Quote:
Originally Posted by getarz4u15ster
I thought that the tuner would have turned the rear 02's off in order to pass readiness checks later for emissions.
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if you disable/turn off the rear O2 codes, you will
not pass emissions readiness tests...
because the rear O2's are used to determine how your CAT's are functioning... and if they're disabled, then they can't "report" on the cat functionality/efficiency...