New owner

[davedeck]

I'm a new owner of 1998 Boxster 2.5. I've had it about a month. A couple of issues hopefully you guys can help with. I've read the related threads.
1. The CEL light is on. The first code(I don't remember the number) was a minor code related to emissions so I changed the air filter to a K&N and removed the MAF, cleaned it and reinstalled. I reset the light and all was fine for a few hours. The light came back on and now I have a P1130 code. What now?
2. Is there a point where you can stop worrying about the IMS bearing? The car has 74K miles and runs great. It idles perfect and is very quiet. You can stand outside the car and can't tell it's running.

Thanks for any help.