EPA officials say additional action regarding DEF is planned. The agency will be issuing a new deregulatory proposal ...

Selective catalyst reduction (SCR) systems were introduced in 2010 in the United States to meet the NOx requirements. With an ...

Diesel engines across agriculture, trucking and construction have been sidelined by a tiny part that was supposed to keep the ...

Environmental Protection Agency Administrator Lee Zeldin has announced that EPA has removed the requirement that diesel equipment contain Diesel Exhaust Fluid (DEF) sensor equipment. EPA announced the ...

At the Great American Agriculture Celebration on the White House South Lawn Friday, President Trump announced that the ...

Wyoming's most famous diesel mechanic, his techy son, and a third well-known mechanic who suffered federal prosecution all ...

This DEF sensor can shut down diesel engines even due to faulty readings, prompting the EPA to remove it as a requirement.

The U.S. Small Business Administration estimates new guidance on diesel exhaust fluid sensors will save farmers and truckers ...

President Donald Trump and the U.S. Environmental Protection Agency announced guidance allowing the removal of the DEF sensor ...

In a major move aimed at “freeing up” the American supply chain, President Trump and EPA Administrator Lee Zeldin announced ...

The feds aren't scrapping DEF altogether, but this could potentially address a large portion of emissions system failures.

EPA’s latest move on diesel exhaust fluid systems aims to reduce unexpected derates and costly downtime, both persistent ...