[MrMCar]

BMW (and many other manufacturers) strongly advise the use of "Stabilant 22" for applying to the connector pins, both male and female for such instances. It's fooking expensive, but if there's a connection issue with the pins and varying resistance is the root, the Stabilant usually fixes it.

FYI.

 

[MrMCar]

On the face of it, I'd have to agree. Throttle faults are checked/run/error flagged as an EML fault. CCV system has no tie-in with the EML.
Maybe a coincidence, whilst fiddling with the CCV a better connection was made with the throttle connection?
Ask @kburger. He's been going down this path for some time.