Which O2 sensors are "Bank 1, Sensor 2" and ""Bank 2, Sensor 2"?
What is your question?
I need replacements on those ones and I'm not sure if they are upstream or downstream, I had universal ones but it still Setting off my check engine.
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Popular Answer
DaveJMon May 14, 2021
Strongly recommend GM brand sensors. "Generic" will not work properly in some cases. These are "downstream", as they are both "sensor 2" which are after the catalytic converters for both sides of the engine.
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