7 years after this video came out and it came in clutch. Easy diagnosis with this info and so glad it’s not my intake manifold gasket.

Thank you so much!!!!! I went through several videos that claimed to be diagnostic, but really weren't. You just clearly answered everything I was trying to figure out... Plus the added bonus of connecting my sudden oil leak. Wish I'd known that sooner. Time to get to checking my PCV!

Wow 8 years later and this is very very useful thanks brother

I have been troubleshooting multiple error codes for at least a year to the point where I either wanted to catch our Tiguan on fire or put a Free sign on it. The PCB valve fixed it all! My wife treats me like a hero. I could just give you a huge hug man. Thank you for such great instructional videos.

Great video Humble as always. A week or so ago my 2013 gti started idle revving. It would go up to over 2k rpm at stops a couple times before returning to normal. (750 rpm or so) Seeing this video and others forum posts on this problem made me think the pvc was the likely problem. Turns out my local auto store carries just the diaphragm hockey puck sized part of the pvc. So with a little work i snapped out the old and just like you mention, the diaphragm was torn. Put in the replacement and its back to normal. thanks again for your vids.

Thank you so much for the video. It saved me from going after an O2 sensor and saved my wife a lot of money. The diaphram had a torn gasket. Luckily a local part store had the Dorman part for $30. Quick and easy fix along with cheap. Thanks a ton!!

Great guidance, thanks :-) My SEAT had a hunting idle, 'too lean' codes, and a wheezy air sound after engine off. The PCV looked a bit different, but I was able to carefully prise it apart, and voila a ripped diaphragm!

Great Video exactly the issues I was having on my Audi B8 2.0 Turbo. Replaced and runs like new. I had been using oil as you mentioned as well. Thank you Kindly !

+HumbleMechanic .. I just replaced it this morning. Car started doing a loud screeching noise two days ago. After checking your videos and diagnosing the problem, I ordered the part from Deutsche and replaced it myself. Very easy DYI and fix. Thank you for all the help you provide to us VW owners. (we really need it, lmao).

Thank you Humble Mechanic! Helped today so much in fixing my PCV valve and thanks for including how to test it.

You are by far my favorite mechanic on KZfaq bro

Im here again my friend. I been working on my 2007 2.0 T FSI And everytime its a new code.since i did the valve replacment crazy but its truth I dont know the reasons but im tired to spend a tons of time on this car . The goods its you are there to show me posibles causes and how to fix the problem. Tks my friend for this videos Keep doing it .

You really saved me towing money and expensive no use mechanics ,who have been claiming that the sound comes from a faulty pulley or a worn fan-belt. Thanks so much...

Huge, huge help. My 2010 CC had been giving me the Cylinder 3 Misfire code several months ago. I assumed it was the notorious carbon buildup and not being ready to drop the cash for repair decided to experiment with a can of Seafoam. Problem solved, no codes for 3 months! A week ago my car died while backing out of the drive one morning. No code; effortless restart. ??? A few days ago I was hit with the P2187 code and a very erratic idle. Your mention of the whistling noise struck a note with me; I'd heard that sound off and on for about a month, always at idle after highway driving. It seems you have perfectly described my issue. Parts are ordered. Thanks for saving me a lot of money at the shop.

Great Video? Do you know if there is much difference between this and the 1.4L TSI engine? I have a VW Golf V GT TSI 170. Which has a faulty PCV vavle however I cant seem to find a video on it.

hey thanks for all your videos. I was just wondering if a bad pcv would cause my 2008 tsi to bog down or stall if i remove the dip stick. I just replaced the rear main seal and the pcv valve 6 months ago.

This video was great as its given me the confidence to tackle the PCV replacememnt myself. Perth Australia

This guy is awesome thanks so much. I’ve been searching for hours and this is exactly what my problem was. It fixed it right away

I had a question I am hoping you can help me with. I have a 2010 Audi A4 with the TFSI engine. If my PCV is failing or going bad, how long could I safely drive? I would intend to replace it asap but unfortunately I am in a position where I wouldn't be able to immediately. Would going 100-200 miles be detrimental to the engine?

