CHICAGO -- Following a complaint by Navistar about a flawed certification process, the U.S. Environmental Protection Agency revised its guidelines for companies to comply with tougher emissions standards on diesel engines, Dow Jones is reporting.

RV Daily Report published a story Nov. 10 about a lawsuit filed by Navistar challenging the process EPA used to issue guidance for reducing diesel emissions through selective catalytic reduction. To read that story, click here.

The agency announced today that despite a new law that went into effect Jan. 1, it will remove suggested limits on the hours and miles trucks can operate without sufficient levels of the urea solution before the trucks begin to lose power and eventually become inoperable, Dow Jones reported.

Navistar complained that EPA's 1,000-mile limit would allow operators of diesel engines to disregard new regulations for 1,000 miles every time the urea solution in their trucks ran out, according to Dow Jones.

Source: CNN