Conditions for Setting the DTC

WARNING: This page is about a different car, the 2004 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.

Fuel level sensor voltage for the left/primary fuel level sensor is below 0.39 volts.
The fuel level signal is less than 3.5 percent.
The above conditions are present for greater than 2 minutes.