2006 Jetta 2.5 Air Leak Diagnostic Check Engine Light

Here we diagnose a VW Jetta 2.5 inline 5 cylinder engine with poor running conditions and a check engine light.

[@josephtucci3666]

Good job my friend! The boys on IATN will surely go crazy for not using a factory scanner. Best of luck!

[@eciaccord]

I can’t thank you enough! The camshaft seal was cracked in mine. I noticed oil on the reservoir and all over the hoses near it. I just ordered the part. I had already replaced the valve cover and should have replaced that part at the same time.

[@OOEarth]

Joe! Thank you! These exact two things were blown out; the same cam seal and crankcase ventilation valve! Thanks for the tip. I'm waiting on the seal now. I guess you just push the seal in? I don't see the old seal, there is nothings there, like it just blew it out or sucked it in--hopefully not cause I opted to just replace diaphragm, spring, and cap so I'm not disassembling. I looked in the cam hole with my inspection camera and I don't see the old seal.

[@edwardlodini4306]

Have an 08 beetle just started doing same thing after sitting almost 1 year. Going to check this first.

[@zombiebaker]

this was actually super helpful thank you for your information

[@JoesAutoElectric]

Did you find an issue? If so, happy to help!

[@jtapoling]

Thank you so much for your advice. After hearing what you said I replaced the valve cover and the plug on the side of the motor. Greatly solved my vacuum problem of course which was a huge step in the right direction. Sadly, my car also had two bad coils (misfire 4 and 5 codes) and a bad mass air flow sensor (actually IAT code) which caused me a bunch of other grief. Curiously, now I have run into a weird situation where I get a crank but no start condition when fuel level is around a quarter tank. Only way out of the problem is to put the car in wide open throttle mode. Obviously I can just keep the tank full or go WOT when around a quarter tank but curious if you have seen this issue and what might actually resolve it rather then a work around. Again I really appreciate you taking the time to add this video.

[@elnenegordo3688]

did you find out what is the problem?

[@matthewobermeyer5954]

Interestingly enough, my vacuum leak stopped after I reseated the PCV valve cover/diaphragm (that I had previously replaced) that was not fully clipped in. AND after I took the vacuum hose off the valve intake cover like in your video, and plugged it with my thumb. I could feel good suction and it started running more smoothly. Then, replacing the hose. It seemed to be fine again almost like the leak was causing the vacuum to not pump up to full pressure. After that maybe it fully engaged the PCV diaphragm again and crated a better seal. That’s my only thought. PCV came loose again maybe after I hit a bump or it was never seated proper after I replaced it (preemptively) and finally didn’t seal properly. Whatever the case. Thanks for the idea to test the vacuum with your finger. Fixed the engine somehow.

[@quinfreeman159]

Thank you much for this video!! I have a 06 beetle. I'll replace this cover and see how it runs afterwards

[@quinfreeman159]

Can this cause the engine to stall while driving ?

[@getsudatensho]

@@quinfreeman159 nope thats your cam position sensor

[@quinfreeman159]

@@getsudatensho hi found my issue to be the fuel relay

[@hunterbaird235]

Thank u brother I’ve have replaced all coil packs new plugs and a mass air flow sensor still had the problem then I noticed that cam plug was gone but the other one on mine still same crap going to try the pvc tomorrow

[@hunterbaird235]

Pcv valve fixed it thanks again man I didn’t not have to replace the valve cover just the pcv valve $40 and back on the road again runs better than ever

[@llavezchavstar950]

Thank u so much!

[@JoesAutoElectric]

Did you fix it?

[@fishwanda]

This is EXACTLY what my 2005 jetta is doing. I was about to start throwing parts at it. THANK YOU!!!!!

