BMW VEHICLE: M54/M56-MIXTURE TOO LEAN-FAULT CODES 2882/2883 ARE STORED IN THE DME. COMPLAINTS THAT SERVICE ENGINE SOON LIGHT IS ILLUMINATED. THE FAULT CODES 2882/2883-FUEL TRIM, MIXTURE TOO LEAN ARE STORED IN THE DME. POSSIBLE CAUSES MAY INCLUDE-INCORRECT AIR FILTER, UNMETERED AIR OR A DEFECTIVE AIR MASS METER. *PE