US tracker

S. 3135

Cold Weather Diesel Reliability Act of 2025

Environment and Public Works Committee · Sen. Dan Sullivan (R-AK)

16 September 2026 | Reported by committee (Environment and Public Works, with an amendment in the nature of a substitute, without written report)

What's next: Floor scheduling (leadership decides if and when it gets a vote)

Summary: The bill would require the EPA to allow manufacturers of certain vehicles to temporarily disable engine shutdown or power-reduction features during extended cold weather periods. This aims to improve diesel vehicle reliability and performance in harsh winter conditions while those protective functions are suspended.

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Posted 17 September 2026

As published — the exact text this tracker posted, kept verbatim for the record

S. 3135 | Cold Weather Diesel Reliability Act of 2025 | Sen. Dan Sullivan (R-AK) | Environment and Public Works Committee 📅 16 September 2026 | 📋 Reported by committee (Environment and Public Works, with an amendment in the nature of a substitute, without written report) What's next: Floor scheduling (leadership decides if and when it gets a vote) Summary: The bill would require the EPA to allow manufacturers of certain vehicles to temporarily disable engine shutdown or power-reduction features during extended cold weather periods. This aims to improve diesel vehicle reliability and performance in harsh winter conditions while those protective functions are suspended. [AI-Generated]

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