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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