Circuit Description
WARNING: This page is about a different car, the 2000 Saturn LW1, 2000 Saturn LS1, and 2000 Saturn LS. However, it is still accessible from the selected car via links, so may be relevant.
PCM monitors resistance of fuel level sensor to calculate amount of fuel in the tank and provides voltage to fuel level sensor through a resistor network and a return to PCM ground.
DTC will set if fuel level changes by less than 1.6 percent while driving 120 miles.