Welcome.
Post the exact code (it could be something else besides the O2 sensors). There are two Bank 1 (firewall side) sensors upper (11) and lower (12).
The other two are at the radiator side Bank 2 Upper (21) and Lower (22).
Bank 1 is right side of the engine (which is firewall side). Bank 2 is left side of the engine (radiator side). The front of the engine is on the right (passenger side) of the vehicle for our transverse mounted engines.