[@pgdmed]

Hello again, I have a question for you. My 2005 2.5 jetta is blowing a little smoke from under the intake manifold driver side. No oil leaks anywhere that I can see. It did have the valve cover leaking but that was fixed last month and engine cleaned. I took it to a friend who noticed the smoke and said it smells like fumes not burned oil, coolant or gas. He pulled the oil dipstick out and the smoke under the manifold stopped and it started out the dipstick. He told me the pcv was bad. Could that really be the PCV blowing smoke out the oil dipstick? can you tell me where you think it may be blowing from under the intake? is there something else I should look for? Car runs perfect, no codes no over heating, no oil in coolant no coolant in oil. no oil loss, no coolant loss, no tail smoking, no nothing, really sound and great running car except that fume leak that gets in my car cabin and it driving me nuts. Thank you very much your help I greatly appreciate it.

[@kevingriffith6233]

Hey, quick question. I have a 2010 Jetta. The EPC came on, I am loosing engine power on acceleration, It is idling heavy, exhaust backfire (air) at idle, and air is coming through the ac vent we I drive. Any ideas on what the problem is? Someone told me I need to rebuild the engine. Do you agree?

[@mariobonilla2352]

Joe's auto electric I have a 2006 vw jetta 2.5 5 cylinders 6 speed about 3 months ago I had my trans rebuild and lately I been feeling it not running to its full potential first of wen the car is cold wen it reaches 3speed going to 4th speed it revs more than suppose to once it warms up it still does it but not as bad Also my sport gear isn't working how it suppose to it only goes to 3rd speed and nomore after that wat could be wrong? I know i need a new o2 sensor could that be causing issues ?

[@MrJuly151995]

Thank you. Love the info. Just bought a Jetta doing exactly this for $100. I will check the valve cover and seals. Greatly appreciated.

[@armandonika]

A lot of euro have it integrated in the valve cover Joe! 😊

[@JoesAutoElectric]

yep

[@carsonac4163]

I'm pretty sure the 2.5 CBTA and CBUA(cali emissions) have a pcv system built into the valve cover

[@underscoreJ0SH]

My car has an vacuum leak somewhere and that was the first part I replaced and it didn't fix anything.

[@miguelrivera-hk6cc]

Okay I'm glad somebody find out what it is same thing happened to my 2007 Jetta but this time I took it to a mechanic cuz I couldn't find out where the leak was coming from they told me was the valve cover so I put a genuine valve cover guess what the problem was still there I noticed the same vacuum leak out of the camp how to replace the two plugs that go to the camp where the leak was coming from in the cam seal I fix the leak but I still have a problem so if anybody knows something about this let me know

[@paulbryant8402]

Hi..my vw golf 1.6 petrol I had to warm it up for 15 minutes before I can drive it....

[@fishwanda]

Can someone direct me how to get cam seal out?

[@kdautomotive1165]

Dorman makes a pcv valve for these.

[@fishwanda]

2006 vw beetle. When I check oil. Smoke comes out of where dip stick goes. I can also see slight smoke coming from right side. I smell fuel. Today it started acting like it's out of gas. Can someone direct me to Joe video? Someone said it might be variable timing sensor clogged. Can I clean it and how? Need to buy some time being Christmas month.

[@fishwanda]

It's was the VVT sensor. Changed the oil bought me some time. It runs fine now but putting new part in soon

[@miguelrivera-hk6cc]

Other than PCV valve there is another item that I haven't check and it's connected to the PCV valve I disconnected the battery to clear the codes cuz it's still giving me field 301 305 and I replace every spark plug and Maverick oil I swear but I'm still dealing with the same problem once I disconnect the battery start it up and it shows that all my coils are misfiring Plus my mass flow sensor it's not working of course that's what the diagnostic tool says

[@JoesAutoElectric]

You need a shop to diagnose it.

[@jhjhjj35]

I have a 2006 vw Jetta 2.5 and I scanned it and what I got is intake air system leak and multiple misfire cylinder 4, cylinder 5 and cylinder 3 and I just ordered I PCV part for my car do you think that’s the problem causing my car to shift hard?

[@mrflinstone2553]

Jhj hjj i have same car with same issue. I ordered the valve cover, did yours fix the problem?

