Normal Conditions
WARNING: This page is about a different car, the 2006 Mercury Mariner and 2006 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
The low fuel indicator turns on when the fuel level reaches a predetermined level, typically 1/8 tank. The low fuel level warning indicator and fuel gauge are controlled by the instrument cluster based on the fuel level data provided by the fuel pump module.