Chevy Duramax DEF issues
I have been following a thread recently on duramaxforum.com which is following people that have had DEF problems with their 2011 and newer chevy duramax trucks. I happen to be one of them. My truck ...
Forum Discussion
catfishmontana wrote:
I thought the Ford issue was mainly a batch of bad NOX sensors....no?
Back when all the DEF/NOX sensor problems were going on, I still had the 2011 Ford and the "Big Ford Drum". I remember well how mad many Ford owners were about how their trucks were running, or not running, throwing all sorts of CEL's relating to emissions and Ford's slow response to the issues. At that time, I was preaching patience, to both the Ford and GM camps. GM had issued their Service Bulletin that covered the temporary disabling of the DEF system. Ford was sending out multiple updated programming patches as they tried to get a handle on the crux of the problem.
Both GM's and Ford's problems began at the onset of the first cold weather in early Winter. GM had more problems than Ford but Ford had a bunch of trouble up in Canada. (There is still a Ford guy up in Western Canada that still is mad at me for defending Ford during this period). I said this then and I will say it again, these DEF/NOX sensor related issues were a very small problem for both manufacturers. But because these trucks were relatively new, the manufacturers received heavy grief from the owners...and heavy suspicion from prospective buyers.
These problems are now relegated to the "normal failure rate" category. The pumps, tanks and programming have been well vetted by now. Are there going to be unfortunate customers that have some emissions related problems...of course...but the EPA requirements for warranty coverage virtually ensure that any failures will be warrantied...even by the Warranty Grinches at Ford...too bad the same grinches won't fix the HPFP's...
Regards
