Coolant-temperature Sensors

Coolant-temperature Sensors

Coolant-temperature sensors are electronic devices that measure the temperature of the engine coolant in a vehicle. They are typically located near the engine's thermostat housing or on the engine block itself. The sensor works by sending a signal to the engine control module (ECM), which then adjusts the air/fuel mixture and ignition timing based on the temperature of the coolant. This is important because the engine's performance and fuel efficiency are heavily dependent on the temperature of the coolant. There are two types of coolant-temperature sensors: thermistor and thermocouple. Thermistor sensors are the most common and work by changing their resistance in response to changes in temperature. Thermocouple sensors, on the other hand, generate a voltage that is proportional to the temperature of the coolant. Both types of sensors are highly accurate and reliable. Coolant-temperature sensors play a crucial role in ensuring that the engine operates at the optimal temperature. If the sensor fails or malfunctions, it can cause a variety of problems, including reduced fuel efficiency, poor performance, and even engine damage. Therefore, it is important to regularly check and replace the sensor if necessary.

engine coolant, electronic devices, engine control module, thermistor, thermocouple

— Christopher Jones

CITATION : "Christopher Jones. 'Coolant-temperature Sensors.' Design+Encyclopedia. https://design-encyclopedia.com/define/coolant-temperature-sensors?E=311452 (Accessed on October 13, 2026)"