I can not express my gratitude enough!!! Outstanding!!! I found the problem in 10 minutes following your advice. It was the boost control valve. It was always venting. Thank you!!!

Thank you very much, I really appreciate people taking the time to upload these videos, you just saved me hours of BS. Thanks from Australia.

Man I don’t know how to thank you you saved my day, I been a mechanic for 14 years never worked on a sprinter didn’t understand the vacuum system now I do good job buddy , but the sprinter I’m working on have issues with booster changed the booster same problem, gonna check the vacuum tomorrow let you know

Thank you sir!! This fixed my vehicle. What a pain to change that part! Awesome thanks again 👍🏻!!!!

Thank you very much. I’ve been getting an overboost code And surging from 1400-1900 rpm. I just got an outlandish estimate from a car repair place. Im going to try and replace this piece first!

Great video! Man I have 2015 sprinter with code P245C something with the EGR valve we did work on this engine to reemplace the Orings from oil housing now I have 4 codes !

Another great video

Brilliant videos..very helpful.thanks a lot.

Great information 👍 my UK spec 2.1 is having the same issues. Went into limp mode on a long journey, thought I'd fixed it as I found the battery terminals loose. After another long journey same issue. I can get vacuum but it won't hold it it slowly leeks off, if I clamp the pipe from the vac reservoir to the boost control valve under the egr cooler it holds vacuum 🤔

Great info Thank you

Finally someone posted a real solution video. Thank you so much!!!! Had my sprinter staying in the shop for a month, could not find the reason of underboost. After this video, got the right part ( only 130$ at dealers) installed. Now my sprinter lives a new life.

Your welcome. I hope to post more when I come across something interesting. 👍

I’m having boost issue & will check my water pump tomorrow 🙏🙏

I have a 2008 with the 3.0 V 6 turbo diesel...does it have the same valcum system as this van?

I have a question i did what you did and blocked off that little breather and its still not holding vacuum I hooked up the pump directly to the line going to that boost regular thing that you replaced and its not holding also if i unhook the wastegate from regulator and test it the wastegate is not holding vacuum not sure if it should

Dr soot, thanks. I have a P0234. I changed the water pump, all the transducers (3). Im about to check vacuum. This is the only code that wont go away. Im stuck in Texas because of this

I hope you can help mate , I have this engine 2.1 really haven't had any complicated problem till it passed 250k , running fine but when you carry heavy load and push it a little bit hard , then the (P02A7 cylinder 4 fuel trim at min ) this code had really exhausted me mate , I checked every thing I know ( checked if any vacuum leak using spry method to see if idle will change No sign , swapped injector 4 with injector 1 , still same ) as soon as you clear code will start just fine and until you go uphill or carry heavy load , the only thing am suspecting is o2 sensor have you experienced this kind of problem ?

Thanks for uploading the video very helpful. I wanted to clarify something at 4:15 you show the transducer that you replaced to fix the low pressure codes but then you mentioned boost pressure too high code came back. What was the fix high pressure codes? Are those two different transducers at 4:15 and 4:40

The dealer said I have leak on my 2015 2.1L no water showing so he must be talking about the vacuum. do you a video showing how to take the fan off?

Hi, I have a 2014 e250 blutec with what I believe the same motor. Car was running fine but mechanic found the water pump was leaking. Car has about 120k on it so I had it changed. Since then I had the p261f code show up but drove for about a week. I was driving and got a turbo code p0299 and p00c4. The brakes also went out and the red brake sign illuminated on the dash. Towed to dealer and they said I needed a new vacuum pump. They replaced that and upon pick up no codes but car felt sluggish at low rpm. Slowly after all the turbo codes returned and I still had the p261f also. Car feels like it pics up at higher rpm. But initial take off it falls on its face. Any ideas?

Thanks for this video! I got a P261F and also a p0218 code on my 2014 glk250. I noticed one day I was driving and the engine temp starting dropping a lot. Would a failure like this cause issues like this?

Do you have video on how to replace pressure regulator.

hello i am from france, i tried to maintain the vacuum and it does not hold the vacuum on the tank, do i have to change the vacuum tank or the water pump?? thanks thanks

Hi, when I installed the water pump on my sprinter 2015, the vacuum won't go in any direction, I removed the small rubber tube from the change over valve that goes to the water pump and I tried to blow air in and out and it doesn't go in either direction, I think the vacuum should go from the water pump to the change over valve. I need help about it, Thank you.

