But the light was on...
Originally Posted by kennly
Guys, thanks for the feedback and reply.
The service manager called me yesterday and identify the issue as follows.
Interrogate vehicle for engine warning light on. Vehicle ran poorly and smoke came from engine.
Vehicle had faults with the inlet and exhaust camshaft sensors.
Clean both sensors and refit to vehicle.
Plus I heard from a fellow whose VANOS sensor played up that he had intermittent loss of power with no CEL for a week, then on came the light. My understanding is that cam sensors would behave in a similar fashion, as opposed to causing smoke and the engine to shut down, but I am not a BMW technician.