Hi folks,
just to let you know: It's still there, the MIL that lits. From a mechanical point of view a perfectly running engine, with superb fuel consumption. From an electronic point of view: not to trace what where happens.
Because of the expected manipulation of the engine management systems software, once the car was overnight at a BMW dealership. All software replaced and updated where necessary. Engine runs even more smoother as before, but bringing it to 2100 RPM for 30-60 seconds, the P4501 fault occurs again, over and over.
Question: somebody of you familiar whether one can compensate or adjust the EGR/Fuelsystem with some units just enough to remain "in balance"?

Curious for your answers, I'll give you my best regards.
Ger