N75 issue?

[slepy]

Hi all.

I have some running issues with my leon 2.0 tdi 170 PD. It is difficult to accellerate smoothly in 1st and 2nd gear and overall car feels "jerky. Couple of days ago it went to limp mode when I floored it. Scanned it with vcds and it has an error

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Address 01: Engine Labels: 03G-906-018-BMN.clb
Part No SW: 03G 906 018 DT HW: 03G 906 018 DT
Component: R4 2.0l PPD1.2 G 0431
Revision: --H42--- Serial number: SEZ7Z0G3824196
Coding: 0050072
Shop #: WSC 04941 785 00200
VCID: 7AF103AB357F40C86EF


1 Fault Found:
000665 - Boost Pressure Regulation
P0299 - 006 - Control Range Not Reached - Intermittent
Freeze Frame:
Fault Status: 00000001
Fault Priority: 5
Fault Frequency: 1
Reset counter: 39
Date: 2000.00.00
Time: 05:44:48


Freeze Frame:
RPM: 2944 /min
Torque: 344.0 Nm
Speed: 101.0 km/h
92.04 %
Voltage: 14.46 V
Pressure: 2449.5 mbar
Pressure: 1959.6 mbar


Readiness: N/A



I checked all the hoses going from/to N75 valve and cant find anything wrong with them. Pressure actuator seems to move smoothly enough as well. I also did run a test with vcds on the n75 output.
Does anyone know what values should it read? Shouldn't N75 make a clicking noise during the test?
Anything else I should check?

 

[@udi A3]

Saw the same fault code today on a 2007 A4, but it wasnt picking up fast, turbo pressure wasnt making the requested untill late up in the rev range.
Going to try the N75 and possibly map sensor.

 

[slepy]

That's the thing, mine doesn't lack any power. It still goes well but the issue is when you accelerate smoothly especially noticeable in first and 2nd gear. Do you think it might be inlet manifold actuator related? Been going through loads of forums with similar issues and it seems it does help in some cases. I can see some "oil" on the actuator rod itself but not sure how else I can check if it works properly. It isn't easy to get to it and although actuator itself is just few quid, it will be a manifold off job to change it. I would at the same time clean the EGR valve though.

 

[@udi A3]

Not sure about your fault symptoms, but N75 replaced and no more faults for me

 

[slepy]

Ehh. I will clean the egr, replace the actuator and see if it helps. If not, n75 will be next. ****** cars!