I received a check engine light today. Once I arrived at the CG I checked SilverLeaf and got the following: ENG SPN 06848 16 Unknown Component High Reading 05/29/11 10:54 ENG SPN 24287 31 Unknown Component High Reading 05/29/11 10:10 I called FreightLiner (they provide an emergency 24 /7 service) and his book did not have any code number that was even similar. The engine CPU did not retain the fault code that caused the check eng light. Does anyone understand what these two code numbers mean? Did they actually come from the engine? Are they unique to Silverleaf's software? Thanks, Steve