The fuel gauge not rising after refueling can be caused by various reasons, primarily dependent on the operation of the fuel level sensor. If the fuel gauge pointer does not rise after refueling, there could be several possible reasons:
1：Instrument Malfunction:
If it is determined that there is a problem with the internal mechanical structure of the instrument, repairing or replacing the entire instrument assembly can restore the normal function of the fuel gauge.
2：Poor Grounding in the Circuit:
The fuel level sensor in the fuel tank works in conjunction with the fuel float to convert the height of the fuel level into an electrical signal feedback to the instrument. If there is poor grounding in the circuit, the electrical signal transmission may be disrupted, leading to the fuel gauge pointer not rising. In this case, repairing the grounding issue is necessary to ensure smooth signal transmission.
3：Deformation of the Float Rod or Fuel Tank:
Deformation or damage to the float rod or fuel tank can prevent the fuel float from accurately indicating the height of the fuel in the tank, resulting in the fuel gauge pointer not rising. The solution is to replace or repair the damaged float rod or fuel tank.
4：Sticking of Sliding Resistance in the Fuel Level Sensor:
The sticking of the sliding resistance in the fuel level sensor can cause the electrical signal value to remain unchanged, resulting in a constant display of the remaining fuel level. To address this issue, it is necessary to repair the sliding resistance in the fuel level sensor to ensure its proper operation.
5：Mismatched Resistance Values Between the Fuel Level Sensor and Instrument:
The matching of resistance values between the fuel level sensor and the instrument is a more complex issue. While the previously mentioned reasons can be addressed through simple testing and repairs, the matching of resistance values may pose difficulties in maintenance if the design is improper. In such cases, it is advisable to consult with a professional technician for an appropriate solution.
