P2006 Intake Manifold Runner Control Stuck Closed, Bank 1

Hello.

Recently replaced the intake manifold on my 2008 S6 as the old one was rattling pretty good. I purchased a new one from JHM and installed it last week but haven’t driven the car because one of my HPFP’s failed and I had to wait to get new ones (also from JHM). Now I have the fuel pumps sorted out and installed those the car is running but now I get a P2006 Intake Manifold Runner Control Stuck Closed, Bank 1. So this code is saying that flaps to the opening of the intake runners is stuck on Bank 1. (Is that the passenger side? I’m not sure).

Anybody encounter this before? After doing some reading and research there seems to be a few possibilities.

  1. Vacuum leak, cracked or cut vacuum hose
  2. Bad sensor on that bank giving a false signal (could try swapping sensor from old manifold)
  3. Bad connection to either sensor or intake manifold solenoid
  4. JHM spacers interfering? (I kind of doubt it but not ruling it out)
  5. Flaps just plain stuck and need to physically be freed

From what I have read, the most common cause on other Audi’s is a bad vacuum hose or line, so I am going to start there.

I would think that it should not be a bad sensor as this is a brand new manifold but I guess it could be possible. I may try swapping the sensors from the old manifold and see.

I did also install the intake spacers from JHM. Could the spacers be interfering? Or a vacuum leak there; there are now two intake manifold gaskets on each side doubling the possibilities for leaks. I may try removing the spacers but would rather not. (By the way, I am getting REALLY good at removing/installing the manifold).

Maybe the flap is just plain stuck and needs to be lubricated and unstuck?

Could be a cracked or cut vacuum hose on the front of the intake. I did connect and dissconnect the vacuum hose on the front 3 or 4 times. I will inspect things this evening.

Could be a bad electrical connector? All the connectors and wiring looked fine when I did the install but I will inspect again.

Any other thoughts, ideas, or suggestions? I feel like I am so close to getting the car running perfectly but not there yet. It is a bit frustrating. :’(