Is the Yellow Water Faucet Light on the Dashboard Serious?

[MacMaverick]

The yellow water faucet light on the dashboard is not serious. The water faucet symbol is the engine knock indicator. When the yellow light of the water faucet symbol is on, it indicates a common fault in the car's engine. Since it is a yellow light, the fault is not very severe. If it were a red light, the situation would be more serious, requiring immediate stopping and inspection. The relevant introduction to the knock sensor is as follows: Introduction to the Knock Sensor: The knock sensor is installed in the middle of the engine block to measure the degree of engine vibration. It adjusts the ignition timing when engine knock occurs. Working Principle of the Knock Sensor: The knock sensor is an AC signal generator, but it differs significantly from most other automotive AC signal generators. In addition to detecting the speed and position of the rotating shaft like the magnetic crankshaft and camshaft position sensors, it also detects vibration or mechanical pressure. Unlike stators and reluctors, it is usually a piezoelectric device. It is composed of special materials that can sense mechanical pressure or vibration (such as generating AC voltage when engine knock occurs).