Have this this guide
https://www.6post.com/forums/showthread.php?t=803495 and the websites newtis.info and
https://realoem.com/ handy as you are troubleshooting. If you don't have a tool that you can scan and data log to or a windows computer with ISTA; I'd suggest taking the car to a reputable bmw/euro indy repair shop to pay for the diag.
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2015 F06 M6 Silverstone Metallic II, Individual Full Leather, B&O, Night Vis, CCB, RKAutowerks (CP Rods/Pistons, DI Cams, CF Intakes, Coated DP's & Billet Diff Brace), InfinityAuto Turbo Inlets, Mishi Oil Cooler, JB4, XHP S3, BM S3