This is the worst review that I have seen so far on the Titan diesel. I hope that it is an isolated case: http://www.caranddriver.com/reviews/2016-nissan-titan-xd-long-term-test-review
The only way that cold have gone worse is if it had burned to the ground. It really sounds like the "techs" dont know how to work on it. They just clear codes time after time without much real trouble-shooting. It's a shame because this truck fills a niche.