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  1. PO420 Code

    General Maintenance, Troubleshooting & Accidents.
    Hello to all. I am new at this, but I was hoping to get some good help with getting this stupid code off my dash. So, I have been getting this PO420 code for a few weeks now. First, I got a friend to just go ahead and reset the system to turn the light off, then it came back on a few weeks...
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