Audi VW A4 2.0T Bad PCV Diagnosis and Replacement DIY (How to Replace) 06F129101P
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- Опубликовано: 25 авг 2024
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Do you hear a howling or squealing coming from your 2.0T Audi or Volkswagen engine? It might sound like a squealing belt that is constant and won't go away. You may also see multiple misfire codes even though your coil packs and spark plugs were just replaced! The bad PCV can cause multiple engine codes, multiple misfires and the squealing noise. In this video I go over the quick and easy way to diagnose a failed PCV valve by removing the oil cap with the car running to see how much suction is present in the crank case. If the cap is difficult to move with a strong suction noise, it is time to replace the PCV. The factory VW/Audi part number is 06F129101P.
Upon replacing the PCV for this #2.0T FSI TFSI engine, 5 of the engine codes cleared on their own without the need to erase them via the OBDII port with a diagnostic scan tool. The engine sounds much healthier and the car is running much better with more power than before. It is amazing what a small $49 part can do to cause issues with these motors. #A4Avant #AudiA4
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0:35 irregular idle when you remove the cap or an oil dipstick is a sign of a WORKING PCV valve. If you remove the cap and the engine work doesnt change, it means that the valve issint working and needs to be replaced.
Thanks for this. I just bought a car that was doing this so I swapped the valve and its so much better. Just hope I've caught it in time. Don't know how long previous owner was driving like it was. No engine lights were on.
The first video on youtube shows how to unlock correctly the lower pcv hose! Thank you!!
I have a B8 A4 and it was sucking air when I removed the oil cap off with the engine running, so I thought that the PCV valve was bad and I bought a new one and got it installed, so everything seems to be fine but it’s doing the same thing and it seems like is sucking even more air and the car idles a rough when I take the oil cap off, so I don’t know if this is actually normal or not
@@samwh4775 same problem here. Had a lot of suction, changed PCV but the suction problem is still there. So I don't know what's the problem.
Thanks for the walk-through and the easy method of testing! I'll be replacing the PCV valve & hoses in my sister's 2008 A4 tomorrow (along with an oil & filter change). Check engine light is on with P0171 and P0507 codes. I'll report back.
sounds good! please do report back. thank you
@@BIMMERZEITT I struggled more than I should have in taking off the secondary hose, but otherwise, the replacement went well. Cleared the check-engine codes and they haven't come back so far (fingers crossed that they don't, ever). Cheers.
PFPTSMADDC nice work! 👍🏻
@@47818 I have the P0171 and P0507 now. did your change fix it?
The p0171 code is from a faulty purge solanoid. Easy and even cheaper fix. This video was very helpful too
Genuine solenoids are bot cheap. Don't be cheap on a lifetime part
@@mayfieldd357 aww shit. Okay. Thanks for the heads up you know anywhere I can get oem parts?
@NOAHPOINT5 ! Deutsche auto parts, and if you have a good mechanic, they will order it for you. O Reilly isn't bad either. They order parts, too. Just never trust audi to fix your audi if it's not new. lmao 🤣
@@NOAHPOINT5 I actually had mine replaced 2 weeks ago
@@mayfieldd357 that's true 😂 thanks man
I didn’t know your from ct I’m from Waterbury and when I get home I’m trying to do this!!!! Got my subscription.
Hey CT crew! Good luck man
I have a ton of codes p299,p2400,p0243,p0444,p2295,p0089 .....so I have a ton of work to do 😂😂
Sunnof a biscuit!! No time for black nitrile gloves... Been diagnosing for days... Thanks for this. Going to fix it right NOW!!!!!!!
ADD P0300 , P0301 , P0302 , P0303 , P0304 Miss Fire Codes to your description or tags for potential cause.
thanks for the video
Dude this looks very promising, ill report back once ive changed the pcv
any update?
@@BIMMERZEITT i ended up not doing it... my hpfp just got louder for some reason, the piston is still fine.
