The water temperature sensor, also known as the coolant temperature sensor or engine temperature sensor, is an important component of the engine's cooling system. It measures the temperature of the engine coolant and provides this information to the engine control unit (ECU) to ensure proper engine performance and fuel management
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Inaccurate temperature readings: The sensor may provide incorrect temperature readings to the ECU, leading to inaccurate temperature readings on the dashboard gauge or temperature display.
Fluctuating temperature gauge: The temperature gauge on the dashboard may fluctuate erratically or show inconsistent readings, indicating a problem with the water temperature sensor.
Engine running hot or overheating: A malfunctioning water temperature sensor may not accurately detect the actual coolant temperature, leading to improper cooling system operation and potential engine overheating.
Poor fuel economy: A faulty water temperature sensor can cause the engine to run too rich or too lean, resulting in decreased fuel efficiency.
Hard starting or stalling: If the sensor provides incorrect temperature information to the ECU, it may affect the air-fuel mixture and ignition timing, causing difficulty in starting the engine or random stalling.
Check Engine Light (CEL) illuminated: A defective water temperature sensor can trigger the Check Engine Light on the dashboard. This may be accompanied by an engine temperature-related fault code when diagnosed using an OBD-II scanner.
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