Hey guys just got my 08 6.4 a few weeks ago :rock Truck has 78k on the clock. It has been perfect till this morning. I mean I'm not super worried just curious what's makin the engine light come on :help O FYI the truck is all stock for now lol. Ok so I was cruising down the highway and the engine light came on and won't go off :bang it is runnin fine by the way....No loss in power whats so ever. I'm thinking maybe the DPF is clogged or like a buddy of mine said the fuel filter mite need changed. Any input would be great guys....:bang. Thanks!!