It seems like everybody who has put an O/R pipe on there car with MIL's still has the check engine light come on. Does anybody know how to fix this for good? I heard u can get your rear o2 sensors turned off but now I hear people saying even doing that they still get the check engine light that reads for the o2 sensor. Does anybody know the permanent way to get rid of the check engine light with an O/R pipe? I'm clueless as how to fix it. I had my O/R H-pipe on for about a month then the check engine light comes on even though I have MIL's. Get the codes pulled and its for the o2 sensor bank 2 sensor 2. So I went and got that replaced and the check engine light is off for about 3 weeks then comes back on. Go get the codes pulled again exact same thing o2 sensor bank 2 sensor 2. I dont understand it cant be the o2 sensor since I just got it replaced and if it was the MIL's I dont see why the check engine light would have gone off for 3 weeks when I put the new o2 sensor on. I just want to know how to fix this for good does anybody know how to?