Conditions for Setting the DTC
WARNING: This page is about a different car, the 2006 Buick LaCrosse and 2006 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
The ECM detects the TP sensor angle is less than 1.8 percent or more than 13.1 percent for more than 4 seconds, when the throttle actuator control motor is deactivated.