Iowa House lawmakers heard public comments on and voted to advance bills Tuesday that would create regulations for shellfish farms, prohibit lawsuits related to greenhouse gas emissions from ...

The EPA is escalating its response to consumer complaints regarding DEF system failures, announcing a new investigation aimed ...

Breaking news, the EPA is forcing engine makers to reveal the truth behind their DEF systems for repairs, warranty claims to ...

The EPA questions if diesel DEF de-rates are essential for emissions compliance. Could changes be on the horizon? Discover ...

The Environmental Protection Agency is requiring 14 major diesel engine manufacturers to provide detailed information about ...

Diesel-powered submarines present a challenge that may seem paradoxical at first. Their engines require ...

The federal agency is demanding failure and repair data from manufacturers to "hold [them] accountable for the continued system failures." ...

The U.S. Environmental Protection Agency is ramping up its pressure on engine makers to fix persistent persistent diesel ...

EPA asked manufacturers for info in hopes to "PERMANENTLY eliminate the deratements ENTIRELY," agency boss Lee Zeldin said.

Removing an emissions device, while no longer a criminal matter, still represents risk for haulers. One responded to EPA and DOJ's recent moves on DEF faults and diesel derates, even questioning ...

We have all seen it happen. One minute your post 2011 diesel is pulling horses or hauling a gooseneck full of cattle to the feedlot. The next, a DEF warning light flashes and your dependable pickup ...