Question about 2002 Toyota Camry
A P0420 is a code given by the PCM to indicate that it's detected efficiency of the catalytic converter is decreased - or that the catalytic converter isn't working correctly.
The PCM determines this by the readings it gets from the oxygen sensors before and after the catalytic converter. The code can be caused by a bad catalytic convertor or a bad heated oxygen sensor. It can also be caused by the fuel system if a malfunction there is trying to make the fuel/air ratio too extreme (lean or rich) to make the oxygen sensor attempt to work outside of their specified range.
I would recommend taking your vehicle to your local trusty auto repair facility and having them diagnose the issue and recommend a course of action. Don't be afraid to take it to multiple places to get second opinions.
Posted on May 27, 2011
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this 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.
Here's a link to this great service
Posted on Jan 02, 2017
Tips for a great answer:
Jan 16, 2016 | Cars & Trucks
Sep 29, 2017 | Mazda Cars & Trucks
Dec 13, 2010 | 2003 Lincoln Aviator
Oct 16, 2010 | 1997 Chevrolet Lumina
Oct 13, 2010 | 1997 Honda Civic
Jul 03, 2010 | 2004 Mazda RX-8
Feb 24, 2010 | 2002 Chevrolet Monte Carlo
Sep 02, 2009 | 2002 Toyota Camry
May 29, 2009 | 2000 Chrysler Concorde
439 people viewed this question
Usually answered in minutes!