Will removing/hollowing cat throw codes?

[1 tire fire]

i have a hollow cat on my car and there is nothing wrong with my car its just threw a smelly white smoke for like a week and then it stopped.

[AllTheGoodNamesAreGone]

JAM.. you only need one O2 Sim.. for the sim behind the cat.. BUT! i would be willing to bet you $50 you that you will get a high voltage error after you install the sim.. it seems to be an issue w/ 2K and up cars.. but ymmv

~Billy

[arthansen]

I have a 2001 Firebird V6. I gutted my CAT (then I put a 3" pipe straight through it) and installed a O2 Sim. I was throwing a high voltage code so I called the manufacturer. They sent me (free of charge) a O2 Sim for a Sunbird. It worked. He said our system is looking for a lower voltage then the older V6's. I hve been running it for about 6 months with no problems. Hope this helps.

[BLLDOGG]

the sim problem has been fixed by casper electronics. look at the top of this forum