This Preliminary Information communication provides information to the technician about vehicles that may have an engine will crank or turn over but will not start and/or once the engine is running the Service Engine Soon Malfunction Indicator Lamp will illuminate. Technician may find Diagnostic Trouble Codes U0100 and U1000 in multiple high speed modules and the Body Control Module may have B2190 or B2193 as well. Please assure the customer this concern will not cause a walk home. At this time engineering is aware of the concern and working towards a resolution.