EPA shifts DEF policy, promising billions in relief for farmers and truckers
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.
