What Causes the Car Temperature Gauge to Alarm When the Temperature Isn't High?

1 Answers
LaHaley
07/30/25 7:59am
Car temperature gauge alarming when the temperature isn't high is caused by a faulty sensor, and replacing it can resolve the issue. Below are detailed explanations about the car temperature sensor: Introduction: The internal component of the car temperature sensor is the car temperature sensor itself. The lower the temperature, the higher the resistance; conversely, the resistance decreases. It is installed in the water jacket of the engine block or cylinder head, in direct contact with the coolant, thereby measuring the engine's coolant temperature. Structure: The car temperature sensor is installed in the water jacket of the engine block or cylinder head, in direct contact with the coolant, and is used to measure the engine's coolant temperature. The temperature gauge uses a negative temperature coefficient thermistor, whose resistance decreases as the temperature rises. It has a wire connected to the Engine Control Unit (ECU).
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