Question about 2004 Nissan Quest
How can I fix this Code?
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Posted on Jan 02, 2017
SOURCE: 2000 maxima with 84,000 miles
the code means the converter on the side cyliner # 2 is not working like it should ,to check to be sure you need a scan tool and data from the front and rear o2 sesor cannot mimic each other if they do the converter is bad ,there are aftermarket converters for that car but they dont preform as well as the factoy one .
Posted on Jul 13, 2009
SOURCE: check engine light on
Diagnostic code produces P0420 catalyst system efficiency below threshold-Bank 1. Probable causes are listed as follows:
1-air leak in exhaust before rear 02 sensor, 3-Fuel system fault,
4-faulty catalytic converter.
Posted on May 31, 2010
This code has plagued technicians nationwide. This code is set because the computer is not reading the proper signals from the O2 sensors. This could either be related to faulty sensors or just a weak catalytic converter. There is also other solutions where you can dampen the O2 sensor signal but it's extremely difficult for a do-it-your-selfer to do.
Posted on Sep 03, 2009
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