P2187... PCV and oil consumption

[betyouaint]

Ok... around a year ago my 2006 A4 2.0T went in for a a few issues. While it was at the dealer they pulled a few TSBs and replaced the PCV and something else... maybe in the throttle box?

Anyway, after the work I noticed that my oil consumption went from less than 1QT in 10,000 mile to 1QT every 1200 miles. Coincidence...? The dealer carried out a number of oil consumption checks and declared that all was good. [headbang]

Recently I have noticed that the engine "bogs down" when I come to a stop, almost like it's gonna stall out. It has also started to throw a P2187 code every few hundred miles and this seems to coincide with coming to a stop and the engine returning to idle.

I've searched around the forums and have tried checking the vacuum with the oil filler cap removed. When I remove the cap, there is definitely some vacuum but the cap isn't overly difficult to remove. Also, with the cap removed, the engine bogs down even more and idle becomes very erratic. Do these symptoms suggest a bad PCV valve or is this normal for this car?

In my mind, I'm trying to tie the changing of the PCV in to the increased oil consumption but have read that this is unlikely?


Excerpt from Ross-Tech Troubleshooting:


18619/P2187/008583 - Bank 1; System too Lean at Idle
Possible Causes

Injectors leak/blocked
Air Intake Leak (after MAF)
Exhaust Leak

Possible Solutions

Check Mass Air Flow Sensor (G70)
Check Injector(s)
Check Fuel Pump
Check Activated Charcoal Filter (EVAP) System Solenoid Valve 1 (N80)

Special Notes

When found in the NAR 2.0T (BPY) check RVUTB: 01-09-03 or 2018919 for updated Crankcase Breather Valve
If the breather valve is faulty, full engine vacuum is typically found when removing the oil cap at idle.

[Sal@EliteMS]

Sounds like you need a new breather valve. But 06 is a split year so make sure you get the correct valve and tube that goes from valve cover to turbo housing. It's an easy fix. Good luck.

[betyouaint]

Thanks... is it possible the dealer installed the incorrect one when they changed it a year ago?

How would I check...?

Might that be the problem?

[Tanner]

What did the work order show from the dealer? Did it mention that the PCV part number, was it 06F-129-101 N or 06F-129-101 P.

[betyouaint]

What did the work order show from the dealer? Did it mention that the PCV part number, was it 06F-129-101 N or 06F-129-101 P.

Unfortunately, it doesn't show much at all and it doesn't make reference to either of those part numbers. It doesn't even say exactly what was done under the "warranty extension campaign" item other than describing all possible actions to satisfy the update, i.e.

Perform inspection and/or replacement of the pressure control
valve and breather hose --- 01830099 - .4 inspection only
8P/8J - 17261990 - .4 replace valve - 17262099 - .6 both
8E/8H - 17261999 - .4 replace valve - 17262199 - .5 both

I'm pretty sure they replaced rather than just inspected as I remember them looking for the parts.

The work was done in April 2013 and I've covered 35,000 miles since then. Should I replace the part myself or let them diagnose (or mis-diagnose) the problem. I believe the part is around $100 but how much is the dealer likely to charge for diagnosis and repair...? $300... $400... $500...?

And why are there 2 different parts numbers...? What is the difference...?

I've added a photo but I don't think there are any useful identifying markings...?

http://www.legoheads.com/PCV01.jpg

[Tanner]

I think you have the P revision, from what I can tell the N revision doesn't have that "RSV" stamp on the top where the P version does. And they also replaced the breather tube which is required when replacing the P version.

Given that it only has that mileage on it, I'm not sure if replacing it would resolve the oil consumption, I suppose you could try, it's pretty simple to do. Have you tried the oil cap test while the engine is idling?

[betyouaint]

When I remove the cap, there is definitely some vacuum but the cap isn't overly difficult to remove. Also, with the cap removed, the engine bogs down even more and idle becomes very erratic. Do these symptoms suggest a bad PCV valve or is this normal for this car?

From the research I've done, it looks like one version of the PCV had a flat top on the actual valve diaphram. Is it possible that this flat-top is the N version? And the profiled top is the P version?

Also, how would I know if the breather was changed when the PCV was updated? Is it possible that Audi updated the PCV valve but didn't update the breather..!!? What effect might this have...?

And given that the PCV "recall" was for 10 years/120,000 miles, would mine still be covered, despite the fact it has been updated already...?

[Tanner]

There will be some vacuum but if the oil cap comes off relatively easy then the PCV is most likely okay.

[betyouaint]

There will be some vacuum but if the oil cap comes off relatively easy then the PCV is most likely okay.

What about the engine almost stalling when the cap is removed? Is that normal...?

[Tanner]

Yes because removing the oil cap introduces one big pressure leak.

[Hugh@EuropaParts]

Thanks... is it possible the dealer installed the incorrect one when they changed it a year ago?

How would I check...?

Might that be the problem?

No, the late vin has an extra port so I doubt they would install the "wrong" one.

If you want to PM me your vin I can see which one you need for your vehicle.

[Charles.waite]

The part number on the PCV is underneath, you pretty much have to remove it, unless you can wendge your cellphone camera under there and manage to get a clear pic. Its basically in the same place as those markings on the top, but on the bottom. Brilliant decision on Audi's part to put that useful info in the only place you can't read, unless you remove it... [facepalm]

I used to have an 06. I had the PCV updated by the dealer as well. Now that I have an 08 with the newer gen PCV I can confirm they are pretty much identical from the outside, so you need to remove it to read the part number unfortunately.

[betyouaint]

Here's a photo of the rear vent pipe above the turbo. From what I can tell the PN is maybe 060103215A...? Would that be the correct one for the newer PCV...?

http://www.legoheads.com/rearPCV.jpg

Seems now I have bigger fish to fry due to zero power - see my thread "Turbo Whistle Paranoia"... :(