Why is the fuel gauge display inaccurate?

[TannerAnn]

The reason for the inaccurate fuel gauge display is a problem with the fuel level sensor. Generally, this occurs due to contamination on the fuel level sensor, which requires timely cleaning. Since gasoline contains many impurities and the fuel level sensor is constantly immersed in it, over time it becomes contaminated, directly affecting the accuracy of the indication. Several main factors affecting fuel gauge readings include: Poor quality of the fuel level sensor: The fuel level sensor is essentially a variable resistor. Currently, thick-film printing technology is commonly used to print resistive materials onto a ceramic substrate. If the resistive material itself is of poor quality (e.g., using carbon-based resistive paste instead of metal-based resistive paste), the sensor is particularly susceptible to fuel influence. If there is sticking, or the pivot hole is too small or too large: An irregularly shaped fuel tank can cause mechanical obstruction of the fuel float, leading to inaccurate data from the fuel level sensor. Cleanliness of the fuel itself: When using fuel with high impurity levels, the readings will become unstable.