Is it harmful to refuel when the fuel gauge light is on?
2 Answers
Refueling when the fuel gauge light is on does not harm the car. The fuel gauge light indicates that the fuel level is low and requires timely refueling. The car fuel gauge is used to indicate the amount of fuel remaining in the fuel tank. The function of the low fuel level warning device is to immediately illuminate and alert when the fuel in the tank falls below a certain specified level, drawing the driver's attention. It is categorized into pointer-type and digital-type. The method to check a car's pointer-type fuel gauge is: 1. When the pointer is near the 'F' position, it indicates the tank is full; 2. The closer the pointer is to the 'E' position, the less fuel remains, indicating the need for timely refueling. The reasons why a car's fuel gauge does not display the fuel level are: 1. Fuel float failure; 2. Computer signal malfunction; 3. Instrument damage.
I've been driving for over a decade and often encounter the fuel gauge warning light. Actually, occasionally refueling after the light comes on doesn't cause major issues for the car, but doing this frequently is really not advisable. When the fuel light illuminates, it means the tank is nearly empty, exposing the fuel pump to air without proper cooling and lubrication from gasoline. Prolonged exposure can cause the fuel pump to overheat and fail, and replacing one can cost thousands! Moreover, debris at the bottom of the tank may get sucked into the fuel lines, clogging the fuel injectors. I've personally seen experienced drivers who habitually wait until the light comes on to refuel end up with premature fuel pump failure—definitely not worth it. I recommend refueling when there's about a quarter tank left. It protects your car and saves you hassle.
