Depends entirely on the make an model.
Sensors may even move between model years.
Generally, the sensor will be on the block, and will sense water temps before they head to the thermostat.
location for 2003 chevy trailblazer coolant temperature sensor
location of 2003 cadillac coolant temperature sensor
Location of coolant temperature sensor on a 2003 Mercury Grand Marquis?Read more: Location_of_coolant_temperature_sensor_on_a_2003_Mercury_Grand_Marquis
he radiator
Coolant Temperature Sensor/Switch (For Computer)Engine, Left Front
where is the coolant sensor on a 1984 s10 blazer 2.8 6 cylender
The temperature sensor for the coolant system is located on the front of the engine. The exact location of the coolant temperature sensor is dependent upon the year of the engine.
Coolant Temperature Sensor/Switch (For Computer) ECCS Component Parts Location
The 2005 Chevrolet Equinox coolant temperature sensor can be found on the front of the engine. The coolant temperature sensor will be approximately 2 inches above the thermostat housing.
driver side head
Most likely near the thermostat housing
on the right side of the engine