Cummins Inc is recalling about 500,000 medium- and heavy-duty trucks to correct a faulty emissions control system in the engines it manufactured for the trucks, the U.S. Environmental Protection Agency said.
The EPA said the Cummins recall of vehicles that were produced between 2010 and 2015 was the largest ever voluntary recall of trucks due to emissions problems. The catalytic reduction systems were found to be less durable than required and will be replaced, it said.
The recall is to replace a faulty emissions control systems component that causes excess nitrogen oxides emissions. The problem is the result of a defective part and was discovered during emissions standards compliance tests by the California Air Resources Board.
The Cummins spokesman said the recall will be rolled out in two phases, starting with heavy-duty trucks in August and medium-duty trucks next March.
