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If that was the case then it should of thrown both codes for both bank 1 &2 rear sensors. P0420 is bank 1 catalyst below threshold, P0430 is bank 2. It has only thrown the P0420.
Fwiw it was on a hot start on a hot day...after I got done adjusting the exhaust up on the lift.
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2016 NFG SS A8/Whipple 2.9/Fuel System/Flex Fuel |