Bro you're the MAN! Cant thank you enough! My 2011 has been in and out of 2 different shops 5 times and a total of 680$ later only to have to diagnose it myself...and it was the pcv valve! Seriously thank you again I can finally SHUT THIS WHISTLE OFF! My car literally sounds like a JETSONS car

+HumbleMechanic I am looking to DIY this on my 2010 GTI, per your recommendation. Any idea if the generic OEMs (e.g. Vaico) are as good as the genuine VW part for this PCV valve (06H-103-495-AC)? Thanks so much - your videos are excellent!

Hey Charles. Thanks for your videos. I have a question concerning the operation of the pcv system on the 2.0 Tfsi (BWA). If I disconnect the hose that goes to the intake manifold, should it still be vacuum in the crankcase (suction from the rear port that goes to the turbo inlet)?? If I do so on my car, I get a slight overpressure in the crankcase (I can feel it when I open the oil cap). So, I'm not sure if the crankcase vents properly when on boost... The car runs perfect, and I just complain about the oil consumption after 200.000km. Stock Pcv membrane broke at about 80.000km some years ago and I feel that oil consumption has increased since then with the new pcv. Running on 5w30 by the way. Maybe it's time to switch for a 5w40. Greetings from Catalonia.

Thanks for posting, it helped me. My 2009 Passat engine (1.8 TSI BZB) was shaking badly in the morning after a very cold night outside and had misfire error codes. In the end, the PVC was ok, but the crankshaft seal to the gearbox was leaking. I think the PVC froze and built up pressure. I replaced the PCV and the sealing ring as well as the clutch (reinforced version) at the same time (yes, the gearbox had to come out of course, grrr). Now the engine is running better than before. Best regards from southern Germany

My 2012 GTI had surging idle just last weekend. I am pretty sure it had a highway speed (60mph) misfire for a month or so, engine check light came on Sunday,got it repaired and new valve fitted next day. 58,000 miles. Warranty covered full cost, running much better now.

Thanks for the video. Definitely looks like a DIY replacement. I did however want to make sure I don't change mine unnecessarily. Would you always hear a whistling noise? Or for just some type failures? I suspect mine may be bad, but I don't hear a noise. I do have a leaking seal. Can a bad PCV cause a car to stall? My 2008 Passat LUX (2.0 TSI) with 173,000 miles will run for a bout 15 to 20 minutes and then stall. Once stalled, it will only run for a few minutes at a time. Originally, it would not even crank until it sat for 45+ minutes. I have replaced the fuel filter (definitely needed it), and now it will crank almost immediately, but not run for long. The feedback I've seen would indicate to next look at the Control Module for the in tank pump. Next would be the in tank pump and / or the high pressure pump. I did see someone mention that the PCV valve caused their passat to stall - not sure if that was unique or common.

Is it true, that if you take off your intake to do a carbon cleaning, and the carbon build up is moist and oily, that's a sign of a bad PVC? Recently read this somewhere, but I can't it again.

Thanks for this video, it made me focus away from a suspected leaky turbo shaft. I found a fourth way the valve can fail; mine had significant carbon build-up on the diaphram and seat. After cleaning everything is back to normal.

Hi Humble I have a bad PCV Valve on my MK6. What is your recommendation replacement the Valve or put a catch can kit and eliminate the OEM PCV Valve..??? Thank you.

great video. I have a p0301 code that re-occurs. changed coil packs, but code reappears. Also under heavy acceleration, the rpm's go nuts. rev high, rev low. then returns to normal. Any ideas?

Thanks . Clear explanation , i believe mine has falled . 2015 jetta 1.8t 42,000 miles . Small valve cover leak.

This series has been a life saver, thank you!

Hey Charles, changed my PCV on my 2.0 TSI Scirocco tonight. I'd let the engine cool for a couple hours, I noticed the alloy rocker cover was still hot, the bolts weren't too difficult to undo, but noticed some fine metal slithers on some of the bolts, some of which didnt seem to nip up so well on re-assembly. I think I've stripped some of the threads, easy to repair?

You mentioned that one of these going bad can cause oil leaks in other areas like the main seal. Once corrected does this help with those leaks or once they start you need to address those as well?

