I don't have extreme cold weather here in TN, but I've had single digit nights and never had a problem.. but, I would just put it on a timer to run about 2 hours before you leave and call it day.
I'm to OCD to think about having any gas in there, these things are just to picky.. My father pumped a full tank of gas in his Duramax a few years ago.. that was fun. He asked why it was knocking after 1/2 mile from the station. :rolleyes:
Honestly, I would start with draining the tank, then changing the filters. Fill up with #2 diesel and then some additive for a little extra protection.
Welcome! We're glad to have you.. start by reading around the forum as we have plenty of info to go around. Fuel filters is something I always pay extra attention to on a diesel.
BFG AT KO2, or Nitto Ridge Grappler will be my next tire.
Both are great mild hybrid AT/MT tires, and probably will last about as long as any out there.
But, just my opinion. The Ridge Grappler's are getting great reviews, and of course the BFG has been out awhile and most seem to still love those.
Welcome to the club @sorabol
Contact FCA Customer Care and let them know you're not happy. Hopefully though the dealer continues to take care of it, but again, it seems dealers are just throwing parts at this error code.