Andy Smith

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. 😃

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?

Have you checked the weather protection plate(s) behind the disks are not catching the disk?