Diesel trucks and equipment could keep full power in freezing weather when shutdown rules would create safety or service risks. Some vehicles in very cold areas could also get a year-round break from diesel exhaust fluid system rules.
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Cold Weather Diesel Reliability Act of 2025 is a House bill in committee. The latest recorded action: Referred to the House Committee on Energy and Commerce.
Latest action on H.R. 6250: Referred to the House Committee on Energy and Commerce.
Who this affects: This bill mainly affects people and businesses that depend on diesel engines in very cold or remote places. That includes truckers, emergency services, rural communities, and operators of construction, mining, or industrial equipment. Manufacturers would also have to design or manage systems that can use the new cold-weather exceptions.
Why this matters: Diesel engines can become a safety problem if they lose power or shut down in extreme cold, especially far from help. This bill would let some engines keep running when emissions-system rules would otherwise cut power. It could help keep freight, emergency response, and public services moving in cold areas. The bill does not spell out the full air-quality effects, so those would depend on how the EPA writes and enforces the new rules.
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