As the title says, I am having issues with P2122.

P2122- The ECM detects that the APP sensor 1 voltage is less than 0.13 volt for more than 0.4 second

I have replaced the gas pedal for the second time. First time it was a used one, so I got one new this time. That cleared the code for a few days.

Lights back on now along with being in limp mode.

I checked the wires going from the connector back to the firewall, and they looked good.

Checked the ECM, and it also looked good.

Am I missing something? Starting to think it might be the throttle body.

I have an ls4, I read somewhere that if you turn the key to the on position, and tap the gas, if it makes any noise its bad? I don't know how true that is. But I did try it, and it makes an obnoxious clicking sound followed by a buzzing sound. I am tuned for it, and have the spacer.

Is there a fuse some where for either? or anything else I should check? I assume the last thing I could do is either replace the throttle body, or run new wires from the ECM to the pedal (which I really don't want to do).

Thanks guys.

 

I went thru this on several 05 MY cars. replaced TB and pedal, that fixed one. the other 2 needed new PCMs

 

ah ****. That's what I didn't want to hear.
Guess throttle body is next.
If that doesn't fix it, guess itll be time to get hptuner and a new PCM.

 

Could I just test the throttle body using my stock one? Im tuned for the ls4, so not sure if that would effect how the PCM reads the voltage.

 

Well, my buddy and I found where the wire had been patch fixed once. Seems to be running along side of the oil cooler, and causing it to short, we think.

Guess it is time to replace the wire. Might just pull the harness and do a pcm relocate/wire tuck.