what is p o420

Asked by Feb 01, 2014 at 10:30 AM about the Nissan Frontier

Question type: Maintenance & Repair

2 Answers

42,895

Cat converter is bad. Try changing out the O2 sensor first. If that doesn't work, you may have to change out your catalytic converter. Try rock auto for the cat converter. Usually the cheapest prices around unless you can score one on Ebay.

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116,635

http://www.obd-codes.com/p0420 --- check this out. You might find the info helpful

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