Look what I've found in
X5 Dynamic Stability Control troubleshooting manual
ASC Engine Intervention
Engine torque may be reduced by:
• Reducing the throttle opening angle
• Retarding the ignition
• Canceling individual cylinders by fuel injection cutout.
The DSC III control unit determines the amount of torque reduction that is
necessary and sends the request for regulation to the DME via the CAN bus.
Could that cause power loss? because I have three beautiful yellow lights shining on my board for 5 months now. =)
anyway I will start a new thread about that