ENHANCED INSPECTION / MAINTENANCE (I/M) PROGRAMS. THIS BULLETIN ADDRESSES CHARACTERISTICS OF THE 1996 VOLVO MODEL 850 AND 1996 - 1997 VOLVO MODEL 960. FOR THESE VEHICLES, INCOMPLETE READINESS CODES WILL NOT INHIBIT THE OBD II SYSTEM FROM MONITORING, DETECTING, AND SUBSEQUENTLY STORING A CORRESPONDING DIAGNOSTIC TROUBLE CODE IN SYSTEM MEMORY. IT CAN BE EXPECTED THAT ONE OF THESE VEHICLES EXHIBITING INCOMPLETE READINESS CODES, BUT PRESENTING NO DIAGNOSTIC TROUBLE CODES (DTCS), WILL MEET I/M EMISSION STANDARDS. *TT