Gradually apply pressure to the sensor while turning it in a counterclockwise direction. Use a deep socket and ratchet wrench to loosen the sensor. The coolant temperature sensor is installed much like a spark plug. Pull the wire and set it in a place where it is out of the way. Pry off the clips with a flat screwdriver without breaking the tabs. If there are any problems with the wire you will need to replace it. Depending on how this is attached you will need to take care when removing it. The sensor sends its signals along a lone lead wire that is located at the top of the terminal. The sensor will have a terminal exposed with a single wire coming from it. You may need to remove the fan shroud in order to see into the space. Hold a drop light over the area and locate the sensor. However, the sensor is still located amongst the pulley system. This will vary on some cars where the pulleys are located on the side of the vehicle. The coolant temperature sensor is located on the front of the engine block. Step 2 - Locate Coolant Temperature Sensor Use the hood support to make sure that the hood is secure and will not fall on you when you let go of it. Next, put your hand in the gap under the center of the hood to feel for the latch. Instead, tow it to the nearest service station for repair.On a newer car, locate the hood release beneath the steering wheel inside the car. If there is a noticeable leakage, do not drive the car in that condition. Stop the car and look for any coolant (usually green colored) leakage. Engine temp indicator showing an over-heated engineįurthermore, it is not safe to drive a car with the indicator light ‘H’ on. As it may cause further damage and/or seize the engine. Also, if the engine temperature goes above the prescribed levels (usually above 100 o C), another symbol – a High-Temperature indicator light ‘H’ lights up in red color indicating that the engine is over-heating. If you see that the engine temperature symbol ‘C’ is lit continuously and does not disappear after some time it indicates that there is some problem in the engine’s cooling system. What to do if the engine temperature sensor fails? It may also fail if the coolant leaks through its wiring connector. This is because of its exposure to engine coolant. In most cases, the engine temperature sensor fails due to corrosion. It should automatically disappear once the engine warms up to its optimum temperature (usually within 2/3 Kilometers of the drive). Upon turning the ignition ‘ON’, the letter ‘C’ also lights along with the temperature symbol indicating that the engine is cold. Engine temperature indicators as seen in the instrument cluster Instead, there is a tiny ‘light’ symbolizing the engine temperature which is integrated with rpm-meter. In modern cars, you will notice that there is no separate engine temperature gauge. The engine temperature sensor connects either to the temperature gauge or to the temperature indicator in the dashboard. The position of the engine temperature sensor Where is the Coolant Temperature sensor located?Įngine Coolant Temperature sensor is primarily located in the coolant passage of the liquid cooled engine typically near the thermostat valve. Based on this data, the ECU also controls the additional functions such as switching on / off the engine cooling fan. The data from the engine temperature sensor provides readings for engine temperature gauge on the dashboard. ECU, in turn, adjusts and regulates the fuel quantity & ignition timing. The engine temperature sensor informs the engine’s ECU about the current & ongoing variations in the engine temperature. This is because a cold engine requires a rich air-fuel mixture whereas the engine running at optimum operating temperature requires a lean mixture. Many critical engine functions such as selection of air-fuel ratio, fuel injection timing, ignition timing etc. The engine temperature sensor is a type of sensor that changes its resistance with temperature. Engine Temperature sensor How does an Engine Temperature Sensor work? Thereby, it gives an indication of the temperature of the engine. The Engine Temperature Sensor accurately measures the engine coolant temperature.
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