Hey guys, I got a check engine light that's been on for a little and I checked it out and its the cat under threshold code. The thing is it was a new cat I put on the end of July. I heard this can cause the light though. But...just the other day, when I come to a stop and it sits there idling a little bit...the light will start blinking but if I press the gas it goes back to solid again. What could be the problem here? I never had a blinking one before so it doesn't look good to me. My car also seems to bog really bad when I try to start it up sometimes after it's already warmed up. After it starts idling normal though it runs great.

Also, I wanted to get rid of the light from the Cat so I heard getting a new O2 Sensor should fix it. I should replace the one on the Cat not the headers right? Is this a good one to buy?

eBay Motors: PCK O2 Oxygen Sensor Acura INTEGRA Honda CIVIC 14659 (item 140047527282 end time Nov-09-06 08:00:49 PST)