I have p261f code but no Leaks no damage I heard a sound like air but strong when it go to 1 to 2 shift and 3 shift may it is the vacuum the manifold was leaking it’s was Intek was leaking it was fix now is making air pressure sound Can be the vacuum?? Mercedes sprinter 2014 2.1 2500 ???

Hi would this cause sprinter to go into limp mode , mine will drive fine then goes into limp mode stop turn van off then sit for 5mins start and limp mode will be off

I have 2008 2.1 and I got the code p0243. Wastegate actuator A. Crazy thing is I found two of thise regulators under the hood. Shall it be one or two? I'm no mechanic and I'd appreciate any help

@Dr Soot. I have a 2015 Sprinter, 2500. 2.1L Motor and 172K. I just had the CEL come on, and it pulled the code P261F. That is the code for a "stuck" coolant change over valve I believe from the research i have done. I have not done or started any checks or vacuum tests yet, but wanted to get you advice on where to start. What should I change out. Do you think this is a water pump issue or vacuum change over valve issue

I'm so glad for this video! I have a question though... I have the same motor I think 4 cyl 2014. I can not pull a vacuum on the main line. If I block off the little air filter I can get a vacuum. Are you saying I need a new transducer? I feel the water pump is ok. No problems from that (that i know of).

I woulder if you can help me mate .. I have sprinter 2015 2.1 L , last week some codes triggered engine check light (p0087 = fuel pressure too low ) I changed the fuel filter and cleared the code .. three days later start giving me p0299 = turbocharger underboost , I did it idel with no issue .. but when you rev it won't go higher than 3000 RPM .. but I have noticed something quite interesting mate !! ( when you rev. the max can get to is 3000rpm but as soon as you press break pedal the rpm will go pass that 3000 .. ) I was looking online and came across your video mate and it could be am having that because the transducer faulty ? .. am gonna give a go anyway .. let me know if you have any advice ..

Great video. Its amazing how far a little help/knowledge gos, I really appreciate the information!! I'm working to solve P261F, coolant changeover valve blocked. I pulled the changeover valve and it looks like there is coolant residue in the line. What do you think about pulling the line between the changeover valve and water pump and plugging the nipple on the changeover valve until I have time to replace the water pump? I did that and am still getting the P261F code. Do you know if air has to flow back into the pump to allow the changeover valve to let go?

thats a nice vac pump, what brand is it or whered you buy it?

I get the error code P2263 Turbocharger Boost System performance from time to time, when downshifting a gear or running full throttle on the highway, can this also be caused by the components you mentioned?

No sir. The V-6s only ran the vacuum setup for the EGR bypass flap.

were's the volume

So I heard on 2.1 when the water pump fails it pulls coolant into vacoome system so maybe check valve and a vacuum pump needs replacing after a water pump fails?

Does the water pump act as the vacuum pump or does it just consume all the vacuum and cause the low boost code

I have a 2016 Mercedes sprinter 2500 3.0l diesel van just had the water pump replaced along with pullys ect about 2-3 weeks after van now is in limp mode no turbo boost getting obd2 code p0237 says boost pressure sensor. I can't find where this boost pressure sensor is located or If that sensor is my problem any help would be much appreciated

Great video, I have a problem with my Mercedes van. 13 plate. Basically the acceleration won’t go above 3000rpm and it dies going up any incline, top speed is fine when it gets there. Could this be the same sort of a problem? Many thanks

hi what is the part number ?

I am looking at buying a 2.1 sprinter is it a good choice or should I get 3.0 ???

So just tested both wastegates and small one holds vacuum no problem but the big one it’s actually called vacuum reservoir only holds about 4in is this normal?

I'm have a 2015 2.1. And have under boost issue while driving down road on the gas i can hear like a sucking noise and when i let off it goes away. It sounds like it's coming from top of engine on driver side. Any leads

Gonna go out on a limb and guess you work for Frito Lay

Is this for the p226c code!??

Anyone know the name of the part? Im grasping for straws over here before getting a new turbocharger.

I have a problem with my sprinter boost pressure too high what could cause this 2.1l