Code P0421

DARTANIAN BENSON

MEMBER
2004 HYUNDAI SONATA
2.4L
4 CYL
2WD
AUTOMATIC
203,549 MILES

Trying to find the location of bank one sensor 2 02 sensor.

Thursday, October 31st, 2019 AT 10:55 AM

1 Reply

SCGRANTURISMO

MECHANIC
4,897 POSTS

Hello,

I have included the information that you requested in the diagrams down below. Direct Trouble Code[DTC] P0421 is a DTC that sets when your Catalytic Converter has used up it's expected life span and needs to be replaced. I have included the directions on how to replace a catalytic converter below in the link.

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

Please go through the guide and get back to us with how everything turns out.

Thanks,
Alex
2CarPros

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