VAG Overboost Fault - P0234 - Turbo Repair Step By Step Guide
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- เผยแพร่เมื่อ 20 ส.ค. 2024
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1) Link For Carbon Cleaner www.amazon.co...."
2) Link For Turbo Cleaner rover.ebay.com...
3) Link For Reducing Carbon Build Up *HIGHLY RECOMMENDED* I use this on both my diesel vehicles & I recommend to my customers. I have seen great results in cleaning & emissions reports from using this product rover.ebay.com...
In this video I work on an Audi A6 TDI which was having very poor performance showing multiple fault codes, I source the Overboost fault causing p0234 to be logged on the ECU.
I show where the main problem was and what I done to rectify it.
Tool options that I recommend and use. www.amazon.co....
I hope you found this video useful, if you did Please Like, Share & Subscribe for loads more automotive videos.
Thanks for watching :)
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Disclaimer:
GerardBurke is a qualified motor technician who has completed modules & courses in manual handling and all aspects of workshop safety. These videos are not intended to be used by anyone who is not trained and or qualified to carry them out.
Due to factors beyond the control of GerardBurke, I cannot guarantee against improper use or unauthorized modifications of this information. GerardBurke assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. Use this information at your own risk. GerardBurke recommends safe practices when working on vehicles and or with tools seen or implied in this video. Due to factors beyond the control of GerardBurke, no information contained in this video shall create any expressed or implied warranty or guarantee of any particular result. Any injury, damage, or loss that may result from improper use of these tools, equipment, or from the information contained in this video is the sole responsibility of the user and not GerardBurke.
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What a gentlemen. Taking the time to do this and record it for all to see and learn. Thank you 👌👍
Thank you
Very nice brother i had this problem in my car i have watch your video and i have fix my car brilliant work bro happy with your work i am copy cat watching your video to fix my owen car thankyou mate mechanic they were asking me to much money but you are the man save my money double thanks mate i am not mechanic but i can do a work watching a work than i can do that work brilliant copy cat i am lol .make some more nice video sir and boss uk england
wow. not only the procedure but also the attitude of the mechanic is just marvellous.
Thank you
Mechanic? lol. The idiot didnt even know what the actuator is for!
Its a VNT Turbo, It doesnt have a Wastegate... the actuator is a variable Vein Actuator... :P
@@MightyGimp comment was 2 years ago dude... Bit behind on the times
@@The_English_Miner are you mad? He clearly knows the difference in vnt and wastegate, simple word play, it's still an actuator. Most so called mechanics wouldn't even bother with this and would just tell the customer they need a new £700 turbo before labour.
Fabulous in depth explanation of the causes, troubleshooting and components of the TDI over-boost problem. Demystifies it all.
Good video, one of the better videos on TH-cam showing the whole job start to finish, something I need to get round to doing on my tdi
I used this video to check my turbo on my A6. Very good video and easy to follow. Unfortunately my turbo was completely broken. Many thanks for the video
Brilliant work Gerard, from a fellow Irish stuck in Tenerife with a T5 AXD overboost problem looking to get home for xmas, this has been the most informative video I've seen. thank you Mo Chara
Cheers Niall
Very good video. I have an issue with my wife's car over boosting and this has helped me understand no end. Big thumbs up.
Thanks Adrian for the kind words
This is when a soda blaster becomes your best friend...
Excellent job Gerard
Hi, I am impressed. You have made this video as much as short without missing any details right from problem description, possible causes, dismantling details with adeqaute video angle, clarity and audio details. awesome.. good..
🙏🙏❤️
Ohhh thanks man!
I've just bought a copy of my A4 B7 engine, to learn from. This turbo is exactly the same as the A4 B7. Lovely work! Thanks.
I know the video is old now, but I appreciate it today. Well done.
Brilliant video i wish every single mechanic did his job the same way you do it
Has to be the most detailed oriented video on turbos I've seen...#SaluteSir
Thanks Victor
Very good video, well explained. Though I'm going down the Mr Muscle way. I understand the turbo much more now. Thank you.
