[Stay on top of transportation news: Get TTNews in your inbox.] Ongoing shortages of replacement parts for failed diesel exhaust fluid quality sensors are believed to be causing thousands of trucks ...

In front of a gathering of farmers, ranchers and growers at the White House, President Trump and EPA announced new guidance that will remove the DEF sensor requirements, which the Small Business ...

Diesel engines across agriculture, trucking and construction have been sidelined by a tiny part that was supposed to keep the air cleaner. After years of complaints about failure-prone diesel exhaust ...

President Donald Trump and the U.S. Environmental Protection Agency announced guidance allowing the removal of the DEF sensor requirement for all diesel equipment. EPA said sudden speed losses caused ...

The Environmental Protection Agency announced on March 27, 2026, that it is removing the diesel exhaust fluid sensor requirement for all diesel equipment, a decision the agency frames as a direct ...

The U.S. Environmental Protection Agency (EPA) last week issued guidance that drops the requirement for Diesel Exhaust Fluid (DEF) sensors as part of a truck's aftertreatment system and allows truck ...

Diesel owners who have wrestled with warning lights, sudden power loss or even complete shutdowns tied to diesel exhaust fluid systems may finally be getting some relief. The U.S. Environmental ...

Evan Williams is an automotive journalist and mechanical engineering technologist with more than a decade of experience in the industry. He has written for the Toronto Star and AutoTrader Canada and ...