I have got those codes sometimes too... and its weird because I know my smog pump and tab tad solenoids are working... literally have checked everything...
I have heard that sometimes it just goes away...?? I haven't checked my error codes for a bit... just did a exhaust job and used some high temp silicon... so I don't want to start the car for about 24 or so hours... but I will do another code check.. and see if I am still getting those codes... if I am... would like to try to make sure I'm not missing something.. will let ya know in a few days..