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Why is the fuel gauge inaccurate when refueling?

1 Answers

RafaelRose

07/29/25 7:39pm

There are several reasons why the fuel gauge may be inaccurate when refueling: 1. Poor contact or severe wear of the fuel level sensor's sliding resistor; 2. Abnormal instrument circuit or loose/aged electrical components; 3. Deformed fuel tank or abnormal bracket; 4. Poor contact or open circuit inside the engine module; 5. Loose grounding wire of the vehicle's fuel level sensor or fuel pump wiring harness. The fuel gauge consists of a stabilized fuel level indicator and a fuel level height sensor, whose function is to immediately illuminate an alarm when the fuel quantity in the tank falls below a specified value to alert the driver. Precautions for using the fuel gauge include: 1. Do not wait until the warning light comes on to refuel; 2. It is not recommended to fill the tank completely when refueling.

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