Check Engine Light Diagnosis

I found this nice little article on how to diagnose your CEL.
http://hondaprelude.to/articles/maintenance/check_engine.html

Also on the site (Toronto Prelude Club) is a series of well written articles on things like installing cam gears and why the +99 Preludes have five more horses than the 97-98. Good stuff.

Back to the CEL, here's a big list of of the MIL codes:
http://tech.hybridgarage.com/tech/codes.html

And another list:
http://www.151boost.com/tech2.htm

Enjoy.