@@BIMMERZEITT Yeha this does look promising, I'm gonna do it today or tomorrow and let you know
Thank you mate 🎉👍
Cheers.
@ 3:25 HAW! Thanks for the laugh. And thanks for a great instructional vid too...was very helpful.
Beautiful bastard, thank you so much for this 😘
Hows it holding up
gonna change mine this month sick of the CEL and the high start up idle RPMS
Very helpful video brother, thanks
cheers
I hate those PCV valves. In 4 years I will be replacing it for the 4th time. And I don't know if its coincidence or not, but they are failing just after I do something with the engine. At first it failed on the long journey. I replaced it wit OEM VAG one and it went fine. After like 6 months I replaced timing belt with tensioner and after startup I noticed rough Idle/misfire. I spent a whole day searching what did I wrong with timing belt replacement, but did not find anything. Then I took the car on the road and noticed idle jumping from 900 to 2000rpm, then I knew that PCV valve gone again as it was the same symptom I had earlier. I decided no to buy OEM, but bought Vaico PCV. Then after 1 year I decided to install Ramair induction kit. After installing it, I start the car aaaand rough idle... After 1 year, just now I replaced cam timing chain and tensioner. And guess what... Rough idle again. The engine ran completely fine before the works. I didn't put hand on it, just disconnected the plastic hose from it. Thinking about installing oil catch can and get rid of that shit... My engine EA113 2.0 147kw
Did you know how to test a bad cover valve for audi a4 b7. Because I dont know if I have a bad pcv valve or the cover valve.
the two tests that you did, its to know if the pcv valve is bad? I got mixed up when you said valve on your first try.

after replasing part it still has some underpressure and still affects running when opening oil plug?
Should I change the PCV valve and gasket of my 2013 Audi A5 Premium Plus BEFORE I get an Engine sign in the Dash?
Mine has 54,000 miles !
I need help please!
After replacing PCV I still have the same amount(maybe more) of vacuum suction when I open the oil cap off.
What should I check next?
George I got the same problem,how did you fixed?
@@romero10374 to be honest I haven't fixed yet. Some people say that's normal but I don't think so.
I also had some wobble limp idle but this I've solved by replacing the Camshaft Adjuster Magnet
@@backtonatureitis thank you for your response
Nicky done!
Thank you, sir!
Does PCV valve problem cause misfire and have got leak oil between piston head and spark plug on combustion chamber?
Alright thanks for the info.
Hey mine was doing the same thing but when I replaced it it is still doing it. It's a multi misfire only at idle otherwise it runs good. Now when I remove the oil filler cap it does not suck back in but it still has that minor misfire only idle
Very informative video, I have Audi 2009 a4 turbo, when I open engine cover blow smoke come from inside , please advise me? Thanks
you mean the oil cap? that is relatively normal to see oil vapor
Thank you very much.
Is that for the CCTA motor? If it is, where did you get it for that cheap? Audi here just quoted me around $400 with tax!
Hello! Can I lose boost if PCV is bad? I tested yesterday blowing presurizes air into intake circuit, and it was escaping through oil dipstick.
Yes Pcv valve will decrease power and cause oil burning
Awesome video very informative. Did you have a CEL as well or did you just change it because of the vacuum suction? I have vacuum suction as well but not as bad as in the video. Planning to do my coils and spark plugs, so wondering if it worth replacing PCV or leave it for later.
Yes I had misfire codes. Replace the PCV first, it is cheaper and easier to do than coil packs.
@@BIMMERZEITT Thanks for the reply mate. Following!
Great video !!!
Hello have an issue with mu A4 2008 when running at 70mph engine lights comes on and runs rought/ also early morning starts engine is rought on idle .. Replace cam position sensor /Map sensor.. still thesame thing.. Can this PCV valve be the isaue??? Please advise.. Thanks on advance
So I’ve never owned a Audi before but I have a 2010 2.0 I replaced the spark plugs and coil pack and my idle seems to sound still a bit rough, wondering if I could pm you the video and have your opinion if it’s the PCV or possibly idler pulleys ? Let me know either way very good video thank you
If the idle is rough it’s most likely carbon buildup on intake valves
Where did you buy the new PCV?
