How Does a Coolant Temperature Sensor Works?
Usually, the coolant temperature sensor is located very close to the engine’s thermostat and the sensor is designed to record the temperature of the coolant by measuring the liquid directly or connecting to the thermostat. On a regular basis, the temperature is sent through to the computer which will decide if it is in the optimal range and if not, alterations are made to other components to help achieve this.
In a worst-case scenario, the computer could switch off the engine, but usually it will send a signal to activate the cooling fan, or may even adjust the fuel to air mixture within the combustion chamber. The computer will then continue to monitor the data provided by the sensor to see if such changes made the necessary difference and if not, to continue with other options. All this action takes place within a very short time span and is part of a constant process and if a fault develops or the computer is not able to adjust operating conditions effectively, it will also activate a warning light on the dashboard to inform the driver.