The codes that I had were p0420 and p0430. Bill adjusted the tune to turn off the rear o2's so these codes wouldn't arise. After he did that the codes never came back. Fast forward six months to now and I have better cats and the cayalysts and o2's read not ready on the inspection report. This is why I believe the rears were not turned off in the tune properly. It is my opinion that returning to stock would be my best bet vs trying the same tune again. Opinions? I need an answer soon. lol
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