Is this necessary for the car to re-learn all the settings again? I understand the PCM on the 02 is reset by pulling fuse #13 for clock backup with the car off. Any issues with a PCM reset, like entering the radio code again?

 

It's really not as big of a deal as a lot of people make it...especially on something like a throttle body cleaning. The car will learn the small difference in air volume within a few drive trips. If you're going to do it, yes make sure you have your radio code handy...obviously assuming you have a factory radio, which it appears you do.