Hi, I have a 3.2 A3 , the engine light has come on the dash , & I have the following error codes:

2197 Stuck lean, Bank 2 sensor 1
2179 Too lean off idle
and 2415 O2 Sensor Exhaust Sample Error Bank 2 Sensor 1

I have replaced the coil packs & plugs which got rid of the misfire, but the dash light is still on & bad mpg.

Is this pointing to the pre-cat O2 sensor. I can see 2 of them, one on each exhaust, if so which one is Bank 2.

Many thanks