does the o2 sensor go before or after the catalytic converter?

1988 NISSAN HARDBODY
120,000 MILES • 3.0L • V6 • 4WD • MANUAL
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HECKEL1368
o2 sensor.
Nov 20, 2022 at 10:20 PM
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JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,193 POSTS
  • ASE Certified Mechanic
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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Nov 21, 2022 at 8:28 PM
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HECKEL1368
  • MEMBER
  • 2 POSTS
thank you. i think it does.
Nov 25, 2022 at 12:59 AM
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JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,193 POSTS
  • ASE Certified Mechanic
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
Nov 25, 2022 at 7:05 PM
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