Hey man keep up the good work!! I discovered your channel a month ago, and I'm hooked! I'm also a vw guy!

Need some advice I have a 2011 CC and I'm pulling misfires and codes P12A2 and P2187 do you think this could be related to pcv valve . Car idles rough in morning upon cold start .

WOW!! I need to thank you so much for this video, it saved my ass. I had NO clue why my 09 Jetta Wolfsburg was screaming at me (squealing so loud), I assumed a pulley or something belt related, never heard such a consistent squealing before. We than got a bunch of misfire error codes and P0507 which lead us to you. The car has been misfiring for over a year and no dealership or shop has been able to figure out why, I kept following the symptoms and replacing coil packs. Finally a shop told me "MAYBE" it's a dirty fuel injector which is a bigger fix on the wolfsburg because you have to take apart the engine more than most other cars. Instead of going down that route we started running fuel injector cleaner at every fill up for months, it seemed to help but the car still had misfires while starting up. We were driving around and the car seemed to be driving fine than out of thin air started the loudest squeal ever, of course we were downtown and everyone was looking at us like we were idiots. Long story short the only way I was sure of the problem was by watching your video and I found the diaphragm under the pcv valve cap/cover was torn just like you said they do. The PCV valve was also very built up with hydrocarbons and oil but I cleaned it out nicely. Now I'm looking for a replacement for the cap and diaphragm. I followed forums and people are recommending the "Dorman 917-064 PCV Diaphragm Repair Kit for Volkswagen" which you can get on amazon for less than $20. Hopefully that will come soon, car is out of service until than.

Great video! I had a Volvo V70 which caused main seal leak, with no codes when PCV went bad. $700 to repair, ouch! I have a 2009 Passat which should be a lot less expensive (if I get a code) and especially since I can replace myself. Have you done a rear main seal replacement video? Thanks.

Where is the PCV valve located on a 2014 TDI 2.0 ? Thanks for any info thank you so much

Love your show.. I'm having a weird oveboost between 3-4k followed by misfires on a TSI + K04. Upper RPM range the car is perfect. I've checked all the hoses and no boostleak. Could the PCV be causing this.

@HumbleMechanic please help me i have a P2096 on my A3 2009 it has a similar engine to the b8 . i have spent a lot on misdiagnoses. bought PCV, hpfp,fuel pump ,cleaned the injectors dont know what do next. kindly help

Nice sign from my Town into the background. Greetings from Wolfsburg =)

Maybe you can answer my question here, My 2007 Gti with the fsi keeps blowing the cap off of the pcv valve. luckily enough I found all of the parts and it is a brand new pcv. Is it most likely a stuck diverter valve or what, any ideas as to where to look would help me. Thank you

Hello Humble Mechanic, thanks for the vid. I have a 2010 Tiguan. I am getting misfire codes from Cylinders 1,2, and 3. No other codes. I do not here air being sucked in to the small relief hole on the valve. However, when I pulled the hose that runs from the PCV to the intake (the hose toward the front of the Tiguan) there was oil dripping from the valve. Not much but a few drips. But slightly wet in the tube as well. Does this point to a bad PCV? In 2016 / 40,000 miles ago, VW replaced the faulty intake and did the carbon clean while it was off. Could carbon already be built up enough to cause the misfires if its not the PCV? Last thing, I moved the coils to different cylinders to see if I would get a code on cylinder 4. But nothing changed, still same codes on cyl 1, 2, and 3. Any ideas?

I put my finger over the weep hole and the pitch of the whistling changed. Any pressure applied to the cover the PCV caused the car to nearly stall. Bought the PCV, swapped it out. All is good. 45 minute job start to finish. Thank you for the great video, it saved me some $

Excellent video and information. Mine just failed. Good thing I have a second vehicle while parts come in. Def a DIY part specially if you are a little bit mechanically inclined. Save the doh!

I was thinking of getting a PCV delete for my gti mk5. I’m not too knowledgeable with them, what are the benefits for them and how are they different from oem? Are catch cans beneficial?

