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Old 04-10-2020, 10:18 AM   #1
MarkSTI_
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Member#: 508908
Join Date: Nov 2019
Exclamation Subaru sti oxygen sensors

Hi. My 2016 sti has been giving me O2 sensor codes, therefore I decided to clean the rear one (downstream). The car still gives me codes and I'm wondering where the front sensor is.
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Old 05-08-2020, 01:07 PM   #2
Elbert Bass
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Member#: 283429
Join Date: May 2011
Chapter/Region: South East
Location: Down yonder.
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On the right side of the engine just below the right valve cover. The wire should run up just behind the #3 (right rear) coil pack.
Cleaning O2 sensors is a waste of time. Depending on the code and the result of related diagnostics you will need to replace one or both sensors and/or the catalyst.
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Old 05-11-2020, 08:11 AM   #3
ubarsu
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in my experience, the code thrown at you should tell you which o2 sensor is the problem. if you do end up replacing them, don't cheap out and go with OEM. i tried to avoid shelling out for them but it just costed me more of my time when i had to replace them again.
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