P0420 is my cat bad?

2006 NISSAN FRONTIER
150,000 MILES • 6 CYL • 4WD • MANUAL
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KYMART
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Hello, I need to put two new catalytic converters on my truck? I believe the codes were P0420 and P0430. There were no other codes displayed. What could this code be referring to on a gasoline engine?

Thanks


Jun 10, 2014 at 8:26 AM
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STRAILER
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Hello,

Yes this code means your catalytic converter is weak and cannot converter the un-burnt fuel to burn fuel. Here are a couple of guides that will help you get the problem fixed.

https://www.2carpros.com/articles/how-to-test-a-catalytic-converter

and

https://www.2carpros.com/articles/catalytic-converter-replacement

Please let us know what happens.

Cheers, Ken

Jun 26, 2017 at 9:34 PM