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My sister-in-law's 2001 Altima has the P0420 code, and from what I have read it's going to require a catalytic converter. Where can I find the proper cat, and is it a do it yourself job?
 

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po 420 code

my 99 altima check engine light came on this week,got same code,i had autozone reset light,never came on again,would not rush to buy catalytic converter till you its actually bad
 

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If the car has less than 80,000 it would still be under warranty. I was not aware of this until the cat in my wife's care went bad.
 
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