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  • service es code P0420

    i did not drive my car for 2 days and now its shooting a code. (P0420)>catslyst efficiency below threshould (bank 1). i dont have a cat so lets start with that i have a 02 simulator that has worked fine and a 2.5 test pipe. the only thing i can think of is about a week ago i hit a car bumper and heard a loud metal clink :( (i could not avoid the bumber @70mph in the rain with cars on both sides.

    any info will help

  • #2
    Re: service es code P0420

    Mike, Where did you get the 02 sim. I have been looking on-line and have not been successful. I'm having a simular issue, but have a CA emissions veh with non CA cat convertor

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