: O2 Sensors for 97 STS

alan erickson
06-26-05, 09:42 PM
Where are the O2 sensors for a N* in a 97 STS located, and what AC number (like AC 98, AC 123, etc.) is correct for each respectively? I have heard there is one in the exhaust from each bank and one just prior to the cat and of course, one after the cat.



06-26-05, 10:12 PM
One on eack manifold, one pre-cat and one aft-cat.
Bank 1 Sensor 1 = Right Bank (rear) manifold
Bank 1 Sensor 2 = Pre-Cat
Bank 1 Sensor 3 = Aft-Cat
Bank 2 Sensor 1 = Left Bank (front) manifold

No idea on numbers.