Action Taken When the DTC Sets

WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

DTC P0120, P0122, P0123, P0220, P0222, P0223, and P2135 are Type A DTCs.
The ECM commands the TAC system to operate in the Reduced Engine Power mode.
A message center or an indicator displays Reduced Engine Power.
Under certain conditions the ECM commands the engine OFF.