Engine Coolant Temperature (ECT) Sensor

DESCRIPTION
The Engine Coolant Temperature (ECT) sensor detects temperature of engine coolant and supplies the information to the Powertrain Control Module (PCM). The ECT sensor is used to control Torque Converter Clutch (TCC) operation. The ECT is installed in the heater outlet fitting or cooling passage on the engine. For engine control applications, the ECT signal is used to modify ignition timing, EGR flow and air-to-fuel ratio as a function of engine coolant temperature.

SYMPTOMS
Torque converter clutch will always be OFF, resulting in reduced fuel economy.

DTCs
P0117, P0118, P1116, P1117.