Charge Pressure Control: Positive Deviation

[luceberg]

I am trying to solve a problem with a 2002 Golf 1.9 PD 100. It goes into limp mode during any trip, even when driven carefully. When I stop, the limp mode resets.
I get the following fault code:

17965 - Charge Pressure Control: Positive Deviation

P1557 - 35-10 - - - Intermittent

Things I have done so far are:

Change the vacuum lines for silicone.
Tested turbo actuator for for leak with mityvac.
Do the Mr.Muscle turbo clean.
Changed the MAF Meter. I found the actual air flow in Vagcom was staying the same at about 450 whatever was requested. When I changed it, the result was the same.
Tested suction on N75.

It is possible that the turbo is still stuck, as the movement on the actuator was about 1/2", not sure if that is enough.

Any ideas as to what is going on?

 

[scurvy]

Absolutely could still be stuck vanes. Exercise the actuator and make sure it moves freely, then check when it starts to move and reaches full excursion.

 

[luceberg]

I just checked the movement on the actuator. It is moving about 8-10mm. There is a lot of spring resistance.