You'll notice that if you're able to pull codes, the limp mode that comes up is generated from a Rail Pressure Plausibility issue. Some people run into it at 100%, some at less. There are a variety of factors that I've found that can make it more likely, such as higher ambient temps, car being cold and driving aggressively, and elevation (seems higher elevations make it more likely).
'09 E93 DCT M3 - Jerez on Ext Blk Nov w/Carbon Leather Trim
Custom Tune, OEM Perf Mod, MS Stg 2 Intake, GTS DCT/Euro MDM - MR Hood Vents/sidemarkers, H8 160, tinted tails, Gloss black kidneys w/metallic M fins, V1
WTB: E93 LCI Tails w/harness - Driver heated mirror - Exhaust tips - Driver Door Panel