Hey Charles, Hope your doing well, what about PCV fail symptoms on the 3.6 VR6 ?, i see oil gunk on the edge of the cylinder head cover and a very subtle idle change on my 2013 Passat. Thanks in advance, take care

I seem to have an oil leak near the turbo. There's quite a bit of oil residue build up on the turbo muffler, even some oil. Could this be from a bad pcv valve? I've replaced it fairly recently, and there is no check engine light or fault code being thrown. There is also oil vapor leaking out and condensing on and around the oil filler cap.

Can you do a vid on the fuel pump control module ?? Thanks in advance buddy!

I have a bad pcv valve is it good to had the oil catch can or I have to replace it too as well

Hi Charles, Does the Mk4 TDI have a PCV valve ? I've replaced my turbo for OEM part but still having puffs of smoke on acceleration. Checked the Inlet hoses and the intercooler and there's a lot of oil in them. Any ideas. Thank you

Question, I just took my 2011 GTI to the dealer for oil leaks. The diagnosis was that the rear main seal is leaking bad, but also noted was the turbo recirculation valve and inlet tube was seeping oil, possible failure of turbo seals...which is more expensive to fix than the rear main seal. My question is, if there were no check engine lights or anything on at the time, would there be any way to actually know if the PCV valve might have caused some of this? I did have some idling issues back in the summer to where it would idle rough on a cold start and was enough to get the check engine light to come on for a cylinder #3 misfire. I thought maybe due to me not using good gas, so started using 93 and a can of sea foam and the light went off and car has run fine ever since.

2012 GTi DSG just got Stratified Stage 2 tune now I got 2 code. Arm downpipe and Unitronic cold air intake. Been on cobb stage 2 for the longest while no problem until Stratified tune. P2187 and P050A

would you recommend a catch can to help with this?

Would you recommend a pcv block off plate to avoid all these wear and tear problems. I have an Audi a4 2008 and I have a block off plate but know I have some oil in the turbo pipe near the bottom of engine

Love the show, lots of info!! Had my intake tube off the throttle body and noticed a lot of water pooled in the ribs. Could the PCV be failing causing that or is that something else? 2012 CC 2.0 TSI

I have a ‘13 GTI, I put on a Forge DV relocation kit awhile ago. I recently just got my car back from the dealership, long story short, can an aftermarket piece like this trip a check engine light?

Thanx for the video . I have a golf mk5 1.4 tsi with 200 hp and i was thinking that the chain timing was of because it idle so weird. But the pcv valse was broken so that saved me al lot of work.

Been fighting a cyl 2 misfire. Not the plugs or coils so am pretty much at the point of replacing my pcv. Slight whistle that stops when I cover the hole but it seems to be sucking air into the hole should it be blowing out if it’s failed?

Good video I was wondering if it could cause a p0068 code many thanks

Dude I have watch most of all your videos good luck to you and and yours stay in touch love you bro Volkswagen yeah!!!!!!!!!!

I have had a reccuring p0171 on my passat b6 2.0 TFSI. Changed the PCV and break booster hose. Also changed sparkplugs and ignition coils, not because of this problem but because it was planned. Still having problems with p0171, now worse than ever before. The engine is reving up by itself when in idle.. Any good ideas would be appreciated!

thanks and great video! Would a failing PCV on a 2.0 TSi cause oil consumption? I just had to add 2 quarts of oil in under 2k miles since my last oil change.

Would a failing pcv cause smoke coming from the exhaust? Especially on start up. I just trying to diagnose my Jetta Gli right now. Old turbo blew up so I replaced jt with a is38. Trying to figure out if it’s the pcv or just a lot of oil that leaked into my charge pipes and intercooler when the turbo broke.

