Action Taken When the DTC Sets: Notes

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.

DTCs P2122, P2123, P2127, P2128, and P2138 are Type A DTCs.
The ECM commands the TAC system to operate in a Reduced Engine Power mode.
The ECM commands the reduced engine power indicator ON.