i just purchased a 2016 6.7 a week ago truck is tuned an deleted i had a check engine light come on so i read the code right away and found its code p228f I've been reading that it could be leading to a failing cp4 fuel pump or contaminated fuel witch will lead to a failed cp4 pump but I've found that every one that has had this code show up is having other issues As well like low power stalling or hard starting I've not experienced any of these issues i have not driven the truck at all since this code came up for fear of that dreaded 9k bill to replace the fuel system the dealer the i purchased the truck from is also not being of any help and claiming that its my fault and my issue the code came up 5 days after buying the truck