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 ...

Daimler Truck North America is updating emissions software on about 330,000 Detroit-powered trucks, giving fleets more time to address diesel exhaust fluid system faults before severe derates take ...

The Environmental Protection Agency announced it is taking actions to ease the frustration and disruptions around sudden “derates” of diesel engines when they run out of diesel exhaust fluid or have a ...