[@cristalmarquez]

Hi my name is cristal I have a 2005 Jetta 2.5 and I was watching your video and my car is making the same exact whistling noise and I was wondering how much money was it to switch pcv valve

[@JoesAutoElectric]

I am sorry I don't remember how much the part costs from the dealer...I think dorman makes an aftermarket now, but I honestly would stay away from it. Spend the money on dealer parts.

[@montanatatum9598]

the part costs 10$ and its an OEM part.

[@fishwanda]

The valve cover is around $100

[@fishwanda]

I replaced pcv. This fixed high idle while in park but I still have that transmission feeling bump after driving about 5 miles. Is that caused by the cam? I also have a rattle sound near alternator. There was a whistle sound too but i think pcv fixed that as well. Always goes to shit at christmas

[@JoesAutoElectric]

Glad helped you out. It would be impossible for me to tell you what else is wrong unfortunately. If you have a noise, it could be a pulley or something else. As for the transmission concern, again not possible to diagnose without testing it. I would recommend having both things checked by a professional.

[@fishwanda]

@@JoesAutoElectric unfortunately I can't afford a professional this month. You mention in your video a vacuum around the cam. I'll check that next. Codes were all air leak related. I didn't check cam. Thanks again!

[@fishwanda]

@@JoesAutoElectric The pcv has a housing that pops off to replace the pcv alone. On mine anyway. $30 at ABC Auto Parts.

[@fishwanda]

@@JoesAutoElectric I just looked. I have a leak on exact cam shaft seal as in this video. I'll replace soon. Hope this completes my issue

[@Lex-uf8ju]

The Chevy Cruze turbo does the same thing

[@virimonfil1621]

Hi, I have a 2006 Volkswagen Jetta 2.5. After driving in the city for a while, the car starts to jerk. A mechanic told me it's the transmission. Could you tell me your opinion.

[@JoesAutoElectric]

The symptom you are describing can be caused by different things. It is impossible to make a diagnosis without having the vehicle to test. It could be a transmission issue, or an engine performance issue.

[@virimonfil1621]

Thank you for replying so soon. I took the car to the mechanic and he told me it is the valve body assembly and it's specific to the transmission it will need to be matched to the vin #. It can only be bought at the dealer. the cost is $1200.

[@TopVideos-tp5zd]

I have a 2006 vw Jetta 2.5 with check engine light and the transmission shifts bad after 15-20 min and I’m hoping this is the problem why my transmission is shifting bad thx

[@kumbackquatsta]

check pcv diaphragm, if it's torn, replace. if issue persists, check map sensor, either clean or replace. also clean out throttle body if oil got to it. tranny is rough shifting because of dirty/bad map sensor

[@mondo9.2.5]

@@kumbackquatsta when i clean my thorttle body will it relearn on its own i dont have anything to reset it

[@kumbackquatsta]

@@mondo9.2.5yes in my case it did, just be gentle and thorough, don't spray directly on it, do it on a cloth and wipe it down.

[@mondo9.2.5]

@@kumbackquatsta wipe both front and back but not touch the flap ?

[@kumbackquatsta]

@@mondo9.2.5 you can clean the flap, especially the edge. just be gentle with the flap and don't the spring tension snap it back, let it go slowly. you want to avoid any electronics or directly into the cross-axle

[@SoloMangoVR]

Hi. My car isn't running great everytime i rev it between 2000 3000 rpms it makes a scraping sound and acts as if the car wants to putter and die. No lights are on idn it almost sounds like it comes from the timing chain area. Any help would be great. Its a vw jetta 2.5 2005 thanks

[@JoesAutoElectric]

Bring it to a shop who can check it for you.

[@juansierranegron1666]

Hey, I have a 2007 2.5l jetta, when its cold it runs without trouble but when the engine get warmer it starts jerking, i ran a computer test and it doesn’t appear any transmission code just an air intake leak. I don’t know exactly what to do if I need a trans rebuilt or what... Any recommendations?

[@JoesAutoElectric]

First off assuming it is a transmission issue is a mistake. The car needs to be checked by someone who is capable. Air leak? What code did you have?

