Engine shutters when cold, CEL flashes, steady then drives fine

[Bouchedag84]

Hey guys,
Here I am again, unfortunately, so I have my alternator/regulator replaced by and indy shop when I got the transfailsafe code. Everything seemed fine, drove around fine for about a week.
Went to run an errand and started the X and it shivered and shook a little bit, then the check engine light came on and stayed on. Drove around a bit and it remained on but the vehicle drove fine. Hooked up my laptop and bmw software and this is what I got.




I cleared the codes and went for a test drive. Drove the X around for the remainder of the day without any shivering or warning lights. Start it up this morning and same thing, it shook a bit this morning and it subsided rather quickly, the CEL stayed on til the end of my short street and it turned off and the vehicle drove fine. Drove around doing errands and all was good. The vehicle is now parked and I don't know what to do.
I have googled and lots of people say it's the oil seperator causing a misfire? What are your thoughts? I really don't know what to do. It's scheduled to go in on Monday to the Autobody shop for the front quarter panel/bumper being fixed for about a week or so. The indy is literally next door to this Autobody shop. Do you think them changing the alternator caused anything? What can I do today/tomorrow (Saturday/Sunday) before taking it and leaving it at the autobody shop for a week?
Thanks in advance,
Also, the temperature is not cold, it's like 0C, it was probably even closer to 8C when the shaking happened initially