Normal Operation
WARNING: This page is about a different car, the 2005 Lincoln LS. However, it is still accessible from the selected car via links, so may be relevant.
Typically, the low fuel indicator turns on when the fuel level reaches a predetermined level of approximately 1/8 tank. The low fuel level warning indicator and fuel gauge are controlled by the instrument cluster based upon the fuel level data provided by the rear electronic module (REM). When the instrument cluster receives data from the REM that indicates the fuel level has reached the preset low fuel level, the fuel gauge indicates low fuel and the instrument cluster turns on the low fuel warning indicator. A correctly functioning fuel gauge indicates that the fuel pump modules, the circuitry to the REM, and the REM are operating correctly.