Conditions for Setting the DTC: P2138

WARNING: This page is about a different car, the 2009 Pontiac Torrent and 2009 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.

The ECM detects that the voltage difference between APP sensor 1 and 2 is greater than 0.23 volt.
The ECM detects that the voltage difference between APP sensor 1 and 2 is greater than 0.29 volt with a partially pressed pedal.
The ECM detects that the voltage difference between APP sensor 1 and 2 is greater than 1.66 volts with a fully pressed pedal.
Any of the above conditions exist, then a 5 second delay for MIL ON.