6 Symptoms Of A Bad PCV Valve & DIY Fixes

Your PCV valve is an important part of your engine - so if it's not working right, you'll want to know about it. In this video, we cover the six most common bad PCV valve symptoms, and what it might cost you to replace the PCV valve. More info: mechanicbase.com/engine/pcv-v...
Ask Car Questions: community.mechanicbase.com/
Chapters:
00:00 Introduction
00:47 PCV Valve Function
02:43 Location of the PCV Valve
03:57 Bad PCV Valve Symptoms
07:02 Common PCV Valve trouble codes
07:28 PCV Valve replacement cost
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#pcvvalve #badpcvvalve #pcvvalvesymptoms
The information contained on this KZbin channel is for general information purposes only. This video cannot and does not contain automotive advice. The automotive information is provided for general informational and educational purposes only and is not a substitute for professional advice.

[@MechanicBase]

Did you fix your car issues? Let us know in the comments below how you did it, and maybe you can help someone else with a bad PCV valve! Don't forget to like the video and subscribe to our channel! More PCV Valve information: mechanicbase.com/engine/pcv-valve-symptoms/ Website: mechanicbase.com/

[@chrisjones5352]

Hi my breather is blowing out air

[@ramonlv2475]

How can I find the PCV valve in my 2015 Mercedes Benz GLA 250 4 matic

[@spearmintaltoids9889]

I have a quick question, I replaced my PCV valve today and it worked perfectly and fixed my engine problems for about 10minutes but then suddenly my Bronco went straight back into the same sluggish mode that it was in before I replaced it. Why do you think it did this? Should I have replaced where the valve connected to the intake? (1986 Ford Bronco Eddie Bauer 302 EFI)

[@unebonnevie]

Excellent explanation on the the purpose of the PCV! I guarantee that most mechanics wouldn't know this! Mechanics nowadays simply replace parts until the symptoms go away!

[@rondog540]

I had a crack in the PCV hose on my HK Barina that I missed for a couple months - causing an initially very subtle but increasingly rough/high idle that would eventually either stall or get stuck at around at 1.5k rpm and lose acceleration altogether until the engine was switched off and on after a 5s wait. This video was a great help.

[@canelocarranza]

Great video, thank you, you saved me thousands of dollars of unneeded repairs that i was planning but it turned out that my pcv valve was stuck closed and this video was all the only info i needed to figure that out. Thank you

[@tripledelight8104]

PCV Valve on my Honda cost less than 5 bucks, took me less than 5 minutes to replace. I cleaned it with carburetor cleaner offen as I can.

[@RED97761]

Well informative video. I know too much about PCV but your video added even more information to me.

[@sarinsarin7898]

Thankyou for taking the time out to make this video. I do my own maintenance's but for a novice that was very well explained and not complicated to understand bravo sir. 👏👏👏

[@Alfred..E..Neuman]

I love the hand tutorial given with both the left and right hand! 👌🤚🖐️

[@edsonherald3720]

Many Thanks For The Excellent Class ! 👍🏽👍🏽👍🏽

[@jy-no4vq]

I bought a car that was blowing a light white mist through the oil dip stick when I tried to check the oil.(while the car is running/on) Also light oil mist pushing up through the oil cap/oil refill cap when I take it off.(again while the engine is running. I for sure though the piston ring seals/ head gasket was blown (but no white or cloudy oil in dip stick). I bought the vehicle anyways thinking I had to change the motor. It turned out to be just the pcv value was stuck and it was all I had to change for less than $25. Bought the vehicle for $1000. The vehicle is still going for $5-6k. Man I hot lucky.

[@jy-no4vq]

I hope this helps some one out there.

[@Stainless316L]

Should the pcv be closed at idle not venting. ?

[@pattywoo1061]

Great video - very helpful to a complete novice!

[@tamarawarrick8212]

Ty for taking the time out to make this video to educate us❤❤

[@gwendolenmccloud8771]

First, you have a great voice!!! Secondly, thank you so much for posting this video!!

[@kolankprof]

Great overview and diagram! Thanks for the thorough explanation!

