How Do You Replace Coolant Temperature Sensors?
Coolant temperature sensors are located on or near the thermostat housing. They are used by the computer for several things. They are used to sense the temperature of the engine at the computer to adjust the fuel mixture. When the computer senses that the engine is cold through the use of the sensor it will increase the on-time of the injector. This enriches the fuel mixture the same as using the choke. It also uses the sensor to determine when to turn the engine cooling fans on and off. Allow the engine to cool to the touch. Place the drip pan under the radiator pet-cock. Open and let about 1 gallon of antifreeze to drain before closing. Disconnect the electrical connector on the coolant temperature sensor. Remove the sensor with the appropriate wrench (the size will depend on the year, make and model of your car). Install Teflon tape around the threads of the new coolant temperature sensor. Install the coolant temperature sensor and tighten just enough to feel that it is tight. Do no
