The U.S. Environmental Protection Agency is urging truck and engine makers to adjust diesel exhaust fluid (DEF) software to prevent severe power restrictions caused by DEF system faults. Current ...

The Environmental Protection Agency on Tuesday announced a "fix" to "protect American farmers, truckers, and other diesel equipment operators from sudden speed and power losses caused by diesel ...

EPA approved guidance allowing diesel manufacturers to replace urea quality sensors with NOx sensors in DEF systems. The agency said faulty DEF sensors are a significant source of warranty claims and ...

Diesel Exhaust Fluid is a critical component in a diesel truck's fuel system. Here's what it does and how much you can expect a truck to use.

U.S. Environmental Protection Agency (EPA) Administrator Lee Zeldin on Tuesday urged engine and equipment manufacturers to revise system software to prevent sudden loss of power from engine derates ...

The Environmental Protection Agency announced it is taking actions to ease the frustration and disruptions around sudden “derates” of diesel engines when they run out of diesel exhaust fluid or have a ...

Diesel owners who have wrestled with warning lights, sudden power loss or even complete shutdowns tied to diesel exhaust fluid systems may finally be getting some relief. The U.S. Environmental ...

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 ...

The data collected will allow EPA to independently evaluate ongoing system failures. As of Feb. 2, engine manufacturers have 30 days to provide EPA with data on model years 2016, 2019 and 2023 ...

Most diesel truck owners understand how to put diesel exhaust fluid (DEF) in their trucks. However, some make the mistake of getting DEF in their fuel tank instead of the dedicated DEF tank. As the ...