The most common symptoms of a bad coolant temperature sensor include a check engine light on the dashboard, radiator fans working intermittently or continuously even if the engine is cold, decreased fuel economy due to bad ignition timing, engine overheating, delayed engine starting period, or rough idle. Having such an important role, it is key to know when the coolant temperature sensor is going bad. This information is then used to adjust the fuel injection parameters and to activate the cooling fans when needed. The purpose of the engine coolant temperature sensor is to measure the temperature of the coolant for the control module. How To Tell If Your Coolant Temperature Sensor is Bad The engine may also overheat because a faulty CTS will not turn on the cooling fans. Without a properly functioning coolant temperature sensor, the engine will start to rough idle due to improper fuel injection and ignition timing. This reading is also used to send an accurate reading of the engine temperature to the temperature gauge on the dashboard. With the readings from the coolant temperature sensor, the ECU monitors the temperature change of the engine and adjusts the fuel injection, ignition timing, and controls when the electric cooling fan is switched on and off. When the coolant temperature decreases, the resistance of the sensor increases. When the temperature of the coolant increases, the coolant temperature sensor resistance decreases. The coolant temperature sensor is a resistor (thermistor) that varies the voltage output as the temperature changes its operation. The coolant temperature sensor operates using electrical resistance to measure the temperature of the coolant. The coolant sensor works by measuring the temperature of the coolant and sending that information back to the vehicle’s computer so that the vehicle’s computer can make adjustments in the fuel injection, and ignition timing, and to either turn on or turn off the cooling fans. By constantly monitoring the coolant temperature, the coolant temperature sensor is able to send accurate readings of the current engine temperature to the vehicle’s computer. The coolant flows around the engine and absorbs heat and gives an indication to the sensor of how much heat the engine is giving off. The coolant temperature sensor works by measuring the temperature of the coolant in the cooling system of a car. Typically, a coolant temperature sensor has a lifespan of 100,000 miles, and replacement costs around $80.If the coolant temperature sensor is bad, the check engine light will be illuminated, the radiator fan will work more to try and cool the engine, and you may experience a decreased fuel economy, rough idle, delayed starting period, or engine overheating. The coolant sensor measures the temperature of the coolant that circulates around the engine in order to get a current engine temperature and sends this information to the vehicle’s computer.These are possible indicators that the coolant temperature sensor in the vehicle is defective and needs to be replaced. If your engine is overheating frequently.If the vehicle’s fuel consumption rises,.Possible symptoms of a damaged Coolant Temperature Sensor An expert on Cooling Systems, Valeo offers a complete cooling systems selection with its thermostats, thermoswitches and water temperature sensors.The know-how of a worldwide key player.As the temperature of the engine changes, the potential difference output of the device also changes, and this can be measured by the engine's control unit. The device follows the principle of dependence of potential difference in temperature. There are two temperature sensors in some vehicles, one to send information from the engine system to the control unit and another from the control unit to the dashboard. Depending on the car manufacturers, it is usually installed next to the thermostat or inside it. The water temperature sensor enables the control unit to identify engine overheating or an unusual rise in temperature. A 48 parts numbers range - An expert on Cooling Systems, Valeo offers a complete cooling systems range with its thermostats, thermoswitches and water temperature sensors The Temperature sensor measures the coolant temperature & sends information to the ECU.Ĭhoose Valeo water temperature sensors for: - The know-how of a worldwide key player. Valeo water temperature sensor range: Protect your engine and heat exchangers in extreme temperature conditions
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