Hey man, Thanks for the info. I have an 07 Audi A4 2.0 T and I'm getting some what looks to be black smoke, as well as some hesitation. My check engine light is on and I can't pass inspection without it off obviously. The car has 68k miles on it and I don't beat on it. I think because of the codes it was throwing back on the OBDII that my PCV valve might need replacement. My question is 1.) do you think that could be the case? 2.) Do you recommend any replacement videos for a DIY job on that engine? I'm fairly handy and have done a lot of work on my cars in the past but this is just something I can't afford to take to a dealership right now. Thanks dude. Anthony

Hi there. I have a b8 a4 turbo tfsi engine. I bought it almost a month ago. I had it for the first week and it used 2 ltrs of oil in 360 k's or 220 miles so pretty bad. Just been in touch with the dealership today who has been really helpful told me they have done the pcv and main seal and software update. How successful is this stage one fix? I'm not to confident with the amount of oil it was using. Is this likely to fix it? Thanks.

Hey bro I got a question about the rear pcv hose on the 2.0 fsi I got a bag recirculating catch can and in three months with it I haven't collect any oil on it so I have an oil leak on that hose and I was wondering what if I remove the check valve on that hose?

Got a "system lean at idle" code yesterday in my wife's 2013 tiguan. I suspected a vacuum leak. On inspection I took the engine cover off. I found that hole on the side of the PCV valve to be sucking in a bunch of air like you mentioned. I'll try the Diaphragm repair kit and see how it goes. Thanks!

Hi can you show where's the pcv valve location for vw golf 2.3 v5?

Hi, a failed pcv valve can cause high consumption of oil and carbon by exhaust on cold start?

Hello, after upgrading to an Integrated Engineering cold air intake I get the whistle would that be a bad PCV problem no codes are thrown off. Never had the whistle before. 2014 VW CC 2.0

I saw 2 different pcv one with 1 orange vakge and another with 2 orange valve, is like an upgrade? You know witch one is the best?both fit

+Humblemechanic, I have a 09 Passat with 75000 miles that is leaking oil from the rear engine seal. I noticed that you said that the PCV valve can cause oil leaks from this area, but would it cause oil leaks elsewhere too? My calve cover is starting to "seep" from the edges and my timing cover is also leaking on the bottom. The majority of the oil is coming from the rear main seal. I just recently put it on a lift and started her up. About 5 min in I could see it starting to seep from the drain hole at the bottom of the flywheel housing. After about 15 min I was starting to actually drip oil. I did replace just my diaphragm to the PCV valve, but I didn't see anything wrong with it when I tested it as you recommended. Should I take that part back and buy an actual VW part, or give the generic brand a chance. This is the first time that I have replaced that part, and all of my maintenance has been done through the dealership. Thanks

I might have a faulty PCV on my 2013 GTI, but I'm not sure. When idling sometimes I can feel the engine 'stumble' like it miss-fired. There is no change to the rpm on the tachometer, I simply feel these 'stumbles' every few seconds. The dealer did a 'scan' on the engine, but reported "no codes stored". They also told me that VW engines normally idle a bit rough because they are designed for high performance. But I think maybe they are just giving me the run-around because the car is still under warranty. If there are 'no codes stored' does that mean there is no problem? Or should I take it back to the dealer and ask them to test the PCV?

Hi HumbleMechanic, would this cause misfire under load? My Mk7 GTI would throw epc light and misfiring cyl4 and hide cylinder above 5000rpm. I checked and replaced coils and plugs but the problem still persists.

Just wondering if there has been any later revisions to the OEM PCV for the MK6 (I know the mk7 GTI seems to have an updated one...). I replaced mine back in 2016/2017, but do experience extreme smoking in autocross if I have to brake hard then turn hard left then accelerate out of a corner. So based on what I've read I probably need to add a catchcan in line too (want to keep it class legal...)

im getting a small amount of oil on my air sensor that goes in the intake manifold and causes my epc light to come on . is that a bad valve

I've got a S8 v10. Can't find the pcv tube at resonable prices. Ive not seen cool kits like the more mundane engines. Is there any similar looking tube I could buy in a roll and use to make some ?

hi there I have a 2010 VW GTI and I get engine light often it go's and come back when I checked the code I found P2187 System Too Lean at Idle: bank 1 ( I was wondering probably need replacement for PCV Valve Please advise ?

A great video ! Is it please possible to switch the pcv valve to a oil catch can?

Many thanks Humble mechanic ,i just subscribed . Any one know what would happen if you delete diagram ie (strip out) ect , vent to atmosphere , and cap off intake of pipe on turbo elbow ? But i think that would be an MOT fail here in the UK .

