EPA Could Eliminate Limp Mode for Diesel Trucks Low on DEF

EPA Could Eliminate Limp Mode for Diesel Trucks Low on DEF

The federal agency is demanding failure and repair data from manufacturers to "hold [them] accountable for the continued system failures."

EPA Gives Engine Makers 30 Days to Provide DEF System Data

EPA Administrator Lee Zeldin is asking major diesel engine OEMs to provide critical data about diesel exhaust fluid system failures to remedy equipment problems for truckers and farmers.

EPA takes additional measures to address DEF issues for farmers and truckers

WASHINGTON — U.S. Environmental Protection Agency (EPA) Administrator Lee Zeldin is taking another step to address widespread concerns from farmers, truckers, motor coach operators and other diesel equipment operators regarding Diesel Exhaust Fluid (DEF) system failures. “As I traveled to all 50 states during my first year as EPA Administrator, I heard from truck drivers, farmers and many others rightly complaining about DEF and pleading for a f…

EPA targets truck engine makers on DEF system failures

The Trump administration is demanding warranty and failure data from top manufacturers in an effort to end truck engine shutdowns.

EPA promises truckers more relief for Diesel Exhaust Fluid system-related sudden speed losses and shutdowns

The U.S. Environmental Protection Agency (EPA) promised to take more action on behalf of truckers and farmers regarding Diesel Exhaust Fluid (DEF) system failures. EPA Demands DEF Data From Diesel Engine Makers On February 3, 2026, EPA Administrator Lee Zeldin announced that the agency is “demanding information from major diesel engine manufacturers on critical data from DEF system failures” as part of upcoming rulemaking to provide more relief …

EPA Announces New Measures to Eliminate Low DEF Limp Mode for Diesel Trucks, Advance DEF Right-to-Repair

Under updated EPA guidance this week, diesel trucks may no longer experience any derating as a result of running out of DEF. Here's the latest info. The post EPA Announces New Measures to Eliminate Low DEF Limp Mode for Diesel Trucks, Advance DEF Right-to-Repair appeared first on The Fast Lane Truck.