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.

U.S. Environmental Protection Agency Administrator Lee Zeldin was at the Iowa State Fair Aug. 12, 2025 with U.S. Small Business Administrator Kelly Loeffler, right, and Gov. Kim Reynolds second from ...

[Stay on top of transportation news: Get TTNews in your inbox.] The Environmental Protection Agency is directing truck manufacturers to revise software in new and existing trucks to prevent engine ...

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 ...

The Environmental Protection Agency (EPA) has issued new guidance regarding diesel exhaust fluid (DEF) systems in diesel engines that cause trucks and tractors to enter “limp mode” when DEF levels are ...

The U.S. Environmental Protection Agency is working to fix a long-standing headache for diesel truck and equipment operators: power cuts triggered by low diesel exhaust fluid levels. New rules will ...

One of the many things we love about running a diesel engine is how long it will run. You can pack in a lot of mileage without needing major repair - as long as you take care of the motor and keep ...

Most diesel truck owners understand how to put diesel exhaust fluid (DEF) in their trucks. However, some make the mistake of getting DEF in their fuel tank instead of the dedicated DEF tank. As the ...