLANT TEMPERATURE NOTE: If DTC P0117 and/or P0118 are stored at the same time as DTC P0116, troubleshoot those DTCs first, then trou- Possible Cause Troubleshooting Flowchart ls176-200°F (80 - 93°C) Intermittent failure, system is OK NO Check the thermostat and the YES RESISTANCE The scan tool indicates Diagnostic Trouble Code (DTC) P0116: A range/performance problem in the Engine Coolant Temperature (ECT) sensor circuit. Engine Coolant Temperature (ECT) Sensor Main Menu Table of Contents |