Bought car cheaply with problem already there

This code is common. Usually the turbo vanes stick in the down position (builds boost quickly).

The way that the ECM protects the engine from too much boost, is by cutting fuel (power loss).
Once the key is turned off and on, the boost comes back until the next over boost.

Thomas

Did you find the video?

If the "bypass regulator valve" (vacuum solenoid) is always OPEN, then the turbo vanes will always be in the Fast Boost setting. Similar to being stuck down.

Thomas

This fault can be intermittent even when the vanes are stuck... simply because it is all dependent on driving habit / style.

A gentle cruise through the city with frequent stops may never trigger this fault, where as a steep hill will trigger the
fault code quickly.

There are many Mechanics who are just not familiar with the way your TDi works... if your Mechanic is familiar with
VW TDi engines, then I will not question his troubleshooting process & conclusions.

A simple check is to see where the Vane Actuator Rod / Lever is sitting when the engine is OFF. If the rod / lever
is in the down position, then the vanes are stuck. I have uploaded a new video today showing rod and link movement
while the engine is running.

Get your mechanic to check this operation... if the movement is the same as in my video, then the vanes are fine and
the problem is something else:

http://www.youtube.com/watch?v=01pOfg5rJEQ

After only seven months it could be that the turbo vanes are already stuck... or the intake manifold and EGR Valve are full
of carbon build-up.

I can free-up vanes between 15min to 1/2hr.... in severe cases where the turbo needs to be removed, labor can be more
than 4 hrs.

To find a qualified garage, have a look here: http://autorepair.iatn.net/ enter your location on the left and see if a VW
Specialty Shop comes up.

Thomas

If you are in Europe, then the Turbo Design / Layout might be different than in the North American Video Sample that I provided
but the operation is the same.

Thomas

Have him watch the videos:

http://www.youtube.com/watch?v=uK9dFNS-ddM

http://www.youtube.com/watch?v=01pOfg5rJEQ

The best (but expensive) way to clean off the carbon, is to remove the turbo and disassemble / clean it.

I have had good luck with the above procedure (physically move the turbo vane rod while the engine is running) to free up the vanes.

I have had one customer who came back after one week with same issue... I believe I did not work the vanes back / forth long enough
and that is why he came back. Others have been fine for a couple of years.

Getting the turbo hot for an extended period of time with higher rpms (highway driving) can burn off carbon as well.

My method gives me an immediate visual verification that the vanes are free and that the code should not come back... a 5 to 10min test
drive after the repair (with scan tool attached) can confirm if boost pressure control is once again restored.

If he does not have success or if he thinks that this is not appropriate, then follow his suggestions, since I do not have the car in front
of me and can not confirm my initial thoughts.

Thomas