Did oil come out of your dipstick ?
My 2016 A6 has this issue. I found oil in the spark plug well for cylinder 4 and the oil fill cap is hard to take off.
Yep super common. Bad valve probably damaged the valve cover gasket. Replace valve and the gasket, some fresh plugs and you’re hood to go. Probably $100 DIY
Wish I saw this before I let my mom spend 800 for a dealer to do this. I guess the diagnosis is built into that price
😂😂😂 yea man you can save about 60-70% in labour if you do most things yourself
Dang, My engine has a horrible vacuum in the crankcase, but I removed the intake manifold removed the carbon and added 4 new injectors. Might be the pcv valve after all. OOPS
Same… coils plugs and injectors… doing the pcv as soon as it’s delivered
I have a 2007 a4 avant 2.0t and this same problem happened to me a few years ago. I got to your channel because mechanics says oil consumption is linked to bad pcv valves. Unfortunately my car is consuming oil again.
dhcivic27 change your pcv again since they fail often. Spend the $50 first. Could also be turbo burning oil or the engine rings are worn, I think these engines wear prematurely that is also common.
@@BIMMERZEITTThe oil rings gets clogged, Audi selected a horrible spring type oil ring, instead of using waffle type control ring.
Can I just replace the gasket and keep the same pcv?
I mean the kit on Amazon for everything is only $40…
I bought and audi a4 2006 quattro 2.0T for 2500$ they told me the turbo was damaged, and on the part you just removed, it had a screw on the hose
Legend
What is the name of the hose?
How come the acorns could get in that deep area. It's covered with hood, engine cover, and all the metal/rubber/plastic parts surrounding it. -_- ??????????? .Thanks for the video!!!
Rodents
wow this is quite an informative video! Just ordered the stuff hopefully it work out! Code just states a slight leak but the sooner the better!
thanks bud, report back here and let us all know if this resolved your issue
@@BIMMERZEITT Yup, I also replaced the purge valve while at it and my car runs a lot smoother at 76k miles!
Another way to test is to blow into the pipe that you broke, there is a check valve in that port on the PCV and you should not be able to blow through it. :)
If it's okay, you can not blow through it ?
@@alimjafari5624 Yeah it's a one-way check valve, if you can't blow through it - means it is working
Thanks very helpful, made me go get the part and replaced it almost right away and problem is solved
Did you ever have a minor misfire only at idle? That's what I'm having and I did the PCV after the oil cap was sucking in and it still has the minor misfire but the oil cap is no longer sucking in when I open it. I'm used to misfires on vehicles affecting the entire RPM range not only idle
No but now that i fixed the pcv, im having a code for small vacuum leak. I replace the n80 valve but the code came back! Ill have to go looking at the whole system to see if i dont have a broken hose or something
Damn bro that sucks. Well I just let my warm up and give it a little RPMs and it actually seems better so I don't know maybe it was having everything open out in the air and then starting it up for a second. I guess we'll see but I hear a lot of them seem to have low RPM misfires that don't really translate into driving issues. This is my first Audi I come from a supercharged Hemi and then old Rover V8 Discovery 2 lol but I love this car I got it from the auction dirt cheap and it's an amazing condition. Yeah let me know what yours turns out to be
Does anyone know why vaccum in a crank case would cause rough idle? Im trying to learn how the PCV works but cant relate a misfire to crank case pressure.
Air fuel ratio ch langes
I just bought a brand new pcv valve and installed it and now its making that vacum noise. I think i got a faulty pcb
I’ve seen that many times, easy to get a defective one. Make sure it’s a good brand.
