I had the engine emissions light come up on my diesel 143 A4. I had it scanned and the fault code that came up was -

P2009 intake manifold active
00 running control static circuit low,
bank 1- below lower limit.

Mechanic seemed to think it may be a manifold inlet flap sticking possibly but wasn't too sure.
Has anybody else had this or know properly what it is. The light has been going on and off for a few days.