Conditions for Setting the DTC: P2138
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 APP sensor 1 and APP sensor 2 disagree greater than 4.5 percent for less than 1 second.
OR
The ECM detects that both APP sensor 1 and APP sensor 2 are 4.5 percent greater than the learned minimum position for less than 1 second.