I have currently using mil eliminators that are used to plug into the back 2 o2 sensors. these are used to stop codes due to (nocats) or high flow cats on an aftermarket x-pipe or h-pipe. For some reason i am getting a p0161 code which is not supposed to happen w/ these eliminators in place, any thoughts?

 

Bad set? Happens all the time. My Mustang would work fine but when we got a ton of rain they would toss codes for the rear 02s..