?SI B12 16 12 Engine Electrical Systems April 2013 Technical Service This Service Information bulletin supersedes SI B12 16 12 dated September 2012. PERFORM THE PROCEDURE OUTLINED IN THIS SERVICE INFORMATION ON ALL AFFECTED VEHICLES BEFORE CUSTOMER DELIVERY OR THE NEXT TIME THEY ARE IN THE SHOP FOR MAINTENANCE OR REPAIRS. designates changes to this revision SUBJECT Service Action: Program Control Units (OBD Communication). The vehicles affected by this Service Action require a vehicle software update in order to address non-compliance pertaining to an incomplete parameter in the OBD (onboard diagnostics) test process.
