Coolant Sensor

Coolant temperature sensor or engine temperature sensor serves to take engine’s temperature. As a rule, sensor is a thermistor – an electronic component resistance of which reduces when temperature rises. Resistance can be easily measured and on the basis of it you can determine and display temperature. Due to coolant temperature sensor driver always knows what is the temperature of the engine. It is very important to prevent overheating. In addition, you can control fuel quantity using engine temperature sensor. Warmed-up engine consumes less fuel then the cold one. 

If temperature indicator shows meaningless figures, it’s most likely that the coolant temperature sensor failed. If there are no figures at all, it is possible that indicator failed or a wire is disconnected. In any case it is necessary to repair it immediately, because engine overheating may have grave consequences. As a rule, heat sensor is screwed in cylinder head. The most difficult task for an inexperienced motorist is to find where exactly the sensor is situated. The substitution itself is not difficult and may be done rather quickly. 

It is necessary to disconnect wires, then to remove failed sensor and to place instead of it a new one. Then connect wires. Before this it is necessary to clean connections, especially if there is rust. The easiest way to check its functionality is a test drive. There is a big variety of car parts in our Internet shop, you can find here many parts for your car. Here you can buy ignition plugs, stub axles, brake blocks, fenders, air filter, back lights, headlamps, oil filter, bearings and many other car parts at reasonable prices. We do not save on quality!

HOW TO DETECT COOLANT TEMPERATURE SENSOR MALFUNCTION

The temperature value shown by the sensor must correspond to the engine temperature. If the part indicates high temperature while the engine is cool, and low temperature when the engine is hot, then the part is faulty. Checking of the sensor voltage must be performed by using a voltmeter. The voltage value of a cool part must be 3V on the average. The voltage must decrease to 0.5V if the temperature increases. If the inspection has detected that the voltage level is exceeding the norm, it means that there is no grounding. If the value is zero, then there is no input voltage or the wiring is short-circuited.