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01/01/2025 10:01 pm
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I have a 2004 Toyota Camry SE with a 3.3l V6. It's showing a P0420. I've also noticed a rattling noise. With a P0420, which would be the catalytic converter that'll need replacing? Would it be the one nearest the radiator or the firewall?
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01/01/2025 10:09 pm
While it is possible you have a bad catalytic converter don't overlook the other possible causes for that code.
https://www.walkerexhaust.com/support/tech-tips/diagnosing-catalytic-converter-p0420-code.html
https://www.carparts.com/blog/p0420-code-catalyst-system-efficiency-below-threshold-bank-1-2-2/
https://www.obd-codes.com/p0420
