RepairPal Certified shops can diagnose and repair your 1995 Nissan 200SX. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
It's OBD1 so you have a couple choices, use the factory MIL check or if possible find a dealer that still have the Nissan Consult 1 reader.
Instructions here
http://www.troublecodes.net/nissan/