Automotive Diagnostics and Tech Information Links
Bat Auto Technical
Got a fault code that you want to interpret Go Here! Its free and gives you access to thousands of fault codes definitions and fault extraction procedures. Look in top left of page for trouble codes and then scroll down list for OBD2. Also on this site are many technical articles.
IATN
A good site for automotive professionals. Post your “impossible’’ to fix vehicle problems on this site with free membership. Sponsoring members are able to search the archives, chances are someone's had the problem before you.
Worth a look at least for all the free technical material. Must be a legitimate workshop to join.
Motor Magazine Articles
Hundreds of articles discussing current trends, diagnostic techniques and repair procedures. Worth reading for the wealth of new information that can be learned from this site. Highly recomend.