Illinois Fertilizer & Chemical Association
Supply · Service · Stewardship

EPA Removes DEF Sensor Requirement, Easing Equipment Downtime

EPA issued new guidance eliminating the requirement for diesel exhaust fluid (DEF) sensors on equipment, addressing widespread failures that have caused unnecessary shutdowns. The agency noted this change could save farmers and truckers “countless hours of lost time and productivity” while still maintaining emissions compliance. This is a significant development for ag retailers managing fleets and application equipment during spring operations.