Hi guys , I'm trying to do a dpf delete on a friends lmm and now having some problems flashing it . I first pulled the stock tune and then tuned out the dpf and the truck ran perfect with no issues for about four months
And now its throwing dpf related codes and its in reduced power mode . I looked the tune over and found I had not turned off all DTCs so I turned everything I could find related to dpf to "non emissions, no MIL" but now when I reflash , it doesn't make any difference at all . It erases and programs and says script finished successfully but truck stays in low power mode . I deleted the dpf on another lmm a few days ago and is working fine but this truck is not taking any changes I make in the tune . Can anyone help me out on this ? The truck needs to go to work and its very useless like this.
My software and firmware are up to date as well