What is the reason for the car fuel gauge not displaying?

1 Answers
DanteFitz
07/30/25 7:59am
Car fuel gauge not displaying is caused by a faulty fuel level sensor. Here are the specific details about the fuel level sensor: Principle: The sensing part of the capacitive fuel level sensor is a coaxial container. When fuel enters the container, it causes a change in the capacitance between the sensor housing and the sensing electrode. This change is converted by the circuit with precise linear and temperature compensation, outputting a 4-20mA standard signal to the display instrument. Function: This sensor detects the position (height) of fuel in the container by utilizing the change in capacitance between the sensor housing and the sensing electrode when fuel enters the container, and converts this change into a current variation.
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