[@sollykhan2385]

EXCELLENT tutorial, Thank you, please post more wonderful Videos, 🙂

[@dartmango]

My 2008 Honda crv 2.4l had issues with a lean bank 1 and ran rouph at a stop and fuel mileage was horrible. I found a collapsed PCV hose and changed the hose and PCC valve. The car long and short term fuel trims went back to normal withing 10 percent of each other and fuel mileage improved with smooth idling. If Pcv valve is closed it increases crank case pressures and could cause oil leaks out of the rear crank bearings, oil pan head covers and sludge up your engine. Small part big problems. Check it and make sure it's working properly. And please don't vent to atmosphere. It's better to have engine burn it clean then to pollute air even more. I also had to clean my throttle body because the dirty air clogged everything up. I had just bought this car used and must have been like this for a while. All good now. Thx

[@jodytho]

great video. clear information and instructions

[@MM-oc2pg]

Very helpful.Thank you!

[@carlossp1759]

Well explained

[@johnmcnamara4846]

Thank you. Straight to the point video.

[@MechanicBase]

Thank you🙏

[@user-gb8ih8qo8z]

Thank you for great explanation. Excellent Presentation.

[@MechanicBase]

Glad to help🫡

[@jagathchristopher4103]

Great video, These tips and tricks are very helpful to car owners. Thank you very much.

[@MechanicBase]

Thank you👍

[@tgvoaden]

The best video I have seen re the PCV ,,well done and thanks. on my way to see my local auto electrician, I think the valve is in the rocker box so expensive.

[@peterrudy9207]

I think best to prevent the PCV Valve from getting clogged up . Is to have routine oil changes every 5-6000 miles with a new filter . And to use a detergent based engine flush such as AmsOil or Liqui-Moly each time .

[@MechanicBase]

Yes, doing regular oil changes does help a lot, @peterrudy9207👍👍

[@xxmeanyheadxx]

liqui moly all day engine flush, intake cleaner, ceratec every oil change

[@dvvaughn564]

3500 miles

[@vanessaarcelo3]

Just buy PCV valve, only 8 dollars fix ir not fix the issue atleast you can cross out that part

[@bluesdirt6555]

My intake has to come off ! Just quoted $699.

[@indielol8914]

Thanks to the video and WoW auction house bell nostalgia 😂

[@milkomilev4302]

Hallo verry helpful video .i loking for Mercedes Vito 114 2016 w447

[@abdouallahuniverse5689]

And also the problem could be the pcv valve grommet ( it's bushing), bad grommet will cause vacuum.leak, so you need to change both regularly pcv an its grommet .

[@Plasmo20]

Good video, thankyou. I have a 2005 LEXUS IS200 that my daughter drives. 190,000kms. When cold start in the morning I see a small amount of light grey or white smoke at the exhaust for maybe 7secs only. The engine has begin to use oil, we have added 1L in about 6weeks of daily commuting 50km round trip. I am thinking Valve seals but another suggestion was the PCV on the IS200. Your examples do not match my case however I am interested to get your opinion/guidance. We are in SEQLD, Australia with Summer temps in the 25-35deg C. Naturally I prefer the PCV to be the problem as replacing the valve seals is a harder job than on old cars. Cheers

[@user-pr6rt2vv9b]

Verygood

[@NDBBDB]

@Mechanicbase Great explanation, video and diagrams, thank you.

[@johnjordan4716]

Excellent video. thanks. Driving an audi 80 tdi with a 1Z engine, giving grey smoke and idles rough when engine is hot. No warning lights on such an old car. Could this be PCV valve issue?

[@0610591]

Tank's

[@ralphjeanbenoitpetit6192]

Good video

thnx for ur info. keep up the good work. What would cause an engine to not feel smooth in the steering wheel, while when running? NOT a vibration, just a weird, not so smooth feeling in the steering wheel, as it use to feel. The vehicle running great, but is 15yrs old with 195thou miles.

[@guysmith6616]

Power steering fluid? Loose belts? Front tire issue?

[@jaymesbenny7346]

Thanks for the information, but I don't know how to locate mine. I have a Nissan Primera 2000 model

[@Spoot401]

I had anti-freeze constantly bubbling up and getting all over my cylinder covers in my Crosstrek. I've taken it to a mechanic, and they told me that the PCV valve was busted and had sucked oil into everything, and the oil had caused a lot of tubing to crack and break. Estimated cost of repairs would be ~$1000 (all while saying there's no guarantee it would fix the issue). They also told me this could have been caused by an oil pan leak (Subaru gonna Subaru), and they gave me the estimate of $6000 to fix that. I'm thinking on just having the PCV valve and tubing replaced because that seems to be the most likely candidate of what caused the issue (and on a vehicle w/ 127K miles on it, I don't think the PCV valve had ever been changed). And if the oil pan is leaking, it must be a small leak, because I don't see oil on the ground, so it can leak a little while longer for as much as I care.

