'01 Accord error codes P0420 & P0141
06-04-2010, 04:46 PM
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'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.
06-05-2010, 07:46 PM
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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.
This is assuming of course that your new cat doesn't meet oem spec.
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