earlier this year i bought an '03 v6 that had the cats cut off. it was throwing o2 sensor above or below threshold codes. i then installed a set of mils and it seemed to have the problem with the cel. about a month ago the light came on again so i put a code reader on it and it stated right bank rear most o2 sensor bad. i changed the o2 sensor but light came back on. i called american muscle to see if it was a possibility that maybe the mil had gone bad and they sent me a new set. i changed out the mil a few days ago and then again y-day morning, the cel came back on. anyone have any idea as to what may be causing this and a fix for it. the car runs the same as it always has but having th cel on irritates the hell out of me.

btw, everytime the light has come on i check the code and it is always the same, right bank rear most o2 sensor bad. thanks, boomhauer.

 

Mils rarely work well, if at all. The only true fix will be to get a tuner of your choice and have them turn the rear 2 off within the tune. I just went through this after getting my headers and cat delete. I tried my best to trick the system, but wasn't happening. Tuner+tune= FTW.