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PO420 Exhaust Code?

Well I was cruising around and my service engine soon light came on. My mechanic has a KAL-Equipment obd-II scanner and the code came up as PO420 (catalyst effeciency below

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		Nissan 370Z Forum > Nissan 370Z Tech Area > Engine & Drivetrain > Intake/Exhaust
PO420 Exhaust Code?

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05-16-2011, 03:19 PM	#1 (permalink)
Rooskey Track Member Join Date: Jul 2010 Location: South Carolina Posts: 974 Drives: 2014 Alpha7 GTR Rep Power: 17	PO420 Exhaust Code? Well I was cruising around and my service engine soon light came on. My mechanic has a KAL-Equipment obd-II scanner and the code came up as PO420 (catalyst effeciency below threshold). Any idea's on what it may be. I have FI longtubes with stock nismo exhaust.

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