Intake Manifold Pressure Differential Regulation

Hello everyone,

SHARAN TDI 110 HP, manufactured in 1997:
After experiencing the emergency program mode several times recently...
After I drove it, I read the error codes.

00575 - Intake manifold pressure, control differential.

The error has not occurred again in the past few weeks.
After a test drive, I read the following measurement values.

Does anyone have any idea if these values are okay?

Thank you and best regards,
Peter.


Engine - Boost pressure, Boost pressure, Duty cycle.
speed (target) (actual)

/min mbar mbar %
840 969 1000 37.4
840 969 1000 37.5
840 969 1000 37.6
840 969 1000 37.7
840 969 1000 37.8
1050 979 979 37.9
1911 1091 989 38.6
1848 1897 1030 37.9
2016 1948 1275 48.2
2268 1948 1703 63.0
2541 1948 2142 68.5
2835 1948 2336 73.3
2352 989 1754 55.4
1932 1948 1408 41.0
2058 1948 1612 50.6
2205 1948 1867 57.0
2331 1948 2050 57.4
2457 1948 2183 62.6
2583 1948 2244 65.7
2709 1948 2152 60.2
2793 1856 1938 63.0
2856 1550 1601 39.8
2940 1734 1775 83.7
2961 1367 1408 49.4
3003 1530 1448 63.4
3024 1540 1581 56.6
3087 1918 1510 39.8
3150 1948 1969 64.1
3255 1948 2254 70.1
3360 1948 2285 70.1
3465 1948 1877 61.0
3591 1948 1754 60.2
3696 1948 1775 59.0
3822 1948 1846 57.4
3906 1948 1907 57.4
4011 1948 1958 57.8
4116 1928 1989 58.2
4200 1918 1969 59.4
3885 1948 1438 39.8
2940 1948 1928 63.4
2982 1948 2244 66.5
3045 1948 2213 64.9
3108 1948 1907 57.4
3171 1948 1795 58.2
3234 1948 1816 56.2
3297 1948 1877 56.2

The problem might (again) be with the control valve for the mass airflow sensor. Have you checked that already?
There are already several threads on this topic, and they describe the exact problems that occur if it's really an LMM (Low Mass Molybdenum) issue (such as a decrease in performance at higher speeds, etc.).

Best regards, Alex.
Please provide the German text you would like me to translate into English.
G3 AHU.

Hello,

The error database contains the target values and the conditions that must be met.

AMB1980 wrote:

The error might (again) be due to the control valve for the mass airflow sensor; have you checked that already?

What is that supposed to mean? Before you post nonsense, it's better to refrain from doing so, okay?

Best regards, Rainer.

Hello everyone,

All values are within the target range, and the operating conditions are also correct (3rd gear, full throttle uphill, 3000 RPM).

I have also checked the vacuum sensor of the VTG (using a syringe) and everything seems to be fine.

Probably, the only thing to do is wait and see if the error occurs again, right?

Best regards,

Peter[/img]

@Rainer: Sorry, I really mixed things up, and the wording was also unclear !