The engine coolant temperature sensor can have a hard impact on the air-fuel mixture. The engine is very sensitive to wrong air-fuel mixtures at idle and this is a condition when you might notice that something is wrong with your engine coolant temperature sensor. This will cause the engine to vibrate or shake when the car is at low speed and lead to other power losses and strange behaviours. Poor Idlingĭue to a faulty ECT sensor, the fuel mixture will adjust. Some vehicles have a separate coolant temperature sensor for the fan, but many cars use the same sensor. If the fan receives a false signal, the fan might not turn on, causing the engine to overheat. This fan is electrically controlled and relies on the signal from the onboard computer. The cooling fan, which is behind the radiator grille, removes heat from the engine’s coolant. If the air-fuel mixture is faulty, you might find your car difficult or impossible to start. The starting moment of a car is very critical with the amount of fuel getting injected into the engine.
Engine coolant temperature sensor how to#
RELATED: Black Smoke From Exhaust (Causes & How to Fix it) Hard Start Condition The excessive fuel will burn in the exhaust pipe and will produce thick black smoke. RELATED: Radiator Fan Is Not Working? (7 Causes & How to Fix) Black Smoke from the Exhaust Pipeĭue to an incorrect engine temperature signal, the ECU may enrich the fuel mixture to a point where the combustion process becomes difficult. However, if your car has a single sensor, a bad engine coolant temperature sensor may result in your fans not starting. In most cars, you have two separate temperature sensors for the fans, dashboard gauge, and engine management. Some cars use the engine coolant temperature sensor to control the electric cooling fans. This will cause the fuel economy to drop and decrease the engine’s performance. For example, a faulty sensor can send a signal indicating the engine is cold when it is not, and more fuel will heat the engine quickly. Poor MileageĪ faulty ECT sensor can send a false signal to the onboard computer, resulting in an incorrect air-fuel mixture. If you see a check engine light on your dashboard, it is time to check the trouble codes with an OBD2 scanner.
If the computer detects any problem with the sensor’s circuit, it will illuminate the check engine light, indicating that the car needs an inspection. One of the first signs of all coolant temperature sensor symptoms you will probably notice is that the check engine light will show up on your dashboard. Here is a more detailed list of the common symptoms of a bad coolant temperature sensor. The main symptoms of a bad or failing coolant temperature sensor include: The most common symptom of a bad engine coolant temperature sensor is a check engine light on your car’s dashboard together with various engine performance issues. Is there a fuse for the coolant temperature sensor? 8 Bad Engine Coolant Temperature Sensor symptoms
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