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Old 06-04-2010, 05:46 PM   #1
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Icon2 '01 Accord error codes P0420 & P0141

My check engine keeps coming on and off. Today I took it to Autozone and they gave me error codes P0420 and P0141. I put a new CAT on about 10 months ago, Could it be my secondary o2 sensor thats going bad? I need to take an emission test soon so I need to fix this as soon as I can. Thanks for your help. BTW its a 2001 Accord 4 cyl.
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Old 06-05-2010, 08:38 PM   #2
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Default Re: '01 Accord error codes P0420 & P0141

Was your new Catalytic Converter OEM or aftermarket? There is a very good reason why factory Catalytic Coverters cost more.
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Ok so youre saying I should replace the whole "dizzy" ?
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Old 06-05-2010, 08:46 PM   #3
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Default Re: '01 Accord error codes P0420 & P0141

Try drilling a spark plug non fouler and putting the o2 sensor in that, and that into your cat. If the cat flows to much you'll throw a code ( happens with test pipes) but if you back the plug out a little it'l get less flow and hopefully balance it out.
This is assuming of course that your new cat doesn't meet oem spec.
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