I have a 2011 derating due to a DEF quality issue. Sets P20EE and P207F. It always works fine when it gets to me. I am wondering what options I may have to keep the truck from limiting speed due to these issues until the issue becomes something that can be duplicated and tested. Would prefer to leave vehicle as factory as possible. I am not familiar with the programs on diesels. I pull them and read out of interest, but have never modified.
Thank you
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