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. :’(

There a bracket that needs to be removed when installing the spacers. Otherwise, one of the flaps stick open because the actuator hangs up on the bracket. This is well documented in a few threads. I’d start there.

Yeah i have the same issue, even though i haven’t gotten around to removing it yet i think the solution is step 10b here–> http://audirevolution.net/forum/index.php?topic=4641.0

i’m not a “gear head” so IDK if the difficulty level is similar to replacing a coolant tank or the air filters.

You know I searched for hours last night on the internet but forgot to search here for that problem.

Pretty sure this was my problem. I had removed all the engine lift brackets (even the two rear ones as it made tightening up the rear fuel lines much easier) but I did not remove that small vacuum hose/wiring harness bracket at the front drivers side of the engine.

I just removed it and tested the actuators and they seem to be working fine. I would expect my P2006 and P2007 codes won’t come back.

The thread that I found was this one: http://audirevolution.net/forum/index.php?topic=3790.msg109445#msg109445

Thank you everyone for your help.

Another update.

No more P2006 or P2007 codes. So that little son-of-a-bitch bracket was the problem.

But…

I now have new codes: P1081, P1085, P2189, P2187. These are all codes pointing to a lean mixture so I most likely have leaks or a leak somewhere.

I suspect it is my air distribution housing as where one of the throttle bodies bolts to it, the bolt hole is cracked and the surface is distorted. It looks like a previous mechanic tightened up too much on it and screwed it up. I knew this would be an issue so I bought a used Y-intake pipe on Ebay and am hoping it will be here tomorrow. So I will start there.

It just seems to be one thing after another but I will keep plugging away at it until everything is sorted out.

As soon as I saw this thread. I said to myself. Remove the bracket. Good that you have it sorted out. Yes those codes are usually from a small leak somewhere.

Yes, vacuum leaks. Very annoying. I would think that both the new intake manifold and the gaskets sealing the manifold to the block would not be the source of the leak but not ruling that out.

Like I said, I am going to replace my air distribution housing and the PCV.

I am also going to try to use some propane to try to pinpoint the leak. From what I have seen and read this can be the cheapest and safest way to do it. The video I watched, the guy put a flexible hose on the end of a propane bottle/torch then was able to put the propane precisely where he wanted it. I am going to try that.

Thanks for all your help and encouragement Justincredible.

Starting Fluid has worked for me too.

I just did a quick search on the interwebs for P2187 and P2189 codes together as that is what I am now getting after clearing the codes yesterday and driving today.

One of the google search results that came up was a JHM page for the S6/S8 Vent Hose, Oil Separator to Valve Cover. That is the hose that connects both valve covers to the oil separator/PCV.

I have not diagnosed my problem yet but this could also be a possibility as my hose has some electrical tape wrapped around the end near where it connect to the PCV. Looks like another shitty repair made by a the shitty mechanic who previously screwed up the air distribution housing.

I had my oil separator go right after a removal of my IM.
Maybe you’re lucky like me? :wink: Might replace anyway?
But, if you have electrical tape, safe bet is that’s the problem.

Yeah, I am going to replace both just to be sure. The car has 70.5k miles and it is still the original PCV. I have one on order from ECS. I had found in another thread that this was the problem another person had with getting similar lean codes. He has a small rip in the diaphram in his PCV.

I also just ordered the PCV/valve cover hose from JHM.

I intend to keep the car for a long time so replacing these parts is a good idea regardless.

The initial costs are painful, but after that its all good. Seems there’s a handful of common problems everyone deals with and then it’s smooth sailing for the most part.

That is good to know. Thanks.