Cummins and PACCAR are updating diesel engine software to give operators more time to address certain DEF-related issues ...
The Environmental Protection Agency on Thursday unveiled a proposal that, while leaving in place the actual emissions limits mandated in a 2023 final rule for model year 2027 engines, could put a ...
The Environmental Protection Agency (EPA) on Thursday published a proposal to revise regulations for commercial truck nitrogen oxides (NOx) emissions for the 2027 model year, dropping a requirement ...
EPA's relaxed NOx rule, as many expected, removes the warranty extension—and proposes annihilating the troublesome DEF derate ...
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EPA rolls back DEF rules after months of diesel delete buzz: Here’s what actually changed
For months, diesel truck owners have wondered whether the Trump administration would dramatically roll back EPA emissions ...
Updated diesel engine software gives truck operators more time to address emissions-system issues while staying compliant ...
Cummins and Paccar are rolling out software updates tied to revised EPA guidance on DEF inducement. The changes aim to ...
These two major engine manufacturers are aligning with relaxed EPA guidance related to sudden derates due to DEF/emissions ...
Cummins and PACCAR announce software updates extending repair windows and boosting final derate speeds up to 25 mph.
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