![]() Frequent overheating can damage the engine and lead to expensive repairs, so it’s essential to address this symptom promptly. This is because the sensor could send incorrect temperature readings to the ECU, which would then fail to activate the cooling fans. If the sensor is faulty, the temperature reading on your dashboard may fluctuate erratically, stay at one extreme, or even fail to rise above a cold reading even when the engine has been running for some time. Irregular Temperature ReadingsĪ properly functioning sensor should provide a gradual increase in temperature reading as the engine warms up. The sensor, being a key communicator in the engine management system, can manifest its failure through various symptoms. Signs and Symptoms of a Faulty Coolant Temperature Sensor These can range from inefficient fuel consumption and poor engine performance to engine damage in extreme cases. If the sensor fails or sends incorrect signals, it can cause the ECU to make incorrect adjustments, leading to several engine issues.
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