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Does the O2 sensor go before or after the catalytic converter?

Tiny
HECKEL1368
  • MEMBER
  • 1988 NISSAN HARDBODY
  • 3.0L
  • V6
  • 4WD
  • MANUAL
  • 120,000 MILES
O2 sensor.
Sunday, November 20th, 2022 AT 10:20 PM

3 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
Hi,

Wow, I can't believe how difficult it is to find a pic of the sensor/exhaust. The only pic I was able to find shows it right after the Y pipe. See pic below.

Let me know if that helps. Also, there should be a location present on the exhaust. Are you replacing the exhaust system?

Let me know.

Take care,

Joe

See pic below.
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Monday, November 21st, 2022 AT 8:28 PM
Tiny
HECKEL1368
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Thank you. I think it does.
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Friday, November 25th, 2022 AT 12:59 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
You are very welcome. Looking at the pic above, it does appear that is the case.

Let me know if you have other questions. Also, feel free to come back any time in the future.

Take care,

Joe
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Friday, November 25th, 2022 AT 7:05 PM

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