EPA demands DEF failure information from manufacturers
The Environmental Protection Agency is demanding information from engine manufacturers on diesel exhaust fluid (DEF) system failures.
Data collected from the top 14 on-road and non-road manufacturers will enable the EPA to independently evaluate ongoing system failures and inform emissions regulations.
“The agency is committed to working with manufacturers to ensure practical, durable solutions that simultaneously support emissions reductions and reliable operations,” said EPA Administrator Zeldin.
The EPA is requiring data on warranty claims, failure rates, and repair information for model-year 2016, 2019, and 2023 emission-control products. The agency previously issued guidance to manufacturers calling for revisions to DEF software to prevent sudden shutdowns and provide more time to repair faults.
Separately, EPA issued guidance to manufacturers stating that under the Clean Air Act, consumers have the right to repair their farm and other non-road diesel equipment.
“By protecting every American’s right to repair, we’re not just fixing devices, we’re securing a stronger, more independent future for our country,” said Zeldin.
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