[@lucasorlando1703]

Great video! My car has a strange behaviour, while change gear from 1st to 2nd and from 2nd to 3th the RPM increase when I release the gas and press the clutch , could be the PCV valve ?

[@chuckwalla2967]

How do symptoms differ if the valve is stuck closed or open?

[@charlespratt8663]

PCV are generally cheap to replace. Use the factory part if available. They can also be cleaned with a couple shots of degreaser or brake cleaner after removing from engine.

[@alnakba]

I read somewhere on the box when i replaced mine that they last 60k miles on average. Or maybe that was their warranty? But not an expensive part for 60k imo

[@reefazrahman6093]

I have a Elantra 2018 GT (Base). Is it easy access to change the PCV valve? I get a rough sound when starting the car and saw some oil over the engine gasket beside the spark plug area.

[@benfel9403]

This is just the video I was looking for! I have a 2007 Audi A6 C6 with a 3.0 TDI. For a while there has been an odd unburnt fuel smell at the back of the car when warm and idling (not when cold, no smell or smoke when cold) or when has been sitting in traffic, only a puff of smoke. Does not consume oil, no check engine light. Noticed where one pipe leaves rocker cover and feeds back in at turbo, both areas now have a light misting of oil (sweating not soaking everything) has felt OK for most part, pulls hard and smooth, returns good gas mileage, starts fine, idles fine, but about three times felt the slightest fraction of a second hesitation. Can I ask does this sound like a stuck open PCV valve from what you have said, or a failing one. Car is on 180,000 miles. No excessive oil puddle inside intake area where breather feeds back into intake. - I have a funny feeling the PCV valve will be burried in the V on these engines :) Any thoughts would be great as a starting point, great video thanks ! Ben.

[@bigbadboogie6842]

Civic type R FN2 PCV about 40$ + aluminium washer 30 cents = dont skimp on the washer 😅 located close to the alternator and pretty easy to swap. Hose clamp is the hardest part to reach.

[@driinc3302]

wherte is pcv located valve located for 2015 Mercedes CLA45 AMG ? Right side of intake manifold or near tyhe catch pan toward the axle?

[@jamiebergamine1012]

Can you tell me where the pcv valve is located on a 2017 ford fusion titanium 2.0 ecoboost?

[@joesalemi2414]

This video was very helpful. Thank you so much. My 2011 5.3v8 Silverado has 178k miles. It burns a little oil. I use it mostly for long long trips of 250-2k mile trips. I cruise at 80MPH sometimes in Mountains. I want to avoid a ring job or blowing various seals…. I don’t have any symptoms of a blown PCV except oil loss about a quart every 3K miles. Also oil is black at about 3K miles. I think I should replace the PCV as a preventative measure. What is your opinion? Thank you.

[@MechanicBase]

I would definitely replace it. This is a cheap part, and the job is not overly difficult👌

[@peteloomis8456]