[@juansierranegron1666]

Joe's Auto Electric I went to a transmission shop and they ran the test and it doesn’t appear to have any code the transmission at all they told me the only code that the car has is the leak in air intake sys (08825 ) is the code

[@JoesAutoElectric]

If the car has a leak in the intake system, this means it is pulling air from someplace other than the throttle body. In other words, this will effect fuel trims and make the car run poorly. Fix the air leak first. The best method of finding it if it is not obvious with visual inspection is the use a smoke machine. Many shops have them. You need to bring it to a place that knows how to test the vehicle.

[@juansierranegron1666]

Joe's Auto Electric and the jerking has something to do with that leak?

[@JoesAutoElectric]

I cannot be sure without making an actual diagnosis, but I sure would say it is a good place to start from what you are telling me.

[@willbrown1493]

I have a 2006 Jetta 2.5 and as of last Friday it Idles up to 30 rpm and back to 10 rpm when ever I'm not accelerating. Any guess what this could be.

[@JoesAutoElectric]

+Will Brown Sorry for the late response, I have been very busy. It is difficult to answer your question because there can be many things causing this problem. First thing I'd want to know is if the check engine light is on. I would also scan test for any codes just in case something is pending. Check for vacuum leaks, and look at data stream to see what is going on .Of course, this is if you haven't repaired it yet.

[@zehxty9728]

Will Brown Having the same problem as of today. Same year same model.

[@JoesAutoElectric]

Have you had it checked?

[@Jettrap505]

The valve is replaable now it's like 18 buchs at AutoZone

[@JoesAutoElectric]

I would not recommend any aftermarket fixes.

[@vicchavez6570]

It was in limp mode so it won't shift

[@fishwanda]

Hi again! The part online (cam seal) just doesn't look like what I'm seeing on my car. What you're showing on video and what I see on my car is a solid rubber piece. The part online looks like a donut. Can you send me a link to the cam seal part so I can order It? Please :)

[@JoesAutoElectric]

I am sorry but this is an old video and I have no idea of links tot he parts. My advice would be to call the dealer with the VIN and they will give you the part number. Thanks for watching

[@fishwanda]

@@JoesAutoElectric thank you very much

[@adamdarryl7429]

You can actually order the diaphragm repair kit and not have to replace the entire intake. I just replaced one.

[@adamdarryl7429]

Pcv repair kit I meant*

[@reginaldpaa-kweku709]

how much did it cost to fix the problem?

[@JoesAutoElectric]

I'm sorry, I don't remember the price.

[@bloodwolf2427]

I keep getting these stupid VWs with this problem. Smoking the intake does not find it (pressure) only seems to leak under vacuum. And its all plastic molded hoses so you cant pinch off any of them and instead have to plug with your thumb.....I really dont see what is so damn great about German engineering this is asinine.

[@JoesAutoElectric]

Well, I completely agree with you. Not a fan of Eurojunk either.

[@kmax7163]

I have 09 rabbit. It's been nothing but packaged- up problems. Not reliable. Bosses don't appreciate unreliable cars when ya gotta get to work every day.

[@TopVideos-tp5zd]

Hey man so I read codes on my 2006 vw Jetta 2.5 and I have P2279 intake air system leak, P2185 Engine coolant temperature sensor higher circuit High, P0171 System Too Lean Bank 1 and P0507 idle air control system RPM higher then expected! Do you think that’s what’s causing my transmission to shift bad? Please reply Thanks

[@JoesAutoElectric]

As much as I'd love to help you, I would be lying if I gave you advice on a vehicle I am physically unable to perform getting on. Best advice for you is to bring it to a shop that works on these vehicles.

[@TopVideos-tp5zd]

Joe's Auto Electric ok thx

[@jessemast8153]

Hello, I have 06 Jetta with 2.5 engine, and have 3 codes p2279, p0171,and p0507.. just curious if u got yours fixed, and if so, how? Thanx!

[@AVPKING1]

I have change the Valve Cover and the map sensor bc both were actually damaged but the leak is still there. This is making me really angry lol. Besides not having anything besides basic tools