Conditions for Setting the DTC: P0220
WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.
The ECM detects that TP sensor 2 voltage is less than 0.35 volt or more than 4.59 volts for more than 0.5 second.