When Monitored and Set Condition:
WARNING: This page is about a different car, the 2004 Dodge Pickup and 2004 Dodge Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
When Monitored: Ignition on and battery voltage above 10.4 volts.
Set Condition: The Fuel Level Sensor signal voltage goes below 0.2 of a volt at the PCM for more than 5 seconds.