08 Dodge Ram 6.7
 

I have an 08 Ram Mega cab with the 6.7. The truck has 65,000 miles and just the over day I got a warning from the Over head display of "Service Required, see dealer Immediately". After some research I changed the CCV filter and tried to reset with the pumping the accelerator 3 times with no luck. The owner before me removed the DPF so I know its not anything with that.


Suggestions?
Thanks