My check engine light has come on and I have replaced everything I know how to replace. I have put on a new O2 sensor and fuel filter because the computer info says I was running to rich. I have cleaned the throttle body and my light still stays on. How can I turn it off?

you might want to try cleaning your MAF sensor

My check engine light has come on and I have replaced everything I know how to replace. I have put on a new O2 sensor and fuel filter because the computer info says I was running to rich. I have cleaned the throttle body and my light still stays on. How can I turn it off?

Sounds like you've done quite a bit, must be frustrating. Here is an article that might shed some further light for you:

http://www.automedia.com/article.aspx?articleID=ccr20030601ml&page=1

Good luck!

What code did the ECM output?