Thank you for uploading,not too hard a job where special tools are required,as you say just be patient organised and tidy,take a few pictures on strip down to aid reassembly
This is an excellent video, but at 1:56 and 3:14 that's not the wastegate. That's the vacuum-operated actuator, which is connected to the actuator rod. The actuator rod operates a variable vane on the turbo. This turbo does not have a wastegate....
yeah this dude had me thinking I myself was the idiot, thanks for reigniting my faith in myself lol
People tend to call it a wastegate, force of habit
I would like to thank you for this video< made in a professional way< explained for simple and full detailed. I learned some new thinks thanks to you. I think my turbo needs a nice clean up, my rev is not going more then 2000rpm with pedal down< hope this clean-up will do the job. Thanks again.
Fantastic video. That it the problem i have on my Touran. So i will be ripping my turbo off and clean/replace what i need. What a class gentleman
How did you find removal of the turbo? It's on the back of the engine so did you remove from below? Did you also remove/loosen exhaust? Cheers.
i always go for a long drive almost everyday but today my vw passat turbo charge went to a limp mode,,,, glow plug warning light flashing and loss power at the same time,,,this gives me an idea where to start looking for faults,,thanks great upload
Thank you for the video.my turbo over boosted and blew an pipe.new turbo home now.
Thank you for taking the time to show us how to clean this Turbo
i wished i watched all of your video when putting a new core in ive never done one before and ive been compleatly confused why my car still isnt boosting. and i now see where ive went wrong its to do with the turbo fins didnt move so thank you so much im 100% certain that is my issue hopefully i havent screwed my turbo.
An excellent video, well explained and logical. Thank you very much for taking all the trouble.
Thank you very much for this video and commentary. It's exactly the problem I'm having at the moment. So thanks again 😉👍
Great video, my Audi A4 2.0tdi suffers form over boost and restricts to 3,000 rpm, so will definitely be giving this a go.
same with my ford focus :(, i will try tomorrow
@@danield3791 Hi Daniel, I haven’t cleared the fault but it’s so much better after changing out the fuel filter
i have the same problem on my audi b7 tdi 16v 2008 uk model. thanks for sharing, this will help me save some money
thanks a lot dear..
Such a clear, enriching and helpful explanation
You answered some questions that were always on the agenda..
Dziękuję za film , bardzo dobry materiał szkoleniowy.
Pozdrawiam z Polski.
Gold in the form of great content..great quality work and thank you!
I had a P0234 on my Mazda CX5 2.2, turned out a hose had popped off a very difficult to access turbo actuator at the rear. Aside from throwing the error code under heavy and prolonged acceleration, two symptoms were oil in the intercooler (likely from the first turbo working so hard and never swapping to second turbo), and the wastegate readings via OBD2 were unusual. Easy fix once found.
Great Vid got this exact problem. Got a good idea how all this works now.
Great video. Clear step by step. Increases my chances of doing the job from 0% to about 50%- we shall see.
Thanks Andrew 👌
Great video, tiny point on terms - this turbo has no wastegate, the item you are pointing at is the VNT vacuum actuator
Also a damaged diaphragm on the actuator caused by negative pressure in the actuator perforating the diaphragm I know because it's happened to me and no mechanic could find the fault but I found it
very good video on how to guide. not many of you chaps about anymore. big thumbs up for you sir
Thank you.
the best video that show one of overboost causes
thanks a lot
Thanks to the gentleman ,same problem with my golf 5 TDI
Couple of questions for anyone here:
- has anyone used an electrolysis bath to clean parts like these? I’ve had great success using electrolysis with cast iron cookware and bike parts. Seems like it would be great for engine parts...?
- do you apply any kind of lubricant to the internal parts after cleaning and before reassembling?
Really fantastic video!
Do you mean 'Ultrasonic' bath?
No, you can't use lubricant as the temps would just burn it off!
Actually a light coat of dry fluffy carbon is a good lubricant.
Excellent video, a good walk threw on how to do the job from start to finish, I've got a diesel meriva to do and this video has clarified a few things for me,I was going to go for the spray option but now I will just take it of and do it the proper way,then its done right first time,keep up the good work
Thanks Lawrence, good luck.
@@GerardBurkeBurkesGarage I took the turbo off and cracked it open, it was packed solid with carbon, and seized a little, got it all freed up and spotless, rebuilt it and gave it a run,its still loosing all boost after a couple of seconds, so the plan is to replace the actuator and vacuum selinoied, found two brand new ones for thirty pound,so it makes sense to do it while I've got all the bits off and good access, fourteen year old bits,so I will keep you posted and let you know if all is well next test drive lol
All the best.
Awesome description in educating the issue. Well done. A+++
Thanks for posting you were very thorough and in detail, very helpfull video this put light at heart of the matter..thank you once again...
