I purchased 5 gal of Peak Blue DEF from Amazon prime..... It's in my shed and I haven't used any yet. But I'm comfortable enough to proceed and am thinking there is something unique about your situation. How did you fix the problem?
I have tried using peak Blue DEF (purchased at autozone)in my Grand Cherokee and the check engine light comes on saying I am using the wrong DEF. I noticed others on the forum buying the same DEF and was trying to determine if there are others with the same issue. Please let me know what brand you are using and if you have any issues