So I have a completely stock engine 2006 F-350 CCLB with a readylift & on 35s & 130k miles. This past week my area reached lows of -60. I was out driving & working at the time like a good 21 year old....& of course something happened. No lie I pushed my truck that day with high reving cause I got stuck in snow drift. I got a check engine code for the exhaust back pressure reg. However I also have noticed white smoke prior to that, & to top it off im pushing some coolant through the tailpipe now. this is my first diesel, id appreciate help. im thinking im going to have to do a rebuild of sorts?