What is the reason for the failure of the Passat fuel gauge pointer?
1 Answers
The main reason is the damage to the fuel level sensor inside the fuel tank, and replacing it can solve the problem. Below are the relevant details: 1. How the fuel gauge works: There is a float (fuel float) inside the car's fuel tank, which drives a sliding resistor. As the fuel level in the tank changes, the potential at the measuring terminal also changes. The car's instrument processes this signal for display, and the corresponding displayed value is the remaining fuel in the tank. 2. The function of the fuel gauge: The fuel gauge primarily displays the remaining fuel level to prevent the car from stalling midway and to prompt timely refueling. It uses a fuel level sensor to transmit signals, which is a damping-type sensor that relies on the up and down movement of the fuel float to alter the transmitted signal.