Read the entire post and you would have your answer.

 

Well this is just an update, I replaced the upstream o2 sensor that das2123 told me to, and I tried to replace the fuel filter (but thats another story)[:@].
Results are after reseting my pcm, I drove around for about 20 miles, and the service light came back on. It still states the same codes o2 sensor is malfunctioning, so Im going to replace the other one (downstream), and engine running lean, now that I ordered the right part ( thanks winsettz) Im going to try to replace it. I really hope this works. what do you guys think?