Conditions for Setting the DTC

WARNING: This page is about a different car, the 2005 Buick LaCrosse and 2005 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.

The ECM detects that the difference between the commanded and the actual throttle plate position is more than 4 percent, or up to 50 percent depending on the rate at which the throttle position changes.
The condition exists for less than 4 seconds.