cel p0420 bank 1 help!
by adminI got an Accord EX 3.0 coupe with OBX exhaust and have a check engine light for the bank1 o2 sensor, code P0420.  Does this suggest a bad catalytic converter or a bad o2 sensor?  Also, does a high flow cat tend to trigger this code on this particular model/year?
Any help would be greatly appreciated.
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