P0299 - Boost Pressure Regulation

[VWCade]

So, I keep getting this code and I’ve been diagnosing it for weeks on end now. Yes, I’ve taken it to a ‘vw specialist’ but they said the N75 Aka solenoid valve needs replacing. Which I have done with a genuine VW one. (Didn’t Work)

The list below is everything I’ve done so far. Can anyone please advise my on what I may have missed out on ? Or another suggestion? Cheers

Boost pipe, vacuum lines, main head leak tests x 2
Exhaust manifold swap
Check actuator holds pressure
Leak test from intercooler up to exhaust manifold
Turbo carbon clean (remove sticky veins)
Checked EGR Delete kit is on correctly
ECU Flashed
New MAP sensor
New N75
Check for air leaks from dpf (dpf deleted)

[the swan fiend]

Do you have the results of an auto scan you could post up? One of the experts will be able to interpret it and advise more.


Sent from my iPhone using Tapatalk

[Scoobysrt]

Year of van and engine size?

Is the actuator arm free, corroded or bent?
Have you added a boost gauge or dump valve?

[VWCade]

Hi I will get the results soon as I can. I have got a boost gauge that’s correct. Its connect to the blanking plate that is on the intake manifold.
Engine size 1600
Year of Van 2011
Yes the actuator arm is fine and holding pressure

[VWCade]

1 Fault Found:
7384 - Boost Pressure Regulation
P0299 00 [096] - Control Range Not Reached
Intermittent - Not Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 1
Mileage: 246262 km
Date: 2117.14.30
Time: 16:44:32
Engine RPM: 2256.00 /min
Normed load value: 97.3 %
Normed load value: 97.3 %
Vehicle speed: 109 km/h
Coolant temperature: 89 °C
Intake air temperature: 26 °C
Ambient air pressure: 1010 mbar
Voltage terminal 30: 14.118 V
Unlearning counter according OBD:39
Charge air pressure: specified value-MAP SP MMV: 2433.30 hPa
Charge air pressure: actual value-MAP MMV: 1953.45 hPa
Air mass: actual value (mg/stroke)-MAF _MES: 784.059 mg/stroke
Air mass: specified value-MAF _SP _MMV: 813.90 mg/stroke
EGR Vacuum Regulator Solen. val.: activation-ANG_ SP_EGRV[0]: 7.001 %
Throttle actuator commanded value-ANG SP THRI01: 96.001 %
Charge Pressure Actuator: activation-ANG SP BPAI01: 83.691 %

[VWCade]

auto scan - summarised go fault codes only

Address 01: Engine (J623-CAYD)
Labels:
. 03L-906-023-CAY.clb
Part No SW: 03L 906 023 DB
HW: 03L 907 425 C
Component: 1,61 R4 CR td H43 7210
Revision:
Serial number: 00000000000000
Coding: 00114010032500080000
Shop #: W5C 35110 790 50316
ASAM Dataset: EV ECM16TDI02103L906023DB 003002
ROD: EV ECM16TDI02103L997557.rod
VCID:69D3E0668879EBCCB5-8030
2 Faults Found:
7384 - Boost Pressure Regulation
P0299 00 [096]
- Control Range Not Reached
Intermittent - Not Confirmed
- Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 1
Mileage: 246262 km
Date: 2021.10.06
Time: 16:44:32

View Help
Engine RPM: 2256.00 /min
Normed load value: 97.3 '
Vehicle speed: 109 km/h
Coolant temperature: 89
°C
Intake air temperature: 26 °C
Ambient air pressure: 1010 mbar
Voltage terminal 30: 14.118 V
Unlearning counter according OBD: 39
Charge air pressure: specified value-MAP SP MMV: 2433.30 hPa
Charge air pressure: actual value-MAP MMV: 1953.45 hPa
Air mass: actual value (mg/stroke)-MAF MES: 784.059 mg/stroke
Air mass: specified value-MAF SP MMV: 813.90 mg/stroke
EGR Vacuum Regulator Solen.val.: activation-ANG SP EGRV[0]: 7.001 %
Throttle actuator commanded value-ANG SP THR[0]: 96.001 %
Charge Pressure Actuator: activation-ANG SP BPA[0]: 83.691 %

7396
Boost Pressure Regulation
P154F 00 [039]
Malfunction
Not Confirmed
Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 1
Mileage: 246313 km
Date:
2021.10.07
Time:
10:35:09

