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04-09-2013, 12:15 AM
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#6 |
  Drives: 08 Yaris Sedan Join Date: Oct 2008
Location: California - Bay Area
Posts: 2,773
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P0420 9 times out of ten is a bad catalytic converter. Which can be cause by a bad o2 or worn out plug as some of the common causes. I would take your car to a muffler shop and see what they can do to help you. You can probably find a aftermarket one for cheap since you dont need a California approved cat. Typically about 200 installed.
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