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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > N47 and N57 Turbodiesel Engine / Drivetrain / Exhaust Modifications > 244C00 Charging Pressure Too Low
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      11-02-2020, 12:22 AM   #23
jordyhulst
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Quote:
Originally Posted by zaynn786 View Post
Problem got fixed in April, and has returned with the same codes, charging pressure too low and EGP deviation. Changed pressure converter for one turbo wastegate, I suspect the other turbo is now exhibiting the same problem. Will update as I go
Did you fixed the problem again ?
I also had the problem on my F30 335D, i changed both vacuüm pressure converters. The problem was solved for a month, today in the morning it was back again. I suspect an faulty vacuüm hose.
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      11-02-2020, 12:27 PM   #24
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zaynn786
Any updates on the re-occurrence?
I have a 2011 335d with a very similar issue. Intermittent and usually at low throttle settings. I did a bunch of vacuum checks and everything was good but i replaced all the lines anyway. I have not changed the pressure converter yet but am seriously considering it given your post on 4/27/20.

One thing I am not certain of: what does line 11/13 do? with the down-pipe off I see that it opens a small port by the turbine. Strange thing on my car is that the linkage does not move when I put a vacuum on line 13, it does move if I give it a little nudge with my hand and it stays actuated (open) until I relieve the vacuum. I even tried it with the car running, thinking that the exhaust pressure would assist with the opening but it does not. Is this supposed to be open at normal vacuum (25inhg)?

Any info will help as I am still struggling to figure this out.
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      11-03-2020, 09:44 AM   #25
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Quote:
Originally Posted by zaynn786 View Post
Problem got fixed in April, and has returned with the same codes, charging pressure too low and EGP deviation. Changed pressure converter for one turbo wastegate, I suspect the other turbo is now exhibiting the same problem. Will update as I go
Any updates?
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      11-11-2020, 12:15 PM   #26
jordyhulst
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Quote:
Originally Posted by jordyhulst View Post
Quote:
Originally Posted by zaynn786 View Post
Problem got fixed in April, and has returned with the same codes, charging pressure too low and EGP deviation. Changed pressure converter for one turbo wastegate, I suspect the other turbo is now exhibiting the same problem. Will update as I go
Did you fixed the problem again ?
I also had the problem on my F30 335D, i changed both vacuüm pressure converters. The problem was solved for a month, today in the morning it was back again. I suspect an faulty vacuüm hose.
Fixed my car, the vacuüm hoses where bad.
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      03-17-2021, 11:48 AM   #27
zaynn786
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The vaccum hose was indeed the culprit the second time round.

TLR

Check vacuum pipes for any leaks, replace if old
Check pressure converters and test for proper functionality as sometimes can be too slow for the actuator
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      06-06-2021, 04:20 AM   #28
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Quote:
Originally Posted by zaynn786 View Post
Bimmerlink has updated its iOS app to show EGP before turbo which is helpful however i now have another code showing error for the actual EGP. Does anyone know what the calculated pressure should be?
I had the same issue on my 335d. I was repeatedly told by the BMW independents that the small turbo was no good.

I bought myself a vacuum gauge and decided to test the vacuum circuit. I found the fault to be the pressure converted that feeds exhaust flap in the large turbo (blue hose). The flap would not close fully when you start the car so the exhaust gasses would not fully spin the small turbo.

Changed the pressure converter and is like a rocket......
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      12-13-2022, 10:51 AM   #29
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Quote:
Originally Posted by zaynn786 View Post
Problem got fixed in April, and has returned with the same codes, charging pressure too low and EGP deviation. Changed pressure converter for one turbo wastegate, I suspect the other turbo is now exhibiting the same problem. Will update as I go
Any update on this issue? I'm getting what seems to be the same problem...
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      12-13-2022, 11:05 AM   #30
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Quote:
Originally Posted by OpDawg View Post
Any update on this issue? I'm getting what seems to be the same problem...
Post your codes
Also which exact vehicle do you have?

