TSB: ECM UPGRADE - KNOCK IMPROVEMENT DTC P0328 - THIS BULLETIN PROVIDES INFORMATION RELATED TO THE ECM SOFTWARE UPGRADE FOR SOME 2010-2011MY SOUL (AM) 1.6L VEHICLES WHICH MAY EXPERIENCE A MALFUNCTION INDICATOR LAMP (MIL) ILLUMINATED WITH THE ELECTRONIC CONTROL MODULE (ECM) SYSTEM-RELATED DTC P0328.
