there are code readers that fitt all obd2 models 1996 and up but they are a bit expensive, found one here in sweden for about 300 usd.
on the positive side you wont have to upgrade when you change cars,will fitt the following protocols:
ISO15765-4 (CAN)
ISO14230-4 (KWP2000)( some car brands 1996-2005 use this)
ISO9141-2 (Chrysler 1996-, Europe 2000- och Asian cars 1996- )
J1850 VPW (General Motors f.m 1996-)
J1850 PWM (Am.Ford f.m 1996- )
list of makes and models http://www.orebrobildiagnos.se/SMS/OBM/OBD2.pdf
The readers name is ELMSCAN 5 and can be bought in sweden on this site:
http://www.orebrobildiagnos.se/detail.php?item_id=66
Maybe you can search for this one or something like this near you.
Don`t think i can help you more than this, sorry.
Claes
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