Transmission Temperature Sensor/Switch: Description and Operation

The Transmission Fluid Temperature (TFT) sensor is a thermistor which changes value based on the temperature of the transmission fluid. A high transmission fluid temperature may cause the vehicle to operate in Hot Mode. While in Hot Mode, shift points may be altered, 4th gear disabled, and TCC forced ON in 2nd gear.

A failure in the TFT sensor or associated wiring should cause DTC P0712 or P0713 to set. In this case, engine coolant temperature will be substituted for the TFT sensor value, and the transmission will operate normally.