Have a P0157 diagnosed as Bank 2 Sensor 2. Having multiple answers to its location on the net eg; front behind the radiator, before and after CAT con. Any answers, diagrams welcome..Thanks

 

o2 sensor is downstream on the pre-cat. mixture sensor is upstream on the manifold. the code is for 02 sensor circuit, which is not necessarily due to a bad sensor. could be thrown if your injectors are leaking too.
you'll find diagrams in the FSM which you should download ASAP regardless

 

FSM???

 

as in Factory Service Manual