What is the reason for the car fuel gauge not displaying?
2 Answers
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.
I found it quite annoying that the fuel gauge isn't working. Possible causes include a faulty fuel level sensor, which is the component that detects the amount of fuel in the tank; a blown fuse, which can be easily found in the fuse box; or a short circuit or broken wire preventing the signal from being transmitted; the dashboard itself might be damaged; or the fuel tank float could be stuck. I remember once when I encountered this issue, I first checked the fuse, and replacing it with a new one fixed the problem; if that didn't work, I'd then inspect the sensor, but that requires a professional mechanic. The key is not to wait—if the fuel gauge stops working, you won't know how much fuel is left, and running out of gas in the middle of the road can be troublesome, especially on the highway where it's dangerous. So, if you notice the problem, head to the repair shop right away to ensure safe driving, and while you're at it, have the entire electrical system checked to prevent future issues.
