It would be good, as a marker and indicator, if a line was plotted on a graph when a fault code appears on the system during data monitoring. This would distinguish exactly when an error / fault has occurred and pinpoint what was happening at that time with other signals. Possible?

Yep. Did the DPF changed actuation. Drove @100 miles then have this recurring P1206 Clean or Replace Particle Filter flag coming up and putting car into limp mode. Tried a manual regeneration last night but it failed ... multiecuscan stopped it and flagged up 'Injector Setting out of permitted range...

I have this error repeating on my 2007 1.9JTD. Having just repplaced the DPF am wondering if sensor faulty or blockage further down the exhaust, etc. What exactly triggers this Engine Management Fault? Does the Differential pressure need to reach a certain value? Can't seem to see what is actually c...