Question about 2002 Toyota Camry
The code P0420 describes the problem as
-Three way catalytic converter
-Gas leak on exhaust system
So, to say for sure wether or not you will have to replace the catalytic converter or not without looking at the exhaust system is not practical. I will tell you what is happening though.
The code is coming from your oxygen sensor. It is detecting an improper flow through the exhaust and offers a leak or the catalytic converter as the problem. What you can do is physically inspect the exhaust to see if you notice any rust through on the converter or the exhaust before or after the converter. If you do not see anything then Your catalytic converter could still be at fault as it could be clogged with carbon deposits. It is still possible that the sensor has malfunctioned and is sending a false reading, but most of the time the issue lies withinn the exhaust having a restriction or leak. I hope this helps.
Please remember to rate this solution.
Posted on Feb 16, 2009
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Mar 31, 2015 | 2002 GMC Yukon XL
Sep 13, 2011 | 2001 Toyota Camry
May 26, 2011 | 1999 Toyota Corolla
Feb 25, 2011 | 2005 Isuzu Ascender
Nov 30, 2009 | 2005 Nissan Altima
Nov 03, 2009 | 2007 Chrysler Town & Country LX New Cars
Oct 26, 2009 | 2002 Toyota Sienna
Aug 25, 2009 | 2002 Toyota Camry
Mar 11, 2009 | 2000 Toyota Avalon
306 people viewed this question
Usually answered in minutes!