BMW Valve Lift Glitch

May 26, 2020

This bulletin applies to 2018 BMW vehicles equipped with B46, B58 and XB1H engines. The vehicle may run rough or hesitate when accelerating from a stationary position.

DTC FC 21A02D (combustion control: valve lift correction when at idle) may be stored in DME fault memory. This may be caused by a software error in the DME (digital motor electronics module). Update the vehicle software using ISTA 4.

Program the DME using ISTA 4. 10.20 or higher to integration level 18-03-520 or higher.