Hi Mark,
I don't know what to do. Is your DTC definition refering to the Inlet cam sensor? If so that is scoping okay. Will camshaft errors stop this thing from starting.
I must say I'm fed up at the moment. The Vivaro and now this BMW! I havn't even been able to contact the owner of the Vivaro for the last fortnight.
Back to this BMW:
One would think with good fuel pressure, good spark and the injectors spraying fuel that it would start in some kind of way.
I saw on some Website last night a supposing good waveform for cam / crank synchronisation on an E39. The crank sensor and both cam sensors were Hall sensors just as on this BMW but they were synchonized in a completely different way altogether. To be honest they didn't didn't look right to me but now I'm beginning to wonder.

Peter, I am not aware of any details really. The owner told me that he had fitted new plugs a fortnight ago. I checked for a spark this morning and there was NO KV AT ALL with the coil attached to the plugs but there was 30KV whilst using a spark jumper. I replaced the plugs and the sparks worked correctly again but it still would not start
Thanks very much
Eamonn