I am wondering what the system looks for to determine that the transducer is not working. Do they compare mass airflow with expected based on wastegate and engine speed?
It would be nice to know what they are doing so that I could bypass the EGR.
I did that on my 1991 124 diesel by making my own boost control. The computer tries to shut down the turbo when the EGR is not working but since it no longer has control of the turbo everything keeps working. I used the OEM transducer and made my own pressure sensor and controller.