Oxygen Sensor Locations
#3
Registered Member
Aren't those the post-cat/downstream o2 sensors? The pre-cat or upstream ones are much further up in the engine bay, and harder to reach with regular tools.
#4
If those are post cat/down stream why are they before the catalyst? Do we have 6 sensors total? I thought 2 are on headers which would be difficult. Dumb ? Just sitting at work trying to figure out how i’m going to tap into downstream o2 for ethanol sensor and wideband o2 voltages.
#5
Registered Member
I just realized those are aftermarket cats. The OEM cats sit in much higher in the engine bay, and the pre-cat ones are basically right near the header/manifold flange.
The picture above shows roughly where the downstream ones would be if OEM, but yes, those are indeed pre-cat. There are just four O2 sensors, two for each bank.
The picture above shows roughly where the downstream ones would be if OEM, but yes, those are indeed pre-cat. There are just four O2 sensors, two for each bank.
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Bravo at (06-07-2018)