Question about 2005 Nissan Quest 3.5

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I'm getting a P0420 on my Nissan. What do I have to do to fix it?

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It depends on what the main problem is.
Code 420 is for a problem with the catalytic converter. The converter is not working correctly, but the actual reason would need to be investigated. It could be the cat itself, or something else like the exhaust system or fuel system.

Posted on Apr 30, 2013

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SOURCE: 2002 Nissan Altima P0720, P1574, P0420

I have a 2002 Nissan Altima. Can anyone tell me what these codes are? And how to fix them? P0420

Posted on Jan 12, 2011

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Nissan Versa 2009 P0420 code need to get fixed. Do I change the catalytic converter right off the bat or is there cheaper routes to start with? Thanks


Someone was telling to put paint thinner to gas to burn the stuff in catalytic. Get more info.Chip catalytic still PO420 .It is big problem I have the same but did not try thinner because I changed catalytic.

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Nissan Altima Check Engine Light - P0420 Code


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Code p0420 2008 nissan altima


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I recently pressure washed the engine of my 2000 Nissan Frontier and now get DTC code P0420. What is the most likley cause of this reading?


p0420
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1 Answer

Mi Nissan Maxima 2000, have de cheking ingene on, Troubleshooting P0420 and P1320


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What are codes P0720, p1574, p0420? 2002 Nissan Altima


p0720-- auto. trans. vehicle speed sensor (revolution sensor)

p1574--automatic speed control device/vehicle speed sensor

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Apr 02, 2010 | 2002 Nissan Altima

1 Answer

2002 Nissan Altima P0720, P1574, P0420


I have a 2002 Nissan Altima. Can anyone tell me what these codes are? And how to fix them? P0420

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2003 nissan murano with check engine light codes P0420 and P0456


P0420 is Catalyst System Efficiency Below Threshold - Bank 1
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