The rear EGR Valve Position 1 Setting (Rear) is stuck at 50%, regardless of power-setting. I guess this means the rear EGR valve is physically stuck at 50% open. The two other values, EGR Valve Control 1 (Rear) and EGR Valve Position 1 (Rear) both follow power-setting in a sensible way, and drop to around 5% after one minute at idle. One of the values I'm sure refers to the input value from the ECU, what but is the third parameter? I would think there would be only two parameters, one for input value and one for actual physical EGR valve position.
The picture showing Air Flow parameters shows a low rear air flow, which makes sense.
Strangely, I get no fault codes for the EGR, only messages related to low airflow and airflow incoherence. Also, when I ran the EGR actuator check in Diagbox, I got no error message, but I could not hear the valve clicking.
Hopefully a new rear EGR will get me going again....