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What Is DEF and How Does It Work?

DEF is a key component in lowering pollutants emitted from diesel engines, helping to reduce harmful emissions. Long-haul truckers and diesel engine enthusiasts had to rethink their entire operations ...
abc27

Common Diesel DEF Problems and How to Solve Them

HOLLY, Mich., April 16, 2025 (GLOBE NEWSWIRE) -- A diesel truck, car or SUV that is losing power and fuel economy, shutting down unexpectedly, and/or has a DEF warning light illuminated is probably ...
GM Authority

EPA To Investigate Diesel Engine DEF System Failures

The U.S. Environmental Protection Agency (EPA) is escalating its response to consumer complaints regarding Diesel Exhaust Fluid (DEF) system failures, announcing a new investigation aimed at major ...
Overdrive

Used-truck pricing, long-term value: Emissions-system PM could play an increasing role

The first two parts of this year's series examining the Environmental Protection Agency's diesel emissions regulations' impact on pricing and reliability for equipment over two decades focused largely ...
Transport Topics

Nebraska Says Self-Repair Permitted on DEF Systems

Nebraska Attorney General Mike Hilgers supports the EPA announcement regarding DEF system failures. "Consumers have the right to repair their diesel equipment to ensure they function properly and ...
AgWeb

EPA Backs Farmers, Affirms Right to Repair Equipment

The Environmental Protection Agency issues new right-to-repair guidance clarifying how the Clean Air Act applies to non-road diesel equipment, a move EPA Administrator Lee Zeldin says is intended to ...