I need help I’m lost and because of this I I mite sell my 2014 vw cc that I got 8 months ago and because of this problem I’m having I haven’t drove it much so Recently about two weeks ago I was fixing a cut wire I cut on accident while trying to change the water pump so I fixed that but I’ve got a loud engine bay it’s louder and there a tick which I can here from the pvc that you said in this video also I’m getting a Cylinder two miss fire so would it be this or coils packs as when I get close to the pvc I can here it tick and it’s kinda loud and when I put my finger over that little hole it wants to die

Any hints about the front PVC on the VW B6 2.0 TSI?

@HumbleMechanic given that a 2020 tiquan or vw uses the 2.0t tsi, is there a difference in engine compared to the Audi 2020 q3 2.0t tfsi? I’m not sure what the main differences are engine wise. Can you please provide a quick explanation? No one seems to know ! Thanks in advance

Hey have ? Please answer need help have 2005.5 audi 2.0t b7 and I added pcv delete kit from rkx but was told i can just have it by itself that supposed run catch can with it but the plate i bought doesnt have adapters i run liquid molly 540 ??

My golf mk6 CAXA 1.4 TSI started to whistle a week ago, i had misfire code only once....is it same procedure to replace as on 2.0 TSI?

Is there a downside (other than not being an OEM part) to replacing the PCV with a catch can kit?

Hi how r u doing today just got a 2013 audi allroad . I notice that every 150 miles r so I have to add a quart of oil do u have any answers for that problem

Do oil leak from the rear breather hose and into the air intake pipe is also due to a bad PCV valve?

My EA888 2.0 TSI gen 1 started to leak oil on spots such as the air intake and discharge pipes, which were often found wet. They diagnosed it at the dealer's shop as a faulty/worn turbo. Turbo was changed (upgraded to a K04, actually) but the wet intake and discharge pipes persisted, could this PCV valve be the issue?

First of all, you are a legend! 2. Is it possible to replace the only the rubber diaphram? mine is sucking a little amount of air so I suspect the rubber is starting to fail? 3. Is itpossible to open the valve on top and inspect the rubber diaphram without totally recking the part?

Just came across this today. Would this cause a tapping sound when it fails? My sons coil pack went out and now it taps between the #3 and #4 cylinder, right where this sits on his cc. We changed the plugs when we put in the new coil pack. The lobes on the camshaft are in perfect condition no marring or scoring. I can feel the impacts on the black plastic more than the valve cover. Any ideas?

Hi charles, can you make a video about the pcv revisi0ns. Does it need a ecm flash if you are changing from black top to white top pcv.

It's possible make the engine run properly without the PCV or even the Valve Cover installed. You just need to Disconnect the MAF sensor and Start the engine.

Hey Charles would a pcv vale cause decent oil consumption? I have a 2015 Tiguan that is burning oil that is mostly seen on cold stat ups (32 f and colder)? Other than that there are no codes and the car runs fine . I had 1 code 3.mths ago for a o/2 sensor that I cleared but never came back.its burning a 1/2 liter a week.

Hi, Smoke from exhaust on boost can cause of bad PVC ?

good video I think I may have to change mines my car run great no signal lights are mis fires the only problem is my car burn alot of oil I have a 2012 vw eos tsi engine 84k it's like every 600 miles are so I had to add oil the round circle piece u had in your had I do see a lil moisture from there

You are what a KZfaqr should be. Thanks for your help.

Think I may change mine. Have some misfires dancing around cylinders. Already fixed a misfire once with new coil packs. Looked at this last night I see a bit of oil around the outside of the diaphragm. I don't think oil should be getting out of that.

Just wondering on a 2011 GTI 2.0L turbo would a crankshaft position sensor cause the vehicle to through misfire codes and barely idle? A friends kid bought the car with 123,000 miles on it and the other night it just started misfiring and wont idle hardly at all. Should i be looking at replacing the PCV valve and hosing assembly? We did replace the plugs and coil packs and still no change. Should i also check the timing chain tensioner?