Why doesn't diesel exhaust fluid (DEF) work in extreme cold?

Diesel exhaust fluid is essential for keeping your engine functioning without letting off too many emissions. But it doesn't ...
Trucking Info

EPA Targets DEF Sensor Failures Behind Truck Derates

New guidance allows engine makers to replace problematic DEF sensors with NOx-based systems, aiming to reduce unnecessary ...
Transport Topics

Nebraska Says Self-Repair Permitted on DEF Systems

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 ...
Land Line

EPA takes aim at DEF sensors that sideline truckers

Sick of DEF failures shutting you down? EPA is pushing changes that could reduce disruptions caused by faulty sensors.
Truckinginfo

EPA Acts to Curb Sudden DEF-Related Diesel Engine Derates

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 ...
DRGNews

Action to Address Diesel Exhaust Fluid (DEF) System Complaints

For more information, please see EPA’s Diesel Exhaust Fluid. Since 2010, most on-road diesel trucks and many types of nonroad ...