Thanks so much for your reply. I am not getting a code for the cat converter, but for sure I have put in four 02 sensors so far trying to clear the code. I also changed the elbow intake, the disa and the MAF sensor because I was getting a bunch of codes: P1092, P1091, P1093, P0171. The Stealer says if all else fails, I need a cat converter, but I am getting no code for it and like you, don't want to fork out that kind of money and the CEL is still lit.....