Excellent detailed video and thorough explanation, top man Gerard!
I'm glad your willing to fix it for your customer rather than replacing it.
I always try my best for the customer
Very good. I learned a lot there. Thank you. I have a similar investigation with my Corsa 1.3 TDi
oh Bugger... I need to do this on my Jeep Patriot. might get a quote from a Garage first to see if it's worth a weekend of my time or a professionals time.
thanx man i just saved 150€ for used turbin and fixed mine passat 6
👌
Very good job my friend and thanks for teaching me good
Thank you so much for this video well explained too . Car and money saver you definitely are. Massively appreciated 👍👍👍👍👍👍
I've got the exact same issue on my 10 yr old polo . The good vw dealership told me they can only replace the turbo with new one at almost 1/3rd the current valuation of my car and won't clean it. I wish I could find someone like you in India.😢
once you have that turbo side off, or even before you do that, spray plenty of Mr Muscle Oven Cleaner into the hot side of the turbo, helps remove plenty of the carbon!
Thanks a lot for the very detailed video !
Great tuition, thank you much for your time! I understand the turbo much better now.
P0234 gl 320 cdi merccedesk
Got one of these turbos on my car, very informative video. Thanks for making it.
Another common fault on these is failure of the internal rubber gasket in the actuator resulting in a huge vacuum loss and non operation of the actuator with associated boost/ limp mode issues . ( i know because it happened both on mine and my daughters VW ) ...One way to check if this is the case is by applying suction / vacuum to the pipe going to the actuator a vacuum tester is idea but if you dont have one ... you should be able to "Just" get it to move by sucking on the pipe and watching the actuator to see if it moves ... New gaskets can be bought on ebay pretty cheap but are a bugger to fit properly ... a replacement actuator would be a simpler fix if possible ...
Great input, thanks
Awesome vid , thanks for taking the time to make it
great presentation Gerard! God Bless !
Thanks very much Jimmy
So basically if I’m understanding this the PO234 code is it’s lacking the functionality of being able to be moved so it needs a cleaning. Hey what kind of damage does this do driving around and not fixing it for a while
Is that a customers car or your own? I can't see too many garages bothering to do that, they would just charge for a new turbo, the stealers would for def.
Great video, thumbs up
It was a customers vehicle. thanks for the kind words, I am glad you enjoyed it
Mark Walsh how much it would be to do a job like this ?
Good to see you 'doing your best' for the customer, Gerard...watched a later video you shared that you mentioned about your families ethos of never trying to sell or do something that was 'untoward'...Without customers you don't have a business and the best accolade any business can get are repeat clients and word of mouth recommendations. Bang on!!!
Thanks very much Malcolm. I will always stand by them values no matter what. Money is never worth a loss of integrity. I appreciate your comment very much. Thanks again
@@GerardBurkeBurkesGarage WELL well said 😊
Cool video. Im having some probs and suspect the turbo.
Im going to tackle this when the weather gets better. Cheers
Dougie McBride how did it go ?
Thanks a lot 😀
Yep that's whats up with mine, major nightmare removing turbo though.
Certainly can be Dan. Good luck 🍀
just to put things right here and avoid confusion. That is NOT a waste gate actuator. You are working on a VVT (variable vane turbo). The vacuum diaphragm actuator operates the lever that moves the variable vanes on the exhaust side of the turbo which varies the boost pressure. A waste gate is totally different.
Yes I replied to these comments from very early on, it was an (audio) slip up but I didn't feel like re editing the whole video because of it. If you scroll you will see I have answered this many times in the comments. I am well aware of the function. I am glad you enjoyed the video
Well done man. You are nice
Thank you so much 😀🙌🙏
Excellent guide👍👍. Thanks
Unreal video fair play pal!
Best video.
The way how he is doing and expalaining is good.
Thanks broo.
I will do tomorrow in my car.
Regards for mechanic.
Great jot and clear Explanation
Excellent video
3:02 Overboost can also be caused by an incorrectly adjusted turbo actuator rod.... sometimes people mess around with them, trying to get more performance out of their car...
Very informative thanks. I'm guessing the pressure that enters the wastegate and moves the diaphragm and rod, comes from the pressure in the inlet manifold?
Great video well explained!
Nice job sir.
I'll give a like
You shouldn't and don't need to remove the intake side of the turbo to do this, it is easier to clock it again if you don't and are not replacing the oil ring seal.
