![]() 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 amount of fuel getting injected into the engine is critical at the moment you start your car. RELATED: Black Smoke From Exhaust (Causes & How to Fix it) 5. The excessive fuel will burn in the exhaust pipe and will produce thick black smoke. 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. RELATED: Radiator Fan Is Not Working? (7 Causes & How to Fix) 4. ![]() ![]() 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, a 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 signs of a bad or failing coolant temperature sensor to look for: 1. The most common symptoms of a bad coolant temperature sensor include poor mileage, cooling fans not coming on, engine performance issues, an overheating engine, and a check engine light on your dashboard. Symptoms Of A Bad Coolant Temperature Sensor Hence, it is advised to have your car inspected immediately to avoid serious problems. Like every other component, the ECT sensor can also get damaged, resulting in several engine-related problems. With this information, the engine control module adjusts the air-fuel mixture depending on the temperature. The engine coolant temperature sensor’s job is to measure the coolant temperature for the engine control module. Take a look at our variety of How-To Hub cooling system resources for any questions you may have about vehicle cooling and coolant.An engine coolant temperature sensor is essential for the optimal performance of your car. If you need a new sensor or connector, or any other coolant system component, visit O'Reilly Auto Parts to browse our available options. Other problems might include your vehicle struggling to start after reaching driving temperature, poor fuel economy, or black smoke from the exhaust. If your vehicle overheats without warning, the coolant temperature sensor or connector may be faulty. Over time, the connector can melt or break down due to heat. The coolant temperature sensor connector secures the connection in the coolant system wiring harness. The ECU uses this data to properly adjust the fuel injection and ignition timing in your vehicle. ![]() These readings are collected by the sensor and then sent to the engine control unit (ECU). The coolant temperature sensor in your vehicle's cooling system is responsible for measuring and reading the temperature of the engine coolant. What is a Coolant Temperature Sensor Connector?
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