EPA Says We Don't Really Need 'Low DEF' Limp Mode In Trucks After All

EPA Says We Don't Really Need 'Low DEF' Limp Mode In Trucks After All

EPA Administrator Lee Zeldin also strongly urges manufacturers to update older trucks to eliminate this nagware.

How truck and engine OEs plan to approach EPA's new derate guidance

EPA's new guidance relaxing sudden 5-mph derates after aftertreament-system faults makes clear that existing derate procedures remain A-OK through at least the 2026 model year -- if manufacturers and their customers want them to be. Here's what a few truck and engine makers, and maintenance pros, are saying.

Farmers Applaud Common-Sense Approach to Diesel Engines

American Farm Bureau Federation President Zippy Duvall commented today on the Environmental Protection Agency’s announcement that it will revise Diesel Exhaus

EPA Orders Automakers To Stop Crippling Diesel Trucks For Low DEF Fluid Levels - AutoSpies Auto News

EPA Orders Automakers To Stop Crippling Diesel Trucks For Low DEF Fluid Levels

EPA Relaxes Diesel Exhaust Fluid Rules to Protect Farmers, Truckers from Sudden Power Loss

EPA Administrator Lee Zeldin (left) with Iowa Governor Kim Reynolds from the Iowa State Fair. Photo courtesy of the Office of Gov. Kim Reynolds. New rules have been rolled out by EPA to prevent sudden speed and power losses in diesel-powered trucks and farm equipment caused by Diesel Exhaust Fluid system failures—also known as DEF. “This was one of the top issues discussed by farmers and ranchers at a round table I attended and Guyton, Georgia i…