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EPA Orders End to Sudden DEF-Related Limp Modes in 2027 Heavy-Duty Trucks

The agency invoked Clean Air Act authority to demand manufacturer data within 30 days to assess DEF system failures.

EPA Clarifies Clean Air Act Supports Farmers’ Right to Repair Nonroad Diesel Equipment

EPA Orders Manufacturers to End Sudden Power Cuts for Low Diesel Fluid

EPA Moves to Rescind 2009 Greenhouse Gas Endangerment Finding