P0037 HO2S Heater Control Circuit Low (Bank 1 Sensor 2).
 

Bank 1 Sensor 2 is the rearmost sensor in the short cat pipe just before the exhaust center section. the one directly under the car.

Please can you advise if this sensor is part no. 22690AA520, I am getting confused with the other sensor on the downpipe.

one is at the rear. the other is at the front.

I think I need the rear one that will clear code POO37 ?

It has : 2 x black wire, 1 x white wire, and 1 x blue wire .