Conditions for Setting the DTC

WARNING: This page is about a different car, the 2008 Buick LaCrosse and 2008 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.

The ECM detects a difference between the engine consumed fuel and change of the fuel level signal of less than 1L (0.264 gallons) over a range of 30L (7.92 gallons) or 45 .6 percent of the fuel tank.
The above condition is present for greater than 300 seconds.