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Old 11-22-2005, 02:52 PM
Anonymous
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Default DTC Codes: P0420 and P0430

Hello All...

New to the forum.....

I have a question regarding my 2001 Maxima SE. It has 162,000 almost trouble free miles.

My check engine light is on, and I am getting Codes: P0420 and P0430, Catalyst Efficiency below Threshold Banks 1&2

The dealer says I have to replace both catalytic converters and all FOUR O2 sensors. That runs almost $2800 total...

I really don't think its the catalytic converter because she's running strong as ever and I have not smelled the "sulfur" smell as i've read from the other posts.

Anyone might know how I can begin to trouble shoot this??

Much Appreciated!
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