The EPA’s war on the dreaded diesel “limp mode” triggered by DEF systems just shifted into a much higher gear. While the initial focus centered on cleaning up the software for the 2027 model year and ...

Nebraska Attorney General Mike Hilgers supports the EPA announcement regarding DEF system failures. "Consumers have the right to repair their diesel equipment to ensure they function properly and ...

A southeast Kansas farmer says he’s relieved that the U.S. EPA is taking steps to address long-standing concerns about DEF system failures. “They’re just so unreliable.” Ben Bellar says an issue with ...

The U.S. Environmental Protection Agency (EPA) is escalating its response to consumer complaints regarding Diesel Exhaust Fluid (DEF) system failures, announcing a new investigation aimed at major ...

The Environmental Protection Agency continues its crusade to roll back truck emission regulations. The latest move is a doubling down in its efforts to reform diesel exhaust fluid (DEF) rules. For ...

Add Yahoo as a preferred source to see more of our stories on Google. EPA wants to eliminate truckers stranded by engine failures. (Photo: Jim Allen/FreightWaves) WASHINGTON — In a move to end “limp ...

The data collected will allow EPA to independently evaluate ongoing system failures. As of Feb. 2, engine manufacturers have 30 days to provide EPA with data on model years 2016, 2019 and 2023 ...

Breaking news, the EPA is forcing engine makers to reveal the truth behind their DEF systems for repairs, warranty claims to see if they have improved. They are also looking at if they even need to ...

The Environmental Protection Agency on Tuesday said it would put forth a rulemaking in the Federal Register seeking information to help it to permanently end diesel derates. The action follows an ...

EPA is requiring diesel engine manufacturers to submit DEF system warranty, failure, and repair data as part of a broader effort to assess ongoing performance and reliability issues affecting ...