O2 sensor code

2003 CHEVROLET SILVERADO
246,000 MILES • 5.3L • V8 • TURBO
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HD2424
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  • 190 POSTS
My bank 2 sensor 2 had a code. I changed O2 sensor. Code came back. My question is, could the new 02 sensor be bad or catalytic converter going bad? Truck runs fine code or no code.

Thanks for any help.
Feb 4, 2022 at 7:38 AM
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SQM
  • CAR REPAIR CONTRIBUTOR
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Hello,

It is possible to have a defective part, it can also be due to a faulty catalytic converter or issue with the oxygen sensor circuit.

Many times, these codes are just emission related and might not impact drivability. But it will not pass emission inspection, if you are in a state that requires it.

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

Which code did you get was it P0420? or was it a different one?

Let me know if there were any other codes.
Thank you.
Feb 4, 2022 at 7:55 AM
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BARRYPATIN
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Okay, I’ll recheck codes after work and post here.
Feb 4, 2022 at 8:15 AM
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SQM
  • CAR REPAIR CONTRIBUTOR
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That sounds good. I will look out for it.
Feb 4, 2022 at 8:15 AM
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AL514
  • CAR REPAIR CONTRIBUTOR
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Hello, what code are you exactly getting? There are different oxygen sensor codes that mean different things.

https://www.2carpros.com/articles/how-an-oxygen-sensor-works

https://www.2carpros.com/articles/how-to-test-an-oxygen-sensor-02-sensor
Feb 4, 2022 at 2:51 PM (Merged)