Have code PO422

2001 VOLVO S60
196,000 MILES • 2.4L • 5 CYL • 2WD • AUTOMATIC
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ROBERT108
  • MEMBER
  • 1 POST
Come back codes PO422 8 mounts have replace bought two O2 sensors.
Need help to pass inspections.
Do not want to change expensive catalytic converter.
Oct 23, 2018 at 6:36 PM
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DANNY L
  • CERTIFIED EXPERT
  • 5,648 POSTS
Hello, I am Danny.

Sorry to inform you but the code you provided is showing the catalytic converter for Bank 1 is deficient. Replacing the O2 sensors will not fix the problem. I have attached a tutorial showing what is involved. Hope this helps and feel free to ask any questions. Thanks for using 2CarPros.
Danny-

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

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

https://www.2carpros.com/articles/catalytic-converter-replacement
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Oct 24, 2018 at 3:58 AM