i have a 2008 f250 6.4L and i took the muffler off and just put a stright pipe from the dpf back about a week ago and now i have a check eng light on that says this Particulate Trap Efficiency Below Threshold (Bank 1) if anyone knows what happend plz inform thanks.

 

welcome to diesel bombers you need to read this it has to do with the cummins but in research they both pretty much are the same https://www.dieselbombers.com/6-7-li...-your-dpf.html