Cold Weather Diesel Reliability Act of 2026

(a) Cold weather sensor mitigation measures. Not later than 180 days after the date of enactment of this Act, the Administrator shall revise any applicable regulation under the Clean Air Act (42 U.S.C. 7401 et seq.) that applies to covered vehicles or engines used in covered vehicles to authorize covered manufacturers of those covered vehicles or engines to suspend inducement-related engine derate or shutdown functions that are triggered by the emissions control system when ambient temperatures are at or below 20 degrees Fahrenheit and to specify that no party other than a covered manufacturer shall suspend those inducement-related derate or shutdown functions, subject to the condition that the engine shall return to normal operation once ambient temperatures rise above 20 degrees Fahrenheit.

(b) Relief to farmers and Arctic regions. Notwithstanding any other provision of law, not later than 180 days after the date of enactment of this Act, the Administrator shall revise any applicable regulation under the Clean Air Act (42 U.S.C. 7401 et seq.) to authorize covered manufacturers to permanently suspend inducement-related engine derate or shutdown functions that are triggered by the emissions control system on—

(1) agricultural equipment; or

(2) a covered vehicle that is primarily operated north of 59 degrees north latitude, as demonstrated by documentation of commercial operation and maintenance and dispatch records.