Thread: 05 Base Pontiac Grand Prix P1125 / P2138 *** Update***

I have an 05 GP that is displaying codes P1125, P2138 and has the reduced engine power light as well as the engine light on. I have replaced the accelerator pedal with a new unit and a used TB because of limited funds. However, the car is having the same problem and showing the same codes. From all of my research, no one has posted their fix.

Thanks for all replies in advance.


Note: Replaced used ETB with new Hitachi & 6 Irridium spark plugs. Running like a champ.