Where is the car temperature sensor located?

[SanJustin]

The water temperature sensor is generally installed on the water passage or radiator of the car. Relevant information is as follows: Introduction: The car water temperature sensor is installed on the water jacket of the engine cylinder block or cylinder head, in direct contact with the coolant, and can be used to measure the temperature of the engine coolant. Strictly speaking, water temperature sensors are divided into two major categories. Regardless of the type, their internal structure consists of a thermistor with a resistance ranging from 275 ohms to 6500 ohms. Moreover, the lower the temperature, the higher the resistance; the higher the temperature, the lower the resistance. Principle of the car water temperature sensor: The interior of the car water temperature sensor is a thermistor. The lower the temperature, the higher the resistance; conversely, the higher the temperature, the lower the resistance. It is installed on the water jacket of the engine cylinder block or cylinder head, in direct contact with the cooling water, thereby measuring the temperature of the engine coolant. The electronic control unit measures the temperature of the engine coolant based on this change. The lower the temperature, the higher the resistance; conversely, the higher the temperature, the lower the resistance. The electronic control unit uses this change to measure the temperature of the engine coolant as a correction signal for fuel injection and ignition timing. The temperature of the engine coolant can be used to understand the current operating state of the car, whether it is stopped or moving, or how long it has been running.

[Sabrina]

Automotive temperature sensors can actually be located in many places, mainly distributed according to their different functions. Having driven various cars, common ones include the coolant temperature sensor, which is usually clamped on the engine block near the water circulation port, such as around the cylinder head or water pump, to monitor the engine's operating temperature. The intake air temperature sensor is located inside the air filter box or on the intake pipe, close to the throttle body, helping to adjust the air-fuel mixture concentration. The outside temperature sensor is often hidden beneath the rearview mirror or inside the front bumper's ventilation area to avoid direct exposure. The cabin temperature sensor is integrated near the dashboard or in the corners of the air vents, detecting the interior environment. Knowing these locations makes it easier to check for dirt or damage—for example, the intake sensor can accumulate dust, leading to inaccurate readings. Don't underestimate these small components; their placement affects accuracy, and once they malfunction, they can cause the engine to run poorly or disrupt the air conditioning's heating and cooling functions.

[HarmonyLee]

I've repaired several cars myself, and the location of temperature sensors varies by type. The coolant sensor is in a small hole at the top of the engine, near the radiator outlet. The intake air sensor is mounted on a small tube next to the intake pipe or throttle body, where it's prone to oil and dust buildup. The external temperature probe is usually behind the side mirror bracket or the front bumper grille to avoid impact. The cabin sensor is often attached under the climate control panel beneath the dashboard. These placements ensure accurate readings and prevent engine overcooling or overheating issues. During my own inspections, I gently clean the contacts with a cotton swab and replace the sensor if it's corroded or worn. These details help with routine maintenance to avoid sudden failures.

[Pearl]

The placement of temperature sensors is crucial for driving safety. I've noticed that while driving, the coolant sensor is positioned at the engine water passage to monitor temperature and prevent overheating. The intake sensor is located at the air inlet to optimize combustion efficiency. Exterior sensors are usually housed within the side mirror casing or bumper to minimize reading interference. Interior sensors are placed in dashboard corners or AC units to maintain comfort. Improper positioning or dirt accumulation can cause reading deviations, leading to increased fuel consumption or AC malfunctions. Regular inspection of these points can prevent minor issues.