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#1
12-21-2008, 08:36 PM
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Enginge light P0420
I have a friend that has a 2003 Toyota Matrix and she has a check engine light,P0420,cat is not working properly. Ive already changed the spark plugs,and before i go tell her to take it to toyota dealer ship should i replace the Oxygen senors first?The one after cat??Or should I let toyota Diag it and charges me 50$ and tells me that it might me the O2 sensor?
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#2
12-22-2008, 07:10 PM
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Re: Enginge light P0420
Check this page out:
http://www.obd-codes.com/p0420
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