Welcome to the wonderful world of Chrysler. I also have an 07 3500 Mega Cab with the 6.7. My check engine light came on once and I called the dealer and they said no swear just continue your trip and bring it in to be flashed so I did, after about 2,500 miles.
They flashed it and all seemed well. Then I got a recall notice for the 02 sensor so took it in and had it changed. Next trip low and behold the check engine light came on and I just ignored it and it went out sometime later. At this point if it comes on I just ignore it. I don't think Chrysler has a clue yet.
Other than that I love my truck.
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