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What Causes the Red Light to Illuminate When the Temperature Gauge Shows Normal?

1 Answers

SanAlex

07/25/25 8:51am

It may be caused by unstable voltage, requiring inspection of the temperature sensor and related wiring for looseness or poor contact. Below is relevant information about the temperature gauge: 1. Introduction: The engine coolant temperature sensor, also known as the water temperature sensor, is typically installed in the water jacket of the engine block or cylinder head, or inside the thermostat and extends into the water jacket. The coolant temperature sensor is used to detect the temperature of the engine coolant. The engine electronic control unit (ECU) adjusts the injection time, ignition timing, idle speed, etc., based on this signal. It also serves as a control signal for other systems such as the fan clutch. 2. Classification: There are many types of temperature sensors, such as thermistor type, semiconductor type, and thermocouple type. A thermistor is a resistor whose resistance changes with temperature. A resistor whose resistance increases with rising temperature is called a positive temperature coefficient (PTC) thermistor; conversely, a resistor whose resistance decreases with rising temperature is called a negative temperature coefficient (NTC) thermistor. The negative temperature coefficient (NTC) thermistor type temperature sensor is commonly used in automobiles.

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Where to Register a New Car in Fuzhou?

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