Where is the car temperature sensor located?

1 Answers
RafaelLee
07/28/25 2:54pm
Automotive engine temperature sensors are generally installed on the cylinder head of the engine. If it is an ambient temperature sensor, it is usually installed in front of the radiator, inside the bumper. The temperature sensor can detect the internal temperature of the engine. Most vehicles are equipped with a thermostat, so the temperature is typically controlled at 90 degrees, which is the optimal operating temperature for the engine. Due to the variety of sensor types and models, sensors can be contact or non-contact. Contact sensors are usually installed near the controlled object, while non-contact sensors may not necessarily be installed near the controlled object. The internal part of the automotive water temperature sensor is the car water temperature sensor. The lower the temperature, the greater the resistance; conversely, the smaller the resistance. It is installed on the water jacket of the engine block or cylinder head, in direct contact with the coolant. This allows the engine coolant temperature to be measured. The electronic control unit (ECU) detects the engine coolant temperature based on this change—the lower the temperature, the greater the resistance; conversely, the smaller the resistance. The ECU uses this change to measure the engine coolant temperature as a correction signal for fuel injection and ignition timing. Simply put, it allows understanding the current operating state of the car—whether it is stopped or moving, or how long it has been running—through the engine water temperature.
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