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What does it mean when the yellow wrench light comes on in a car?

1 Answers

HeidiMarie

07/29/25 4:21pm

When the yellow wrench light comes on in a car, it is a maintenance reminder on the instrument panel. Here is some information about car instrument panels: 1. Introduction: The instruments on different car dashboards vary, but generally, conventional car instruments include the speedometer, tachometer, oil pressure gauge, water temperature gauge, fuel gauge, charging gauge, etc. 2. Condition: In modern cars, a voltage regulator is also required for the instrument panel, specifically designed to stabilize the voltage of the instrument power supply and suppress fluctuations to ensure the accuracy of the car instruments. 3. Development: Additionally, most instrument displays rely on sensors. The sensing device changes its resistance value based on the monitored object's state changes, which is then displayed through the instruments. The most prominent gauge on the dashboard is the speedometer, which indicates the car's speed in km/h (kilometers per hour). The speedometer actually consists of two gauges: one is the speed gauge, and the other is the odometer.

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