Thread: The 20-Minute Japanese Trick to Unclog a Catalytic Converter (Zero Tools Needed)
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Old Feb 19, 2026 | 08:35 AM
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Default Cataclean…Science or Scam? Codes P0420 / P0430

Cataclean…Science or Scam? Codes P0420 / P0430




Hey You Can Fix It!
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If your car pops up a catalyst efficiency code (P0420/P0430) and you look for help on YouTube you will find all sorts of videos about some magic juice called Cataclean. In this video we try out Cataclean, find out what is actually in it and try a much cheaper alternative as well. Will it work? If not what is a kludge/patch/hack that might turn off your CEL for a catalytic convertor that is still mostly OK?
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