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Stainless Works Cat-back exhaust and error code P0420 '16 2SS M6 non-NPP. any ideas?
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09-17-2016, 01:00 PM
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Tread
Drives: 2016 Black 2SS
Join Date: Jul 2013
Location: St. Louis, MO
Posts: 6
I've got one. I looked at the o2 sensor voltages and wasn't able to see any differences.
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