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- Jul 20, 2020
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That's actually complete horse puckey.... Most all DEF comes from the same bottlers and the same hole in the ground. Wal mart DEF is fresher and identical content as "peak" and they turn it over by the skid loads weekly.Hi @StephenPT I only buy brand name Peak Blue DEF. I heard of others buying cheap WalMart stuff and having issues so I spend the extra $$ to avoid any quality problems. The cam shaft sensor did not sound like something easily replaced. The more they wrench on and take apart the NEW vehicle, the less we want that one back.
I've seen Peak and other brands sitting on dusty shelves that was over a year old still in the store. If DEF is your issue, it could very well be contaminated, old, or stuff that has turned cloudy. A refractometer would verify this in an instant. A competent tech could rule this in or out in 15 minutes....