P0159 which sensor is the bank 2 sensor2 on a 2007 BMW Z4 2.0

Question

I've got the p0159 code on my 2007 BMW Z4 2.0l - which sensor is the bank2 sensor 2.

I can find 3 in the engine bay (2 pre cat and 1 post) also a further sensor under the car halfway along the exhaust.

Answer 1

P0159 02 sensor circuit slow response (Bank 2 Sensor 2)

This is the catalyst monitor sensor or the downstream 02 sensor . This is for the one behind the catalytic convertor.