EPA Steps In to Keep Diesel Engines Running Smoothly

The U.S. Environmental Protection Agency is taking steps to protect farmers, truckers, and diesel equipment operators from sudden breakdowns tied to Diesel Exhaust Fluid, or DEF, systems. Earlier this month, EPA Administrator Lee Zeldin announced new guidance urging manufacturers to update software in existing vehicles and equipment. The change will give operators time to make needed repairs without risking safety or productivity.

Looking ahead, starting with model year 2027, all new diesel trucks will be required to avoid sudden and severe power loss when DEF runs out. But for the equipment already on the road, this new guidance—developed in partnership with manufacturers—means updates can be made now to keep engines running smoothly.

The National Cotton Council and the National Cotton Ginners Association say they welcome the move. Chairman Patrick Johnson called it a “common-sense fix” that will reduce unexpected breakdowns and support small businesses and farmers. He added the action not only boosts productivity in the field but also strengthens the economic viability of U.S. agriculture.