Circuit/System Description
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 commanded throttle position is compared to the actual throttle position based on the accelerator pedal position and possibly other limiting factors. Both values should be within a calibrated range of each other. The powertrain control module (PCM) continuously monitors the commanded and the actual throttle positions. If the commanded and the actual positions are not within a calibrated range of each other, DTC P2101 sets.