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#1
02-23-2012, 01:07 PM
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OBD codes
I have a 99 Chevy Tahoe, 5.7, 4WD. I had a P0303 and P0420 code. I changed my plugs and reset the codes. Is it safe to say that the misfire caused the P0420 code? Could my O2 sensor or cat still be bad? While on the highway, I would get a spudder when giving it gas, as soon as I let of the gas it would be ok. This was before I replaced the plugs. BTW, I was using AC 121 plugs and then switched to OEM AC plugs.
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#2
02-24-2012, 11:21 AM
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Re: OBD codes
There are several things that can trigger the P0420 code and a misfire is one of them. Clear the codes and if it comes back then you have to look at other issues.
__________________
57 Chevy 210 65 Olds 442 Convertible (Another one sold) 75 GMC Vandura 3/4 Ton 1999 K2500 Old Body Style Suburban (Gone but not forgotten) 05 Dodge Ram 3500/5.9 Cummins 2012 Toyota FJ Cruiser
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#3
02-24-2012, 12:58 PM
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Re: OBD codes
Quote:
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#4
04-02-2012, 04:03 PM
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Re: OBD codes
One suggestion I can give is the poppets on the spider injectors become clogged with carbon deposits overtime, apparently their prone to failure. symptoms of a bad poppet are hard starting, misfire codes, rough idle, and loss of power. Hope this helps.
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