subaru20gl

Hei! After years of faultfinding due of "check engine" on my Legacy 90 model, I have sold it and got me a 99. mod. station wagon. Recently it passed 100k km and suddenly the idiot lamp starts to light after start up, but goes out after some kilometers. I found those green and black connectors below the steering column and reading faultcodes: 12, 22 and 54. I belive I can not use the same translatetable I used on my 90 mod., because the new one are using a OBD version 2. How do I read the table "Subaru OBD2 Codes" that are presented on http://www.troublecodes.net/Subaru/ ? It dont "fit" my codes 12, 22 and 54 ???? Kindly Svein Olav