Checking my F21 with an ODBC reader I've got a P22AE code which is Bank1 Sensor2 O2 sensor issue.

Checking the BMW Diagram the 2nd sensor is number 5 but the only problem is that the diagram doesn't match my DPF.

Has any changed the post cat/dpf o2 sensor on a 2015 F21 with a B37 engine? Does anyone have an idea of the location of this sensor? 

I'm guessing that its done from under the car rather than via the engine bay.

 

Any idea's?

 

 

Hi Andy

Welcome to the Forum

Don't know if you are aware of www.realoem.com put the last 7 digits of your Vin in the search box it will bring up your model, then check the exhaust section you should find what you need.

If you double click the part number if there are any alternatives it will give a list

Dave

From memory there is a manifold pressure sensor under the manifold as well

Thanks for your reply Dave. I've been using that website but the problem is the diagram (posted above) doesn't match my DPF. No1 and No2 are switched on my DPF.

I can find the post temp sensor No 4 but I just can't locate No 5 the post o2 sensor.

The quest will go on. 😃

 

Looks like you have to get under then Andy I have changed a Turbo on one of these that was an adventure as well. The car was stuck on my drive for over a week as twice the wrong exchange turbo was sent

Good Luck 

Dave