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The changes reflect EPA guidance aimed at reducing downtime caused by emissions-system faults while maintaining compliance requirements.
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New guidance to engine manufacturers will reduce "derating," an automatic trigger forcing diesel engines to operate at a reduced capacity when the emissions system runs out of diesel exhaust fluid or there's a DEF-related fault.
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Diesel exhaust fluid doesn’t last forever. Before restarting an idle heavy-duty diesel truck or using DEF from storage, make sure it’s safe, compliant, and won’t damage your emissions system.
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The word-war over the two paths being taken to meet 2010 exhaust limits by North American truck and engine builders continued at the Mid-America Trucking Show.
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