diagnostic code PO420 shows up,what is the problem

Asked by Feb 14, 2014 at 05:56 PM about the 2005 Toyota RAV4 Base

Question type: Maintenance & Repair

check engine light comes wjth motor running,plus the tech light comes.

1 Answer

118,005

http://www.obd-codes.com/p0420 -- check this out.

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