Congressman Nick Begich Introduces the Cold Weather Diesel Reliability Act to Keep America’s Coldest Regions Moving
WASHINGTON, D.C. – Nov. 25, 2025 — Congressman Nick Begich (R-AK) introduced the House companion to the Cold Weather Diesel Reliability Act, legislation that ensures trucks and heavy equipment operating in the nation’s coldest climates can continue running safely in extreme weather. The Cold Weather Diesel Reliability Act updates federal policy to reflect how diesel engines can operate in freezing climates and ensures that safety guides emissions compliance for the states that rely on diesel the most.
“Alaska runs on diesel - from commercial trucking to remote community supply lines to critical infrastructure and national defense operations,” said Congressman Begich. “When the federal government imposes rules that literally freeze up engines and shut down equipment in subzero temperatures, it’s dangerous for our communities. This bill delivers a common-sense fix that keeps drivers safe, keeps freight moving, and brings Washington regulations back in line with the real-world conditions Americans face across the great North.”
BACKGROUND:
In subzero temperatures common across Alaska and much of the northern United States, EPA-mandated emissions systems can shut down diesel engines when diesel exhaust fluid (DEF) fails to reach proper operating temperatures. These automatic shutdowns can stop vehicles even when engines are functioning normally, putting drivers and maintenance crews at risk.
The Cold Weather Diesel Reliability Act directs the EPA to update outdated, one-size-fits-all regulations and provide year-round exemptions from DEF system requirements for vehicles and equipment that operate primarily in cold-weather climates and ensures engines remain operational during extreme cold.
Senators Dan Sullivan (R-Alaska) and Cynthia Lummis (R-Wyo.) introduced the Senate version earlier this month.
The legislation has broad backing across Alaska’s transportation, agriculture, freight, and heavy-equipment sectors.
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