Today I drove to dinner in my 6.7 with no problems then on the way home my brother said he noticed my truck was white smoking quite a bit and he said there was a very strong exhaust smell coming from my truck ( he was in his car behind me) I ran a diagnostic test and what came up was code P0401 (I believe thats right) Can anyone help to see figure out what is going on with my truck before I take it to the mechanics and get charged up the ***. The truck still has DPFs in it just has a DPF back exhaust and has a AFE cold air intake running on a stock tune.

How ever I do have the DPF deletes and EGR delete sitting in my garage just haven't gotten them on the truck yet. Do y'all think that could make a difference?

 

Let me google that for you... LMGTFY

P0401: EGR Low Flow
Several items to check/service.
May need PCM flashed/updated to resolve this issue (is recall thing)

The video below goes through several items to check/fix for this code.

This may or may not be the same issue as the white smoke and fuel smell thing.

 

something makes me think you did a tune already on the truck?


If not then you have an overfueling issue.


Put the stock air cleaner and box back on it. Put the tunes back to stock and clear the code and see what you get.