A faulty high-pressure fuel pump is suspected and could affect as many as 600,000 heavy-duty Ram trucks with the Cummins turbo-diesel engine.

The National Highway Traffic Safety Administration (NHTSA) announced today that it’s opening an investigation into the high-pressure fuel pump failure on some heavy-duty Ram trucks. The problem, described in 22 consumer complaints so far, is that the trucks could stall and become immobile while traveling at speeds over 25 mph. NHTSA’s report says this could cause “permanent disablement of the vehicle.”
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