O2 sensor locations?
Sorry to be such a noob lol. I'm pretty sure I have a failed/failing O2 and am about to have it scanned
B1S2 is after converter on driver's side exhaust pipe, B2S1 is in passenger side exhaust manifold and B2S2 is after converter on passenger's side exhaust pipe. That is where your four oxygen sensors are at in OE exhaust system.
Good luck with your problem, Chris