2011 shouldn't have a pcv valve because it uses a special breather that's in the drivers side valve cover that separates the oil from the blow by fumes and there is a upgraded valve cover for it that you can buy for it because there was a tsb on this from 08 models up that were having issues of to much blow by clogging up the throttle bodies on these engines . Also if your AFM auto fuel management system is still turned on that shuts cylinders down to conserve fuel and get better fuel mileage these engines had problems of those cylinders 7&8 I think it was where when they are shut down to much oil gets sprayed from the sprayer in the oil pan that sprays those cylinders and what happens is it's too much oil and after a while this oil turns into carbon that gets into the oil control ring lands on the pistons and what happens is the oil control rings get stuck in the ring lands instead of being pulled out to the cylinder walls by the cross hatch marks from the honing process when the engine is built at the factory and the honing process is what pulls the compression rings and oil control rings out of the ring lands into the cylinder walls so it builds compression. So once those oil control rings are stuck in those ring lands you get more blow by and oil consumption because the oil rings aren't doing their job of scraping excess oil off of the cylinder walls on its way back down . Try the valve cover and if I were you buy a Diablo sport tuner that lets you turn the AFM off or a Range disabler that turns the AFM off that plugs into the OBD port on your drives side just under the dash . I was have the same issue and did the upgraded valve cover and shut the AFM off and less oil consumption and the trucks instant fuel economy gauge in the dash says I'm getting only a 1.5 mile less fuel mileage with all 8 cylinders working . The other thing is if you leave the AFM on eventually you will have lifters that will fail because when the VLOM that's under the intake valley pan turn on and then cuts the cylinders back those lifters aren't being lubricated and they will fail and can do engine damage to a point that the engine is junk and either has to be rebuilt or a different good running or new crate engine installed . There was a lawsuit against GM on this but the judge tossed it out and probably was paid off from GM to do so under the table and a lot of people were having major issues with these engines . This covered the 2008-2012 models but now there is another lawsuit that is for the 2012-2021 trucks with the 5.3 engine that are having the exact same problem but if the people's lawyers win this they will be the ones that get most of the lawsuit money and the people who wrote their names down to add to the lawsuit they won't get enough money from the lawsuit to even fix their engines or have them replaced by GM . The only way GM did any repairs on these engines is it the truck was still under its 5 year 50,000 mile warranty or if the person who bought the truck had bought the extended warranty and GM would honor that but nothing past these . They make AFM delete kits that come with a new cam and roller lifters and lifter boxes plus the head gaskets and pushrods and needed plugs to plug the oil ports off from the VLOM so the engine runs with out the AFM runs on all 8 but after this is done you need to send the computer into have the AFM shut off internally or use the Diablo sport tuner or the Range disabler but once done these engines actually run much better than they did from the factory and make more power . GM also made a oil diverter that shuts that oil sprayer off and takes that oil and sprays it towards the oil pan sump where it should be and found out that spraying all that extra oil in the bottom of the engine specifically at cyl 7&8 that wasn't a good idea because it was causing the mentioned extra oil consumption and blow by because of the stuck oil rings .

[@joesalemi2414]

@@peteloomis8456 wow thank you so much for this deep explanation. Well said and thank you for your time. I’d like to turn off the VLOM but the dealership warns against it. Also, I am a bit confused about the Diablo system. If I do that will I have to replace the rollers and plugs and all? Or are you saying that the actual modifications cause further problems and to just do themDiablo only?

[@elmamorabe37]

Can I find a PCV valvle alone for a Chevrolet Orlando or do I need to replace the whole cover?

[@PANTYEATR1]

If you do an engine swap and increase displacement from 5.0 liters to 7.0 liters, should the PCV valve be upgraded or enlarged for the bigger displacement engine?

[@dmghuncho8601]

Have a 96 grand marquis replaced valve cover gasket on passenger now it idle a lil ruff n act like it wants to stall wen I put shift to drive could this b a pcv value going or have gone bad

[@richardmorse5307]

I have a 1998 Honda Accord V6 with automatic transmission and 328,000 Km. For about 5 years there has been a thump or thud when starting it when cold. As it warms up the thump or thud gradually decreases to the point at normal operating temperature it’s quite mild. I have had the plugs replaced, the EGR valve cleaned, the valves adjusted, the MAF sensor replaced, the throttle body cleaned and oil and filter changes done regularly. Nothing has helped. I would be grateful if you could advise. Thank You!

[@stuartwinstanley4949]

So what is the advantage of fitting a catch can as this isnt a controlled circulation

[@pamelaherman7863]

Can you please help me on a 2008 Chrysler Aspen 5.7 hemi.

[@rafaelcirurgiavet]

i did my our substitution in y car subaru forester, and its is so easy, and the last valve was bad for sure. i spend 25 usd and clean too map and maf sensor with correct products. . its runnig 600-700 rpm and no oscilnation.

[@dd___dc]

My car boggs a lot and I recently noticed a lot of oil leaks around the engine seal and even the engine oil filter started leaking oil I am not if this maybe the issue

[@kevinyork4757]

Can it cause rich FM errors like po175? Honda Pilot 2016

[@lucidfairytales]

Hello Can you please tell me how to find my pcv valve on a 2013 Ford focus 1.6 l engine?

