I purchased an auto ODB code scanner. It is an Actron CP9125 I was able to score one for $37 on Ebay
http://www.actron.com/product_detail.php?pid=16298

I have used it on several friends cars in the last 2 days. And it works great! We were able to look up what the car was telling us, get quotes for the repairs and erase the codes (which will make the check engine light go out, until the event happens again).

Does anyone know of an online source for looking up Scion ODB codes?

The Actron manual comes with a full list of codes and a description of each, and they say most auto manufactures adhere to these codes.

BUT I would like to cross check them against the Scion codes. Does anyone know of an online resource where I can look up the codes?

By the way. My Scion was a bad test vehicle for the new device - it had no codes to check which means nothing is wrong!

Thanks