turboshed

My 2010 A8 d4 4.2TDI has a fault code showing for - Intake Manifold Flap - Bank 2 p2005 stuck open. The engine light isn't on and the car doesn't fell any different.

I was on the understanding that this fault relates to the actuators (2 of) that the control the intake manifold flaps. I can see them both physically working when the engine is revved. With VCDS i am unable to clear the codes as it says something like "the request was not acknowledged by the controller"

Any ideas