What does the fuel gauge symbol EF on the car dashboard represent?
2 Answers
The fuel gauge symbol EF on the car dashboard indicates the current fuel level in the tank. 'E' stands for 'empty', meaning when the fuel gauge needle points to E, the dashboard will illuminate the fuel warning light to remind the driver to refuel soon. 'F' stands for 'full', indicating that when the tank is completely filled, the needle will point to F. The working principle of the fuel gauge is similar to having a float inside the fuel tank. The float sends different signals at different positions, and the dashboard displays the current fuel level based on these signals. When driving on bumpy roads or slopes, the fuel gauge needle may fluctuate and the fuel warning light may illuminate. This occurs because the vehicle's movement causes changes in the float's height position. Therefore, to accurately check the fuel level, the vehicle should be on flat ground.
I've been repairing cars for over a decade, and the most common explanation for the EF fuel gauge symbol is that the fuel is about to run out. E stands for Empty, and F stands for Full. The EF intermediate state is actually a final warning for you to refuel. Different brands and models have slightly different warning logic—German cars often display the EF symbol when the remaining range is below 50 kilometers, while Japanese cars might only show it at 30 kilometers. Last time, a car owner mentioned driving 40 kilometers after the EF light came on, only to have the fuel pump burn out. It's advisable not to risk long-distance driving after the light comes on. Always refuel with gasoline from reputable gas stations, as keeping the fuel level below 1/4 for extended periods can accelerate carbon buildup in the fuel system.
