Westlake Village, California – Problems with heavy-duty truck engines are nearly twice as high following two rounds of revisions in emissions standards, according to a new report by J.D. Power and Associates. The study found that 51 per cent of owners of one-year-old, heavy-duty truck engines in 2010 reporting experiencing some type of problem, compared to only 26 per cent who complained of problems with engines built prior to emission standards changes in 2004 and 2007.

“Clearly, the emissions requirements have put a burden on engine manufacturers, and the result is that today’s engines, although environmentally improved, are more problematic,” said Todd Markusic, senior director of commercial vehicle practice at J.D. Power and Associates. “Given the quality issues that arose from the last emission standards redesign in 2007, the new emissions standards in 2010 will no doubt create another challenge for engine manufacturers, but those that best handle the integration of these new standards will have a competitive advantage.”

The study also found that the number of engine problems, on average, increased by 55 per cent after 50,000 miles (80,467 km) of use, rising to 80.5 problems per 100 vehicles (PP100) from 51.9 PP100.

The most commonly-reported engine problems were issues with electronic control module calibration, cited by 14 per cent of owners, and exhaust gas recirculation (EGR) valve at 13 per cent.

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