[@mercamg9312]

Hello. My Mercedesc32 AMG has a rough idle. l cant find the PCV valve. any ideas. Thanks

[@TangoJR_10]

What is the name of that scan tool on your phone? I wanna download it

[@alanarmstrong9571]

Where is the pcv valve located on the 2013 hyundai genesis 3.8 sedan.? Please.!

[@kashiflf]

Nissan sunny 2006 automatic gear jerks while shifting 2nd gear?

[@daviddowns7552]

some cars are rediculas to find and replace these. they are well hidden is what im saying. important to change out or clean if good.

[@michealadenibuyan9241]

Please I have search through the internet and cannot find / identify the PCV valve of an M112 engine. I saw that of M272 but not that of M112 which I need. Yea I know the hose only. Please can you help with a link to the PCV of an M112 engine or the image. Thanks in anticipation.

[@notbuyhouse]

could you tell where the PCV in 2006 Hyundai Elantra? thanks!

[@MutsopotsiR.D.]

Can you help me locate the PCV valve for Toyota Vitz

[@nandiuaroro]

Hi. I need help locating a pvc valve in a hyundai h100 2007 engine

[@user-ro7bf3sc6u]

My jeep srt consume a lot of oil with no smoke. I only smell gas when starting the car. Do you think a bad pcv valve could cause the oil consumption?

[@user-to2fe5nk4g]

what problems if engine breather give water out??

[@nolix3420]

I got a code for a pressure control valve 1 n215 but idk witch part it is theirs many that pop but idk witch is the correct one can anyone help

[@majed9r]

in the diagram you show the PCV Valve installed in the head of the engine which is not correct, it is install in the Cylinder Block as its name indicates , Positive Crankcase Ventilation,

[@MrLuist12]

Help sir ⟟ have code po300 and ⟟ have pressure inside the engine, ⟟ can noticed when open oil cap also have cylinder 3,5,and 6 misfire

[@SamSung-cz7os]

Hi, could anyone help identify the pcv valve of D4164T engine, its 2.0D , which is used in ford, peugeot and volvo? Thanks

[@user-ue8ob7vx9b]

i got opel meriva 1.6 2003 it smoke after i did valves but enjin runs smoot and stall at times

[@philipdeg1594]

Thanks. Just the video I was looking for; it was very well explained. Where do I find the PCV valve in my Mercedes c200 1.8l turbo.

[@MechanicBase]

What year is your Mercedes, @philipdeg1594?

[@gavonialagrange9950]

Can you please tell me where the 2016 Opel Mokka 1.4 turbo, mine does the same, releasing white/grey smoke. Thank you

[@Zeek800]

That’s the PCV valve and is very common on the GM ( Opel included ) 1.4 litre turbo engine. The PCV system fails on these vehicles because of a small “ rubber??? “ valve in the intake. There is a company that makes a kit that bypasses that weak link “ valve” in the intake and you end up with a check valve in one of the hoses that can be serviced in under 10 minutes if it’s needed. Repair shops and Dealerships replace the plastic intake manifold and the plastic valve cover but that only “ fixes things “ for a short time and the problem will reoccur again. Like this guy said “ it’s not cheap “. The valve cover is around $150 Canadian dollars and the plastic intake manifold is three or four times that. Along with several hours of labour at $130-$170 an hour you’re looking for a big Bill. If you search Dre Dan on KZbin and you should find the info to check out the kits.

[@alitas8017]

Hi guys, i have an audi rs3 2.5 tfsi czgb engine. When i startup the car it gives a light blue smoke and after only condens i think and when i rev the car the blue puffs come also.. not when idling. Just startup and revving the engine.

[@brailosky15]

Hi l took my car to the mechanic to get a valve gasket replace and after 3 weeks of driving it completely shut off and on further inspection I noticed that the pcv tube assembly was broke but it seen like it was patch with a heat- shrink tube. So now they told me It seen that I got a head gasket leak and that what cause the issue on the first place. The car it's 2014 with only 75000 miles so it's neither to old or with high mileage.

[@lisarussell5959]

Where is the PCV Breather location on a 2013 GMC Terrain Denali, is it connected on the back of the intake manifold?

[@MechanicBase]

Yes, it should be.

