Cummins will voluntarily recall 500,000 model-year 2010-2015 medium and heavy duty trucks due to a faulty emissions component in its engines. The U.S. Environmental Protection Agency (EPA) is calling it the largest voluntary recall in an emission-related case.
In affected engines, a part within the selective catalytic reduction (SCR) systems designed to control nitrogen oxide (NOx) emissions, an air pollutant that contributes to smog, degrades within a few years and stops working. In short, the engines do not control emissions for the vehicle's entire lifespan, only the first few years of service.
High NOx emissions from certain trucks equipped with Cummins engines were initially found in testing by the California Air Resources Board (CARB). Cummins conducted follow-up testing which confirmed the cause, deteriorating components within the SCR system.
Cummins then agreed to issue the voluntary recall, which will be conducted in two phases.
The recalls include certain model-year 2010-2013 ISX12 and ISX15 engines and 2010-2014 model-year ISL9, ISC8.3 and ISB6.7 engines.
The company will contact owners with instructions on repair. Owners should contact Cummins for further details about the affected products and recall schedule.
