Allows manufacturers to suspend diesel engine shutdown functions in cold weather.
The Cold Weather Diesel Reliability Act of 2025 requires the Environmental Protection Agency to revise regulations to allow manufacturers to suspend engine derate or shutdown functions in prolonged cold weather conditions. This applies to vehicles in regions with prolonged freezing conditions or where diesel exhaust fluid systems are impractical. The bill ensures that emissions safeguards do not jeopardize human safety or impede critical mobility.
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