@@BIMMERZEITT turns out my dipstick was broken and wasn't sealing right. I changed it and it's fixed. I've never owned a turbo charged 4 cylinder German car and didn't realize how delicate these cars are. I've never even heard of a check engine light coming on cause of dipstick. I changed the pcv valve, purge solenoid and the the check valve for pcv system. It's all original brand from the dealer. Changed all 3 parts and don't even think I needed to. But oh well at least I know I'm set for my pcv system for awhile and I learned a lot about my car. I'm a Chevy guy so I'm used to working on standard American cars.. those cars are mechanic friendly. Not these German cars. You really have to know what you're doing to work on these. Thanks for the video man.
Most if I don’t say all Audi have the same PRB PCV valve. Oil consumption or piston . Misfiring. Etc….
In your situation it’s easy to replace that.
Cheek the new Audi Q7 it like you have to remove all the engine. I like Audi but because of oil consumption, and Audi they don’t care about fixing the PRB, I’m stepping down no more Audi
It’s ment to have a vacuum in the rocker cover!
Will this cause low oil pressure
Yes can do
Possibly safety torx
Can a bad pcv cause the car to stall at first start?
Yeah it’s possible, it causes a lot of misfiring and poor running. Couldn’t hurt to replace it for what, $20
Could a bad pcl valve cause the car to not start?
I don’t think so
Weird, I did this with the same part number OEM parts on an '08 and it didn't change anything.
did you change all of the hoses? the pcv system on this is the hoses and also integrated into the valve cover.
Could be the wrong pcv, I have same engine in an 07 and read that the newer r variant dose not work and that I need the older n variant, going to try it myself and see if audi net had the answer on there forum. 😉
Can this cause a misfire?
Michael Baez yes definitely but do you have more than one? Multiple misfires usually come with a bad PCV. If just one cylinder likely a bad coil and plug.
Hi I have audi A4 and misfires only in the morning or when the car has been standing for a few hours, than il have to switch off and than on, drive for a while than all is fine
That must be a B7.5. My 2009 early build B8 sure does not look like this.
I replaced my pcv yesterday, and when I pull out a dipstick engine starts shaking and idling rough. Is that normal or the pcv I bought is bad? It's A3 2.0 TFSI 2006
Yes that is normal. They all do it
truth in failure. these designs are overly complicated and made to fail at 50k miles . i just keep the OBD scanner in my car all the time so I can scan it monthly because every month the light comes on.
oh yes. well apparently the cars are sold at break-even or a small loss. the profits are made entirely at the service department.
Why not just replace the diaphragm? Much cheaper and widely available.
I don’t believe so... the lines can be brittle too. If you have time and can find just the diaphragm then yes maybe worth a shot. Do you have a part number for it?
@@BIMMERZEITT I haven't done this, yet. Don't have an oem #, but aftermarket is Dorman 917-064.
Now that I have done it:
Pros: easy to snap off and on. Available at the 'zone for $31+tax a mile from my house.
Cons: Not OEM. Doesn't replace anything else on a part old enough to have failed somewhere.
By the looks omy old diaphragm, it wasn't original. In fact, I can't even see where it failed. So I'll trust the rest unit to last a reasonable time for my A4 with 133k.
Its not just the diagram that goes. There a non return valve in there as well that fails.
@@bridgeandtunneled That's a very good point. Just because full disclosure is most helpful, I'll briefly explain my situation. I replaced the diaphragm, but with 45 minutes of driving got another CEL which turned out to be a lean code. At that point I replaced the whole oil separator/breather unit. Still got the lean code. Since it wasn't missing or otherwise making me thing it was a fuel problem at one cylinder, it must have been a vacuum leak somewhere. When I couldn't track it down, I fear the rear main seal was the culprit. That turned out to be the problem. The lesson here is that if you have a PCV problem, replace it ASAP. A poorly working PCV will put stress on the rear main seal.
Gloves to prevent cancer lmao!!!
L
Calls it extreme pressure and demonstrates extreme vacuum.
mmkay.
I'm afraid the genuine VW/Audi PCV Valve is no longer $49. Since we have to support Zalenskyy's bank account in Ukraine the price for such part (and everything else) is around $85-$90! Should of bought it 3 years ago when I had the good chance.