Engine RPM: 1500.75 /min
Normed load value: 7.1 %
Vehicle speed: 0 km/h
Coolant temperature: 66 °C
Intake air temperature: 31
°C
Ambient air pressure: 1010 mbar
Voltage terminal 30: 14.231 V
Unlearning counter according OBD: 40
Charge air pressure: specified value-MAP SP MMV: 991.44 hPa
Charge air pressure actuator: acknowledgment-ANG BPA[0]: 5.023 %
Air mass: actual value (mg/stroke)-MAF MES: 415.884 mg/stroke
Air mass: specified value-MAF SP MMV: 411.90 mg/stroke
EGR Vacuum Regulator Solen.val.: activation-ANG SP EGRV[0]: 0.000 %
Throttle actuator commanded value-ANG SP THRI0]: 95.000 %
Charge Pressure Actuator: activation-ANG SP BPAT01: 5.000 %

Address 19: CAN Gateway
Labels:. 7N0-907-530-V1.clb
Part No SW: 7N0 907 530
HW: 1K0 907 951
Component: 3533 Gateway
H27 5603
Revision:
H27
Serial number: 260910F2001501
Coding: E9801F0200020200007401
Shop #: WSC 35110 377 00160
VID: 6DDB94767491F7ECD9-8038
padiness
3 Faults Found:
01305
- Databus for Infotainment
004 - No Signal/Communication
- Intermittent
Freeze Frame:
Fault Status: 00100100
Fault Priority: 1
Fault Frequency: 47
Reset counter: 82
Mileage: 245897 km
Time Indication: 0
Date: 2016.02.21
Time: 10:36:04
00469
- Infotainment Databus in Single Wire Operation
011 - Open Circuit
- Intermittent
Freeze Frame:
Fault Status: 00101011
Fault Priority:
3
Fault Frequency:
4
Reset counter: 80
Mileage: 246195 km
Time Indication: 0
Date: 2016.02.26
Time: 10:50:27

01304 - Radio
004
- No Signal/Communication
Freeze Frame:
Fault Status: 00100100
Fault Priority: 2
Fault Frequency: 51
Reset counter: 82
Mileage: 245897 km
Time Indication: 0
Date: 2016.02.21
Time: 10:26:14
- Intermittent

[Doc]

Is this intermittent or does it happen every time you try to boot it?

[VWCade]

Happens at any point. I could start driving and the boost isn’t coming in at all. Or I can be doing 70 on the motorway in cruise control then limp mode will kick in

[MillerTime]

I would check boost pressure whilst driving the van, required vs actual using vcds measuring blocks

[Doc]

Intermittent faults like this will always be difficult to nail down.
If you are getting performance on minute and not the next it sounds to me like something other that the major mechanical parts. Mechanical parts don't tend to fail and put themselves right again whereas sensors ect can act up.

As suggested, try get a VCDS log of a clean pull, 4th gear from a low speed/RPM right through to 3000RPM or more.
Requested (specified) boost Vs actual boost will tell you a lot about what's going on.
Log pedal position and n75 duty cycle also to prove or disprove those are the fault.

[VWCade]

Update:
The EGR Delete that was done had the vacuum pipe on the wrong nipple.
The top nipple on the EGR solenoid valve had no pipe on it which it should have done. The pipe was actually on the second nipple (not the first) The second nipples purpose is to draw in air from the EGR itself (I believe) and the top one feeds back into the turbo. Now the second nipple is blanked as dark side requested. Instant change on turbo pressure requested vs actual. It was now reading 1500kps instead of 1000kps at idle. Reversed out my drive and the engine cut out. It read “Internal control module P0606 - processor fault” meaning an ecu fault? I cleared codes and began driving. No problems after that and was boosting better than ever…. On comes today and I did a re test on VCDS on air pressure control. Results were “system not okay” hopes starting to drop again… Done a test drive with Requested boost VS Actual boost. At one point it read 2000 from requested and 1400 from actual boost.
My current thoughts are; has the turbo been over compensating meaning over boosting to get the boost it wants but couldn’t get? And in turn now the turbo is damaged? Or am I overthinking it? FYI my boost issue has been going on since August. Thanks for reading

[Triggytriggster]

Hi guys,
completely off-topic here but won't let me start a new thread as I'm new.

I have a 1.6tdi 2015 CAYM. It's been running rough and I put a new MAF sensor on and that seemed to make it run so much better for a week or so. now its running bad again. it's over-boosting (I'm going to check N75 and actuator tomorrow) but it also jolts and judders when moving and I'm only slightly pressing the throttle. I've done some logs and can't find much out of the ordinary apart from the over boost, however, I did notice that the accelerator pedal position sits at 14% when not pressed and only goes up to 69.8% when I fully depress it... has anyone else had this issue? i was told but a tuner friend of mine that it's probably nothing but to me it seems odd. could this be why the van is juddering as it's not sure exactly how much you're depressing the accelerator?
I have an Autel so I can do most logs diagnostics and functions/tests.

Any help would be greatly appreciated it's driving me mad that I can't find out what it is.
Replaced MAF sensor with genuine Continental one as the hella one I got made it worse.
TIA.
Dan