engine codes description

[nikoz]

OBD-II Trouble Codes Information and Diagnosis | Engine-Codes.com (http://www.engine-codes.com/)

[oldford]

Nice list, but very incomplete. I always use:
DTCSearch.com - Search Engine for OBD-II Diagnostic Trouble Codes (DTCs) (http://www.dtcsearch.com/)
OBD II Diagnostic Trouble Code (DTC) Definitions (http://www.aboutautomobile.com/DTC)
Diagnostic Trouble Code Library (http://www.eobd2.eu/DTCL.asp)
These 3 sites support all of the codes from the 2007 release of J2012.

[nikoz]

fault codes for VW
Automatic Redirection... (http://www.openobd.de)