[@trillvarr]

I have a 1995 Chevrolet Camaro (6 Cylinders S 3.4l MFI OHV 207 CID) and I need finding both ends

[@lylipop]

I have a 2017 Mitsubishi Lancer ES 2.0L with rough idle, sometimes will blow smoke upon stepping on the gas pedal, will stall at red lights, leaks oil from an unknown source, and has a check engine light. Fuel economy seems to be unaffected until the symptoms appear as they are intermittent. The car will go into limp mode as well. I have replaced: downstream o2 sensor, valve cover gasket, air filter, oil changes, etc. Does this sound like it could be a PCV valve and do you know where it would be on my car? Thank you for any help provided, and I loved how you included the mechanics behind the PCV valve as well!

[@MechanicBase]

Do you have an OBD2 scan tool, to check what codes you have? But that might be caused by a stuck-open PCV valve.

[@justinhoernschemeyer8724]

Be aware there is a small bb in one of those vacuum hoses on top of the motor. Dont just rip those out and replace. Find the bb in the hose.

[@gregsudell2069]

2004 grand vitara 2.0td rhw. Does anyoneknow the location of pcv valve please. Thxs.

[@ashrafsiddiquee3190]

What dose a bit oil on PCV means ??? Please reply

[@fava7753]

Where is the pcv valve located on Mazda 6 . 2.0 diesel 2008 . .

[@brandypresley1869]

Mine is blowing no air out of the holenright above the cap does that mean its bad bevause my car is blowing white smoke

[@Stainless316L]

Should pcv valve be closed ie not venting at idle ?

[@asaf5765]

Is the motor 1KZ TE diesel parado 1998 equipped with a PCV VALVE ?? If yes , what is its location.?? Motor expert already changed new turbo for excessive white blue smoke+ engine oil from tailpipe. No effect Living in rural area Pakistan Any guidance from any one plz. ??

[@ForuXe]

HI! Where is the valve on Audi A3 75 KW 102 hp BSE 2006 ?

[@dleblanc3592]

Thank you for posting this video. My truck has all six symptoms. I changed out the knock sensor. I did a full tuneup. I replaced the mass airflow sensor. I replaced oxygen sensors. Tomorrow I will be replacing the PCV valve and I guarantee the truck will be normal again.

[@derriesebean327]

Did this work for you

[@jedidiahshilts7152]

Well how's truck running bra

[@syfodias-jedimaster]

How did it go? Did the pcv fix it??

[@mrcompfident6916]

How’d it go?

[@alexmendoza525]

Would you happen to know where the PCV valve is located on a 2016 Ford fusion se 1.5l Ecoboost?

[@camojoe83]

Check the drawing on the stickers under the hood, genius.

[@sannyskysr]

Where is the pc valve of a 2003 mercedes benz c240 located?

[@ericcano1219]

I am having trouble finding mine. I have a 2004 Saturn Ion 2.2 Eco.

[@mohamedkantaoui5862]

Can pcv valve cause oil leak in turbo for diesel cars ?

[@perecarlmeinane3816]

Where is the pcv valve located in a Ford fusion 2006

[@androbacic2161]

Can you please show me where a PCV valve is located on citroen 1.2 puretech turbo petrol engine? Thanks in advance

[@josephratowski8223]

what is a citrogen some kind of virus

[@ikhan5]

Any ideas where the PCV valve on an Alfa Romeo MiTo 1.3JTDm is? Same engine is fitted to Vauxhall Combo and Suzuki's etc....

[@MechanicBase]

Hey @ikhan5 - it's most likely integrated within the camshaft cover. Look for a, say, 1/2" tube that connects the intake manifold and the top of cylinder head.

[@borcemkdnegotino]

Bmw f10 n57 motor. Where is located pcv valve?

[@PainkillerDubstep]

Where is PCV Valve on a Opel Insignia 2009 2.0T 220hp 4x4 ?

[@JCGible]

Can a presure build up cause the plug wires to pop off?

[@MechanicBase]

That's not likely.

[@charlesimo2865]

Pls where is a pcv valve located in my rx330 Lexus jeep?

[@Ahmad-tx5dr]

Hi, what about if smelling gasoline in cabine while idle and stop light. It is effected by bad PCV?. Golf mk5 r32.

[@MechanicBase]

One of the things that can cause this is an EVAP leak.