This bulletin applies to 2019 and later BMW vehicles (2 Series, 3 Series, 4 Series, 5 Series Sedan, 6 Series Gran Turismo, 7 Series G12 and X3 Sports Activity).
The vehicle may run rough or hesitate when accelerating from a stationary position. DTC FC 21A02D may be stored in the DME fault memory (combustion control: valve lift correction at idle).
The cause may be a software error in the DME (digital motor electronics). Update the vehicle software using ISTA 4.27.10 or higher to integration level 20-11-500 or higher.
Determine the vehicle’s current I-level by either using AIR or the Key reader/ISPA NEXT application. If other faults are present, address/repair those faults before proceeding. Do not replace any parts to specifically address DTC FC 21A02D.
For information on programming and coding with ISTA, refer to CenterNet/TIS/Technical Documentation/Programming and Diagnostics/Programming Documentation. When vehicle programming is complete, the “Reset Valvetronic list application” and “Learning Valvetronic limit positions" test plans must be performed using the following plans in ISTA/D: Note that both of these test plans must be completed after vehicle programming or the fault will return.
Perform the Reset Valvetronic Lift Adaptation Test plan
Select Vehicle management
Select Service functions
Select Powertrain
Select Engine electronics
Select Reset adaptations. Run ABL.
Select Reset Valvetronic lift adaptation and follow the prompts on the screen to clear the Valvetronic adaptions.
Perform the Valvetronic Lift Adaptation Test Plan
Select Vehicle management
Select Service functions
Select Powertrain
Select Engine electronics
Select Adjustment programs
Select Valvetronic lift adaptation and follow the screen prompts to calibrate the Valvetronic system.
