Conditions for Setting the DTC: P2128
WARNING: This page is about a different car, the 2008 Suzuki Swift +, 2008 Pontiac Wave, and 2008 Chevrolet Aveo. However, it is still accessible from the selected car via links, so may be relevant.
The ECM detects that the APP sensor 2 voltage is greater than 4.8 volts for less than 1 second.