Where is bank 1 sensor 2?

Bank 1 (B1) refers to the bank that includes cylinder No. 1.
Bank 2 (B2) refers to the bank opposite bank 1.
Sensor 1 (S1) refers to the sensor that is located before the catalytic converters.
Sensor 2 (S2) refers to the sensor that is located after the catalytic converters

 

I’ll try swapping them if I can get the driver side out. It’s OG and rusted as all hell in there




QUOTE="12TRDTacoma, post: 26229395, member: 85133"]Yes. You need to make sure engine integrity is ruled out. P0138 bank 1 sensor 2 oxygen sensor if that is the code description that is indeed what the label is via FSM or similar then it is a symptom code not a cause code. I say this based upon the prior test described above. Do a quick swap and see where the code lands, if it's still the same code you may have a big problem on your hands at which point I would take a hard look at the engine integrity via cylinder leakage test.[/QUOTE]
I’ll try seapl