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O2 sensor code

Tiny
HD2424
  • MEMBER
  • 2003 CHEVROLET SILVERADO
  • 5.3L
  • V8
  • TURBO
  • 246,000 MILES
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.
Friday, February 4th, 2022 AT 7:38 AM

4 Replies

Tiny
SQM
  • MECHANIC
  • 6,383 POSTS
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.
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Friday, February 4th, 2022 AT 7:55 AM
Tiny
BARRYPATIN
  • MEMBER
  • 2 POSTS
Okay, I’ll recheck codes after work and post here.
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Friday, February 4th, 2022 AT 8:15 AM
Tiny
SQM
  • MECHANIC
  • 6,383 POSTS
That sounds good. I will look out for it.
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Friday, February 4th, 2022 AT 8:15 AM
Tiny
AL514
  • MECHANIC
  • 4,710 POSTS
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
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Friday, February 4th, 2022 AT 2:51 PM (Merged)

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