What would a Bad IACV cause?
 

I just fixed my TPS sensor. SO now I only have 2 codes left to fix. I have the IACV and the O2. What would mess up on my car with a bad IACV. Would it rob my Horsepower, would it run a little sluggish. What I mean is what would go wrong with my car with the IACV being bad. Also does anyone know where I can get an O2 simulator. My goal is to get the check engine light to go off.

You wouldnt loose any horsepower with a bad IACV you would probally just have a loopy idel. Try cleaning the IACV before you go and purchase a new one. As for the o2 sensor try the honda dealer, let me tell you that is not going to be cheap for eaither of these parts

Well, my mechanic broke the plastic piece that you plug the plug into. IT still has the prongs on it, but the plastic piece is broke. I can get another one off ebay for about 25 or 30 bucks. I was just wondering what would it cause, and the O2 sensor I need. Will my car run any different with a O2 sensor. I have never had one plug in my car. I would love to actually have an O2 sensor. But I would be just as happy with an O2 simulator, to make the Check Engine light go off.