I know there are several posts out there for this kind of stuff but i am posting because I have not found an answer that helps me yet. When I first installed my EFI live on my 08 6.7 cummins, I had zero issues. suddenly, randomly i will get an OH ding stating see dealership, maintenance required but no CEL. when i hook up my tuner it displays a DTC of $0280. Now it comes up every single time i turn my truck on and about 20 minutes into a drive. Dealerships dont have a clue since the code relates to a 7th cylinder...... any ideas? I have tried calling the rep who sold this to me and his advice was "this just happens with some of the tuners" and did not have a real answer so i have tried calling and so far am not happy....