What is the reason for the engine light being on and the water temperature gauge not responding?

1 Answers
KennedyLynn
07/30/25 8:31am
Engine light being on and the water temperature gauge not responding can be due to the following reasons: Aging of the water temperature sensor: The car's water temperature sensor may be faulty or aged, or there could be an issue with the water temperature sensing plug. If the water temperature sensor has been used for a long time, its properties and functions may change, leading to incorrect water temperature signals. This can adversely affect fuel injection, ignition timing, and the operation of the fuel pump. However, such changes in the sensor's properties (not short circuits or open circuits) are often not recognized by the self-diagnosis system. Issues with the water temperature sensor circuit: Problems with the circuit or the water temperature gauge pointer itself being faulty can cause the water temperature gauge to remain unresponsive. It is necessary to promptly visit a 4S shop for replacement or repair.
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