MikeGM4X4

Hi everyone,

I just got my 2004 Sierra a new kenwood deck done about 2 days ago at a shop. Today a P1125 code came up and I'm in limp home mode. Some research tells me this is the APP sensor.

My only question is this: Could an improperly installed deck cause this issue? I'm very wary because I JUST got this done. Of course its a 3 day weekend so I won't be able to talk to the music shop until Tuesday. I'm 100% stock btw.

Any input is appreciated!