Just curious to know Sieko, if you are a saleperson for Edge monitors or Shell. Promoting a monitor in each of your postings to the average person is a complete waste of money. Just another gadget to waste money on.I suspect the main cause of Engine light, is due to DEF, carbon built up and cheap diesel. Another cause, when you shut off the truck during REGEN and it is still very hot, it can damage the sensors or warp some parts. You really need a monitor, as I can't tell when a REGEN occurs without the monitor.
FCA could have it displayed on the EVIC, but all they want you to do, is get into the habit of idling for a few minutes before shutting off every time, yes every time. Bad fuel economy and very stupid. At least have the firmware handle it, it won't shut off until normal temperatures.
Give shell v-power diesel a try, at least three tankfuls.
With the Edge CS2, that I use. I can look up the code, get the error message and if it minor, I clear it. This only happen once, I took a trip to Ainsworth Hot spring from Calgary, the day before I had the truck wash, and when I left in the morning, it was -27c, not sure what the wind factor. I did get an error, minor, after driving for awhile I reset it and never came back. (a little icing). Having the winter covers help a lot too. It did a good dry out of the vehicle.
Save a trip to a dealer, where they would do the same thing and give you the impression, they did some update or other garbage. I will report it/log it with the dealer on my next oil change.
hope this helps someone...