The fuel pump icon displayed on the dashboard indicates that the fuel level is critically low and requires immediate refueling. This icon serves as the fuel warning light, which typically illuminates when the fuel level drops to a low position, alerting the driver to refuel promptly. Under normal circumstances, it is recommended to refuel when the fuel gauge shows one-quarter of the tank remaining. Waiting until the fuel warning light comes on before refueling can potentially damage the fuel pump. This is because when the fuel warning light illuminates, it usually means the fuel level has dropped below the fuel pump, and the tank is nearly empty. At this point, sediment accumulated at the bottom of the tank may be drawn into the fuel system, leading to clogged fuel lines or a blocked fuel pump. Additionally, since the fuel pump is located inside the fuel tank and relies on gasoline for cooling, consistently refueling at low fuel levels can shorten the fuel pump's lifespan. Furthermore, when refueling, avoid filling the tank to the brim or until the pump automatically stops ("clicking off"). Overfilling can cause fuel to expand and overflow due to thermal expansion. Excessive fuel can also damage the charcoal canister, as surplus gasoline may flow into the canister along with fuel vapors, causing malfunctions. A damaged charcoal canister cannot effectively filter fuel vapors, potentially allowing gasoline to enter the vehicle's interior, which poses a significant safety hazard.
