So tonight I through my first SES Code. P2A03 = O2 Sensor Circuit Range/Performance. Found this after search. So I thought I would help some other out. Here is a list of all the OBD-II Trouble Codes I could find. I hope this help out others down the road.
Also here is a like I found that will tell you what the coded is. Look on the right of the page you will see a place to enter your code.
http://www.alldatadiy.com/about_alld.../diagnose.html

See attached PDF File.