Members of the ag community support the Environmental Protection Agency’s (EPA) recent ruling on DEF guidelines for heavy trucks and off-road equipment.
The agency issued guidance on Aug. 12 to manufacturers about how they can modify DEF systems on new and existing vehicles and equipment “to reduce derates that can limit a vehicle’s performance to nearly inoperable levels.”
EPA Administrator Lee Zeldin made the announcement at the Iowa State Fair.
In current DEF systems, if the system runs out of fluid or part of it fails, it can trigger the vehicle to reduce speed to as slow as five miles per hour.
Beginning with model year 2027 diesel engines, the EPA states all new vehicles must be wired to avoid this kind of sudden power loss. Manufacturers will also have to update software on existing vehicles.