PACCAR Incorporated (PACCAR) is recalling certain 2011-2014 model year Kenworth T440 vehicles manufactured March 10, 2010, through September 23, 2013 and equipped with Allison transmissions, Cummins Westport ISL-G engines, and NAMUX2 software. In the affected vehicles, the engine harness may have been installed incorrectly rendering the neutral start interlock inoperable.
