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Common Diesel DEF Problems and How to Solve Them

HOLLY, Mich., April 16, 2025 (GLOBE NEWSWIRE) -- A diesel truck, car or SUV that is losing power and fuel economy, shutting down unexpectedly, and/or has a DEF warning light illuminated is probably ...
GM Authority

EPA To Investigate Diesel Engine DEF System Failures

The U.S. Environmental Protection Agency (EPA) is escalating its response to consumer complaints regarding Diesel Exhaust Fluid (DEF) system failures, announcing a new investigation aimed at major ...
Overdrive

EPA looks to permanently end diesel derates due to DEF, aftertreatment problems

The Environmental Protection Agency on Tuesday said it would put forth a rulemaking in the Federal Register seeking information to help it to permanently end diesel derates. The action follows an ...
GM Authority

EPA DEF Investigation: Automakers May Need To ‘Fix’ Diesel Engines Already On U.S. Roads

The EPA’s war on the dreaded diesel “limp mode” triggered by DEF systems just shifted into a much higher gear. While the initial focus centered on cleaning up the software for the 2027 model year and ...