Engine Coolant Temperature (ECT) Sensor

DESCRIPTION
The engine coolant temperature sensor (ECT) detects temperature of engine coolant and supplies information to the powertrain control module. The engine coolant temperature sensor is installed into the heater outlet fitting or cooling passage on the engine. For engine control applications, the ECT signal is used to modify ignition control, EGR flow and air-to-fuel ratio as a function of engine coolant temperature. On electronic instrument clusters, the ECT output is used to control the coolant temperature indicator. The ECT sensor is used to control torque converter clutch operation.
SYMPTOMS
Torque converter clutch will always be off, resulting in reduced fuel economy.
DTC's
P0117,P0118,P1116,P1117