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HELP: Codes P0430 & P0420

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  • HELP: Codes P0430 & P0420

    I know these are o2 sensor codes, but I was wondering which ones they are. Not sure b/c there are four of em. Can ya help.
    Life is not a journey to the grave with the intention of arriving in a well preserved body, but rather to skid in broadside thoroughly used up and totally worn out, loudly proclaiming......WOW WHAT A RIDE!!!

  • #2
    The codes can be caused by several things.

    1. O2 Sensors behind catalyst converters are bad or unpluged.
    2. Catalyst converters are bad and clogging up.
    3. wiring to O2 sensors bad or corroded O2 sensor plugs.

    More than likely your converters are bad. If you have removed the converters this same code will appear a day or two later after they have been removed.

    Have a goodone!, Lee!
    Lee Stroud in West Virginia

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