Which one is Bank 2 Sensor 2

Maestro · 09-16-2019, 02:39 PM

I think I know the answer but want to check with everyone to make sure.

I believe Bank 2 is the rear exhaust down pipe and sensor 2 is after the CAT so it is item 5 in the drawing.

I got a P0056 code so I want to make sure I replace the correct sensor, I may end up changing both post CAT sensor anyway.

tony55343 · 09-16-2019, 03:08 PM

Correct #5 in that photo, it will be the rear 02 sensor on the bank 2 (rear) cat

Maestro · 09-16-2019, 04:12 PM

Thanks for confirming and the fact the sensor has its own cable make each sensor a unique part number.

Efthreeoh · 09-17-2019, 06:49 AM

I second the answer. Bank 2 is the rear three cylinders: 4, 5, 6. Sensor 2 is always post cat.

09-16-2019, 02:39 PM	#1
Maestro Major 1013 Rep 1,268 Posts Drives: 2007 335i Sedan, 2021 X3 Join Date: Nov 2006 Location: Philadelphia iTrader: (0)	Which one is Bank 2 Sensor 2 I think I know the answer but want to check with everyone to make sure. I believe Bank 2 is the rear exhaust down pipe and sensor 2 is after the CAT so it is item 5 in the drawing. I got a P0056 code so I want to make sure I replace the correct sensor, I may end up changing both post CAT sensor anyway. Attached Images
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09-16-2019, 03:08 PM	#2
tony55343 First Lieutenant 104 Rep 330 Posts Drives: 08 335i coupe 6mt Join Date: Jul 2018 Location: MN iTrader: (1)	Correct #5 in that photo, it will be the rear 02 sensor on the bank 2 (rear) cat
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09-16-2019, 04:12 PM	#3
Maestro Major 1013 Rep 1,268 Posts Drives: 2007 335i Sedan, 2021 X3 Join Date: Nov 2006 Location: Philadelphia iTrader: (0)	Thanks for confirming and the fact the sensor has its own cable make each sensor a unique part number.
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09-17-2019, 06:49 AM	#4
Efthreeoh General 17303 Rep 18,727 Posts Drives: The E90 + Z4 Coupe & Z3 R'ster Join Date: May 2012 Location: Virginia iTrader: (0)	I second the answer. Bank 2 is the rear three cylinders: 4, 5, 6. Sensor 2 is always post cat. __________________ A manual transmission can be set to "comfort", "sport", and "track" modes simply by the technique and speed at which you shift it; it doesn't need "modes", modes are for manumatics that try to behave like a real 3-pedal manual transmission. If you can money-shift it, it's a manual transmission. "Yeah, but NO ONE puts an automatic trans shift knob on a manual transmission."
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