Quote:
Originally Posted by Scubawise
What is a DEF?
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Diesel Exhaust Fluid. It is part of the emissions on Diesel vehicles since 2011. It is basically a scrubber system that keeps particulates out of the exhaust. So anything past 2011 that smokes is deliberately tuned to do so, has the emissions deleted or is not running properly. If you have a Gas vehicle this is all irrelevant.
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