AFN: Emergency mode during high ambient temperatures

Hello everyone,

It's that time again: every year during the hot days.
Does the 110 HP TDI AFN engine, manufactured in 1997 with 75,000 km, cause the Sharan to go into limp mode?
This time, I borrowed a VAGCom laptop.

Error is standard deviation.

00575 - Intake Manifold Pressure
17-10 - Control Difference - Intermittent

I have the feeling that the performance has also declined.
What do you think about the values below?
In my opinion, the turbocharger isn't producing enough boost, is that right?
Shouldn't the target pressure be reached much faster?
The values were measured at full throttle in third gear, on a slight incline.
I have already checked the VTG (presumably referring to a specific type of coupling or connector) for ease of movement.

EngSpeed SpecMAP ActMAP Duty cycle Throttle Position
TIME 861-945 Pressure Pressure Boost Valve
STAMP /min mbar mbar % %
0.01 1617 1428 1102 34.3 80.4
1.47 2037 1948 1234 41.0 100.0
2.94 2625 1948 1459 41.0 100.0
4.42 3318 1948 1765 41.4 100.0
5.89 4032 1938 1979 42.6 18.8
7.36 2772 1948 1255 43.8 100.0
8.83 2961 1948 1581 41.4 100.0
10.30 3213 1948 1816 41.0 100.0
11.78 3507 1948 1948 40.2 100.0
13.25 3780 1948 1969 41.8 100.0
14.72 3696 1061 1499 59.8 0.0
16.19 1218 979 1040 34.7 0.0
17.67 819 989 1020 24.7 0.0
80.97 3402 1785 1234 39.8 46.7
82.44 2877 1948 1163 39.8 71.8
83.91 3276 1948 1581 43.0 100.0
85.38 4011 1948 1938 43.0 100.0
86.86 4389 1112 1816 59.8 100.0
88.33 3045 1948 1448 43.4 91.4
89.80 2898 1020 1030 59.0 0.0
91.27 2625 1010 979 57.4 0.0
92.74 2352 1000 989 55.4 0.0
94.22 2373 1948 1142 42.2 100.0
95.69 2583 1948 1397 42.6 100.0
97.16 2898 1948 1663 41.0 100.0
98.63 3255 1948 1887 40.6 100.0
100.10 3612 1948 1989 41.8 100.0
101.58 3927 1948 1969 43.0 100.0
103.05 3675 1051 1663 59.8 100.0
104.52 2709 1010 1010 57.8 20.0
105.99 2541 1000 989 56.6 0.0
114.83 2142 979 1000 52.2 100.0
116.30 2163 1948 1153 40.6 100.0
117.77 2310 1948 1316 42.2 100.0
119.24 2583 1948 1561 41.4 100.0
120.71 2919 1948 1805 40.6 100.0
122.19 3297 1948 1969 41.8 100.0
123.66 3696 1948 1989 43.4 0.0
125.13 2478 1000 1030 56.2 0.0


Thank you and best regards,

Peter.

So, regarding the data, the turbocharger boost pressure just couldn't get up to speed.
Are there any leaks in the connection from the solenoid valve to the actuator and the rest of the system?

Perform an actuator diagnosis and observe the VTG (Variable Turbine Geometry) - is there any activity at all?

Perhaps the membrane in the VTG container has ruptured, or, as mentioned, there may be a leak in the control system.

If the VTG (Variable Turbine Geometry) is still functioning, you can even hear the difference between zero and full boost pressure at idle!

m;