[Underpowered]

you actually have to have your computer re-tuned. a code reader will turn the cel off, but it will come right back on as you can't re-tune the computer to actually turn the O2 sensors themselves off.

well i would cut the cats off and buy a tune then. i bought headers when my cats went south as it was about teh same price, then spent $200 on a tune from blackbear.