Audi 2.7 tdi 2007 DPF G450 sensor help needed please

Hi, I have a dpf blocked error code which I believe is caused by a failed g450 sensor. Just wondering if anyone knows the measuring block numbers to view sensor data, ie dpf pressure, soot levels, ash content etc. I think this is an early dpf model and advanced measuring blocks is greyed out on the vcds.

BTW I think the 2.7 tdi is just a short stroke version of the 3.0 tdi.

Any help greatly appreciated.

Audi 2.7 tdi 2007 DPF G450 sensor help needed please