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this is a fix that has been done by many people so dont immediately discard it. add 1 gallon of laquer thinner to 1/2 tank of gas and drive until most of the gasoline is used up. laquer thinner contains mostly toluene the strongest intake system cleaner there is. it will clean your cat converter. this will get rid of a P0420 code. it was 1st talked about on scotty Kilmers you tube channel. then Eric the car guy tried to discredit Scottys fix by not following Scottys directions and using far less laquer thinner. so it did not work for him as he only used one quart of laquer thinner.
 
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