I can't get my truck to go, all it will do is idle?

If you are accelerating and the RPMs are not going up then it sounds like you either have a throttle position sensor issue or possible communication network corruption.

Can you tell us what specific codes you have? If the list is long, can you just take some pictures of the scan tool screen and that will be easier then typing them all out?

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Here is a guide that will help with network issues which is what I suspect we have:

https://www.2carpros.com/articles/can-scan-controller-area-network-easy

Let us know and we can go from there. Thanks

You said you have a tuner on the vehicle?

If so, that is going to be the cause of the P0606, P0600, P060B.

The U0422 is just saying that there is communication issues which would be the case since it appears the PCM cannot communicate or is damaged.

Also, the P2122 is for the accelerator pedal position sensor as I suspected.

So let's start with what aftermarket components you have installed on this. Can you remove them and retest the operation of the vehicle?

Please see the info below.

Okay. The cold air intake is clearly fine. What exactly do you mean by a timer? Is this something that plugs into the DLC? Can you get a picture of it so I can better understand?

However, if this all checks out then I suspect the PCM is the issue.

Got it. If you happen to not have it at the shop yet, try taking the tuner off and see if it still does it. I have seen when these fail and cause all sorts of issues.

If not, please let us know what this turns out to be. Thanks