If you have boost pressure deviation, you would need to do a thorough inspection of the post turbo intake tract and run a pressurized smoke test to identify the leaks.
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      12-15-2022, 10:10 PM   #31
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Quote:
Originally Posted by OpDawg View Post
Any update on this issue? I'm getting what seems to be the same problem...
I got this same code and there is a tsb for the turbo actuator rod clips. Easy place to start.

https://f30.bimmerpost.com/forums/sh...php?p=29174572
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      01-15-2023, 05:27 AM   #32
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I had this issue and after multiple visits to multiple ‘specialists’ who kept saying change the small turbo, I found one who did a proper inspection and found the vacuum lines to the pressure converters were fu**ed. Got them replaced and also changed both pressure converters and the car is running much better now and error hasn’t returned
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      06-19-2023, 06:50 AM   #33
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Hi guys, got the same symptoms as you all and the exact same code, but on a N57 530d single turbo. Could y'all share a part code for that converter? Is it this one by any chance 11747810831? Thanks. And where would it be located? Hard to change at home? Thanks
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      06-19-2023, 07:14 AM   #34
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Quote:
Originally Posted by leonardgabriel07 View Post
Hi guys, got the same symptoms as you all and the exact same code, but on a N57 530d single turbo. Could y'all share a part code for that converter? Is it this one by any chance 11747810831? Thanks. And where would it be located? Hard to change at home? Thanks
That does look like the right part. From what I can remembers, it’s located in a pretty awkward position. I know you have to take quite a few bits out to get easier access. Someone can correct me if I’m wrong but intake manifold needs to be removed, and it’s a pretty tight squeeze to get to the converter without removing the turbo. Before you replace the converter, may be worth checking the vacuum lines first as that’s what controls the converter
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      06-19-2023, 07:17 AM   #35
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Quote:
Originally Posted by zaynn786 View Post
That does look like the right part. From what I can remembers, it’s located in a pretty awkward position. I know you have to take quite a few bits out to get easier access. Someone can correct me if I’m wrong but intake manifold needs to be removed, and it’s a pretty tight squeeze to get to the converter without removing the turbo. Before you replace the converter, may be worth checking the vacuum lines first as that’s what controls the converter
Thanks for the info. Have found one close to me I'll collect later today, car is going to mechanic tomorrow so will most probably leave it to him to change it. Any idea where vacuum lines are running around so I can maybe take a look? are they all in awkward positions just like this valve or are they easy to see in the bay? Thanks
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      06-20-2023, 12:11 PM   #36
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Quote:
Originally Posted by zaynn786 View Post
That does look like the right part. From what I can remembers, it’s located in a pretty awkward position. I know you have to take quite a few bits out to get easier access. Someone can correct me if I’m wrong but intake manifold needs to be removed, and it’s a pretty tight squeeze to get to the converter without removing the turbo. Before you replace the converter, may be worth checking the vacuum lines first as that’s what controls the converter
changed the converter and still have the same issue unfortunately, mechanic said lines were fine and nothing looking out of place. however there is sound coming when accelerating and car is hesitating sounds like a ticking or like the sort of sound an ATM makes when counting money(crrr) to describe it. really at a loss of words and ideas here and would appreciate everything
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      08-21-2023, 11:11 AM   #37
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Hi. I have a 535D with exactly this issue. I had my engine rebuilt after a chain guide broke apart, got into the oil pump and starved the engine and turbos of oil. Since the rebuild, I've been having this 244C00 code coming up with exactly the same symptoms. The garage who rebuilt my engine are very far from me and I can't keep going backwards and forwards up and down the country to have this investigated. When I went there last week for this issue, they said to me something along the lines of the vacuum lines to the turbos also go to the engine mounts and they suspected the engine mounts to be at fault. They coded the engine mounts off the car but the error persists. They did a smoke test on the hoses and they all seem fine. Any help would be appreciated.
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      01-12-2024, 05:26 AM   #38
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Quote:
Originally Posted by zaynn786 View Post
Thanks for your help - I managed to get it sorted. It was the pressure converter for the turbo bypass valve. Was not functioning correctly so boost pressure was leaking through this and in turn would not hit the desired exhaust pressure either.
Hi, was this easy to change? I have the exact same fault on a 2017 335d, do you have a part number.
Many Thanks Gary
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