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I seem to be having an issue. I can get the rear O2's to pass OBDII test, but now I am getting a cat code. D'OH! Does any one have a datalog of the rear O2's or know what they should see? If so please email it to me .
Ok the rear o2s should be almost steady, and no fluctuating as fast as the front o2's.. if your cat is bad the rear o2 will fluctuate about the same rate as the front, meaning the cat is not doing it's job...
That sounds about right, they idle a little leaner than 14.7 which is about 450mv... I'd say you are good... or your cats are in good shape as well...
Mo