Hi, thanks for the great video. How did you establish it was the turbo, not the pressure sensor or actuator?
Great video my man!
Good video. Well explained how it works 👍
Thank you
I had the same fault on my 2009 Suzuki GV with limp mode, etc. After paying a garage to clean the turbo I now try to keep the variable vanes moving by using Millers Diesel additive, by occasionally pumping in oven cleaner and more especially have blocked the tube that brings the carbon back from the engine. Result ? Many years of trouble free turbo.
Nice video, I did all that to the turbo on my TD6 Range Rover which is basically a BMW M57 and the vanes were seized solid and i was getting P0046 which I believe is caused by overboost. I put it back on and still get the same overboost condition up hill under heavy acceleration, I changed the MAP sensor as the old one showed no resistance compared to the new one and then i started getting a P2038 map sensor fault which says it is shorted to 12 Volts but i think it is actually reading too high pressure as it doesn't give a fault if i disconnect the vacuum pipe to the actuator putting the turbo into minimum boost and it doesn't give the over boost fault either with the vacuum pipe removed . i have already replaced the actuator solenoid and tested everything with a hand vacuum gauge and so I am only left with the length of the actuator arm as far as i can tell. The vacuum, drops to 5 inHg under heavy load and when I looked at the actuator with a vacuum of 5 inHg applied it had already moved a fair distance so my next move is to lengthen the actuator arm unless you have any other ideas? Any help would be much appreciated
Thank You very much sir.
Top job thank you for sharing
My golf has loss power overtaking and i turn of i return on It goes Nice but same after some time ??also does this in highway i go 100km and No acelerate more 😢
Good job
Would you hazard a guess as to why it coked up ? Driving habits , service interval, oil choice ?
I was wondering the same thing but no answer yet?
@@totompa81no nothing so far.
I have a 04 Jetta TDI that i bought with a blown turbo. Just put the new turbo on it. Lil did I know i needed to clean the intercooler from the blown turbo leaving oil behind..The previous owner said he did clean it out after the turbo blew.. I took it for a test drive after letting it run in the driveway for 15-20 mins, i took it for a spin......Then it rev’s WAY up, white smoke engulfs the car... It wouldnt shut off.. It stopped after about 15-20 seconds which felt like an eternity.....Turbo works sometimes.. Its like its in limp mode.. no power! And makes a buzzing noise when it should be building boost..... I shut the car off turbo wrks for a mile or two?? Then it has no power again....
I'm guessing it went into a kind of diesel runaway situation. Revs would have went way way up and the turbo probably would over hear and you have damaged the oil seal. Possibly even the bearing. But the noise your talking about I'm assuming is a broken fin, probably on exhaust side.
Thank you for a great and informative video
Hi! Thanks a lot for this. I just have one question and a moment of your time to check something. So, is this the same turbo as in VW Golf 5, 1.9tdi, year 2004?
Lastly, this is my fault code for my car. Can you tell me if my turbo has gone. Thank you!
16618 - Boost Pressure Regulation
P0234 - 000 - Limit Exceeded (Overboost Condition)
Freeze Frame:
RPM: 2520 /min
Torque: 226.0 Nm
Speed: 63.0 km/h
Load: 70.2 %
Voltage: 14.21 V
Bin. Bits: 00001000
Absolute Pres.: 2029.8 mbar
Absolute Pres.: 2499.0 mbar
Cracking video 👌🏼
Thanks very much, I try to put as much info and detail as I can in videos. I hope their are others you can enjoy too :)
Thank you 🙏
nice video big thumb up!
Search found 6 people asking already, so I'll jump on the pile. What torque when putting it back together please!
Very nice vidio thank you for that 😀👍
I got a 2017 golf mk7,I added a plug and play racechip on my car that was for my car,it was new and unused,wen ever I drive my car with this plug and play chip,it over boost and goes in to limp mode,but wen the chip isn’t on my car it drives fine,you think it’s the chip it’s self
Great job bud ✊🏻
good job
Great video Gerald !
Liked/Subscribed !
Thank you
Good video, cheers for the info
Hi. It's a great video, please can I know where your workshop is ,my Skoda Octavia with BKD engine has same issue, don't wanna risk spoiling it by inexperience. Regards
Great job , great video
Awesome job 👍
Thank you 🙏🙏
Is it out of a diesel or petrol ? Great vid