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Discussion Starter · #1 ·
a few weeks back, my check engine light came on. After scanning, the only code was P025A - “Fuel Pump Control Module Circuit/Open". This code stayed on for a day or two and then went away. A few days later, it came back and then went away - this cycle continued for a week or so and then it went away and didn't come back on....until yesterday.

While out around town, I parked the car somewhere and it began to rev on its own while parked (from about 800-900RPM to 1600-2000RPM). At first, no engine light was on but after driving home, that came on. The engine revving only occurs while idling (either in Park or Neutral), if I put it in gear, it does not act like it has any problems. It has no issues starting and does not run rough, just revs up and down. This has happened before and it was the PCV valve so I thought that could be the case again but there is no air coming out of the pinhole on the top of the PCV valve so maybe there is a vacuum leak somewhere else?

Now I have 4 codes that have come up:
P025A - "Fuel Pump Control Module Circuit/Open"
P0507 - "Idle Control System RPM Higher Than Expected"
P2189 - "System Too Lean At Idle Bank 2"
P2187 - "System Too Lean At Idle Bank 1"

The car is also leaking oil and has been for 6 months or so, however it has always been just a little - I would need to add a quart of oil maybe once every other month. Now though, there is visibly more oil and it is getting on the belt and getting sprayed around. I believe the oil is leaking from a seal behind the crankshaft pully. And now when the car is running and I put my hand down there, I can feel air blowing from somewhere...

So this all leads me to several questions that hopefully somebody can help me with...
1. Where is the fuel pump control module on a 2011 VW Touareg VR6 FSI? Under the back seat in one of those access holes?
2. What are the chances the fuel pump module is causing the lean conditions? I find it odd that i have an issue with my fuel pump and also something else going on like a vacuum leak that is causing the lean condition, however i do feel the air when i stick my hand down there and can hear a hissing noise.
3. If the oil is leaking from a broken seal behind the crankshaft, could this also be the source of the vacuum leak? Maybe it has gotten worse and now its to the point where it is causing more of an issue than just oil leaking?
4. What would you try and fix first? the Fuel Control Module or the Vacuum leak? I am not sure how to tell if one is causing the other or if both are occurring simultaneously but I would like to avoid fixing something that doesn't need it if possible.
5. Are there any resources for fixing a leak from behind the crankshaft? I assume you have to take the radiator off to gain access and see what you're doing? Any good videos that walk through this?
6. Where would you start to troubleshoot this and figure out what needs to be done?
 

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The tool shows that you have 10 codes.
Please list all 10 codes to start off.
You're just flooding the post with displays, but I don't have that scanner and as such I haven't read it's user manual or what all those relate to, or if there's more detail to be obtained, etc.

So far, I can see you're not getting enough fuel.
 

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Discussion Starter · #8 ·
That is all of the info available on this tool. I was trying to send you as many pictures of the data as possible so you would have all of the info. I showed the additional live data because I wasn’t sure if it would be valuable.

the additional codes listed are the same codes but they show as pending or permanent vs stored.
The 10 codes are:
P2187 shows pending, permanent and stored.
P2189 shows pending, permanent and stored.
P0507 shows pending, permanent and stored.
P025A shows as stored.

So you’re seeing not enough fuel? Would you think the fuel control module would cause that? Any thoughts on why the issue is only when the car is in park or neutral, when in gear, even idling in gear it has no problems.
 

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Well that tool is special.... counting the first 3 codes as 9 codes (3x each) plus the last code for a total of 10.
I'm saying not enough fuel, because that's what "too lean" means, and that's what you're typing and your tool is showing.

You've mentioned "feeling air" in your first post.
Where exactly are you sticking your hand when you feel this?
 

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Discussion Starter · #10 ·
Haha yeah I thought the same. If you stick your hand down in front of the engine by the Pullys you can feel air by the crankshaft but I am not sure if that air is coming from the pullys moving or the radiator or from a leak. I also have a passat and stuck my hand in the Same area and don’t feel any air but the engine on the passat is turned so the pullys are also not right next to the radiator.
 

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You need to ensure that you do not have a vacuum leak anywhere.
-- Check for a vacuum leak from an unseated oil dipstick or oil cap missing gasket or loose. Check engine gaskets for sealing (valve cover, or other external gasket that may have traces of oil leaking will also cause the unmetered PCV system to draw in additional air not measured through the MAF sensor.
 

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things to check/try
Clean your throttle body and idle air control valve. This valve is so small but I have had it wreak havoc on so many engines. Check your vacuum line to your brake boosters. From what I understand the eggs have 2 vacuum brake booster pumps and one line is prone to cracks. Also may check your fuel purge solenoid. This solenoid gives funny issues like you mentioned when it's on its way out the door. It's responsible for closing the fuel rails when the engine isn't running to maintain fuel pressure. When the solenoid fails completely the engine will flood just by filling your tank...
 
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