Just bought an offroad h-pipe for my 2000 GT vert. Was wondering if I need to install the rear o2 sensor and disconnect it or just leave it out and plug the hole. Right now I have them screwed in and reconnected to the wiring harness. Was expecting the check engine light to come on, but so far that hasn't happened.

 

It takes mayb a week or so for the light to come on sometimes. I had mine on for about two weeks and no light b4 I put some MIL's on it and no light. I would say let it go til you get a light and then buy a set of MIL eliminators

 

It will toss a check engine light just give it some times. Plug them in and screw them in. Once you get the light you can get either MIL's or a tune to turn off the rear o2 sensors.

 

Thanks for the info.I'll keep my eye on it. I have a Predator so I will be able to turn it off.