Diesel, once a bastion of the future and a savior of fuel economy, has found itself in a very different place since the industry-shaking Diesel Gate incident of 2015. It went from what was seen as the norm in Europe and the future in the U.S., to a dirty fuel only used in commercial vehicles and heavy-duty pickups. Another reason for the crack-down on diesel came in the form of a litany of emissions systems. One of the systems that was introduced is Diesel Exhaust Fluid, a system that is still controversial to this day. In this article we will look at how this system works, what it does, how it breaks and, lastly, what to do if/when it fails.
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