TSB: SERVICE ACTION: ECM UPGRADE ? MIL ON WITH DTC P0638 AND ETC MOTOR CLEANING (SA153) - This bulletin provides information related to the ECM software upgrade for some 2011-2013MY Sorento 3.5L MPI vehicles, produced from October 25, 2009 through January 31, 2013, and 2011, 2012 & 2014MY Sedona 3.5L MPI vehicles, produced from March 03, 2010 through July 12, 2013, which may experience a Malfunction Indicator Lamp illuminated with the ECM (Electronic Control Module) system-related DTC P0638.
