The EPA is escalating its response to consumer complaints regarding DEF system failures, announcing a new investigation aimed ...

HOLLY, Mich., April 16, 2025 (GLOBE NEWSWIRE) -- A diesel truck, car or SUV that is losing power and fuel economy, shutting down unexpectedly, and/or has a DEF warning light illuminated is probably ...

EPA asked manufacturers for info in hopes to "PERMANENTLY eliminate the deratements ENTIRELY," agency boss Lee Zeldin said.

Following Monday’s right-to-repair announcement, EPA is demanding DEF failure data from engine makers, targeting shutdowns ...

If you’ve had your diesel RV or tow vehicle suddenly lose power because of a DEF (diesel exhaust fluid) issue, you’re not alone. And now, the EPA is stepping in with changes that address this problem.

About two decades after the launch of the 6.6-liter Duramax V8, GM's 3.0-liter Duramax inline-six turbodiesel arrived in 2019 with a promise to deliver "outstanding fuel economy, great horsepower, and ...

The Environmental Protection Agency announced it is taking actions to ease the frustration and disruptions around sudden “derates” of diesel engines when they run out of diesel exhaust fluid or have a ...