EPA shifts DEF policy, promising billions in relief for farmers and truckers
TL;DR Summary
The EPA, led by Administrator Lee Zeldin, announced new guidance to remove Diesel Exhaust Fluid (DEF) sensors on diesel equipment and allow NOx-sensor-based software updates to monitor emissions. EPA says this will curb DEF-system failures that cause sudden speed reductions and outages, delivering about $13.79 billion in annual savings for Americans (including $4.4 billion for farmers) while keeping emissions standards intact. The move builds on February 2026 Right to Repair guidance and August 2025 actions, with ongoing data review from manufacturers and plans for further deregulatory steps for future vehicles.
- Trump Administration Announces Latest Action to Address Diesel Exhaust Fluid (DEF) System Complaints, Saves American Farmers and Truckers Over $13 Billion Annually U.S. Environmental Protection Agency (.gov)
- EPA removes DEF sensor requirement in move to save truckers and farmers 'countless hours of lost time' CDLLife
- Trump Signals More DEF Rollbacks, Pushes Manufacturers to Lower Equipment Costs Pro Farmer
- The EPA is listening to agriculture community Santa Fe New Mexican
- National Ag Day: EPA Works to Restore Regulatory Balance Between Agricultural and Environmental Priorities RFD-TV
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Read on U.S. Environmental Protection Agency (.gov)