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What is the function of a car fuel gauge?

2 Answers

JayceFitz

07/24/25 6:10am

Car fuel gauge can display the fuel value, fuel consumption, and storage capacity in the fuel tank in real time. If the fuel gauge malfunctions, there are the following reasons and judgment methods: 1. The problem of the fuel gauge itself. The fuel gauge itself fails, causing the fuel gauge to stop moving or become inaccurate. Judgment method: If the fuel gauge pointer does not swing about half a minute after the ignition switch is turned on, or the pointer swings randomly, or the fuel gauge pointer measurement is inaccurate. 2. Sensor failure. The sensor fails, causing the fuel gauge to stop moving. Judgment method: Use a multimeter to clamp the two terminals of the fuel sensor's variable resistor, and use the R×1Ω range to detect the resistance value of the variable resistor. If the display does not match the standard, the sensor has failed. 3. Short circuit of the instrument coil. A short circuit in the instrument coil causes the fuel gauge to malfunction. Judgment method: Use a multimeter to measure the voltage.

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ColtonFitz

08/11/25 1:55am

I always drive a sedan to commute, and the fuel gauge is extremely important to me. It shows how much fuel is left in the tank, letting me know when I need to refuel at a gas station. Just imagine how frustrating it would be if the car suddenly ran out of fuel on the highway, leading to a breakdown—wasting time and possibly causing accidents. I usually refuel when the gauge drops to a quarter to avoid the low-fuel warning light. I also use the fuel gauge to estimate fuel consumption. For example, after a full tank on a long trip, if the needle drops slowly, it means the car is fuel-efficient. Different car models have different fuel gauge designs, either digital or analog, but both are simple and easy to understand. Keeping the fuel level adequate ensures stable engine performance and reduces wear. In short, the fuel gauge is an essential tool that helps me plan trips with peace of mind and safety.

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