This happened to me at WOT throttle only. It didn't always throw a code. It would throw a code maybe after 3-4 back-to-back WOT runs. Cylinder 6 misfire. Only happened on my BM3 tune though. I ended up replacing the coil packs and everything is fine now.
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2015 335i ///M-Sport 8AT | M Performance Exhaust/Brakes/Suspension | BMS CP | BM3 Stage 2 | VRSF FMIC | AR Design DP | AFE Filter | RES Delete | BavAuto Coils | P3 Gauge | xHP Stage 3 |
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