I got quite the same problem on a 520d e39.
I got eeprom error dtc but the engine (ans so the vp44) has been changed.
Car works good the only problem I got is that between ~25/30 ° and 55/60° it doesn t start like it qhould. Like you it needs fews time ans when it start I ve white smoke. But it manages to keep idle without problems
Could you send me your ori files just to take a look ?
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