Why hasn't the fuel gauge risen after refueling?

[SanIris]

There is a malfunction with the fuel level sensor. Here is an introduction to the fuel level sensor: 1. Introduction: This sensor detects the position (height) of fuel in a container by measuring the change in capacitance between the sensor housing and the sensing electrode caused by the fuel entering the container, and converts this change into a current variation. 2. Principle: The sensing part of the capacitive fuel level sensor is a coaxial container. When fuel enters the container, it causes a change in capacitance between the sensor housing and the sensing electrode. This change is converted by the circuit and undergoes precise linear and temperature compensation, outputting a 4-20mA standard signal to the display instrument.