runs fine, no smoke, but no power

[Patriarch]

I have a 2005 TDi Passat wagon with 321K (about 130K on a factory new engine) replaced because of the oil pump chain breaking and mangling the valves etc. My mechanic at the time replaced the turbocharger also. While driving yesterday I experienced a loss of power. I didn't notice any new noises, and there was no smoke. I was able to drive it home (about 100 miles) it even got up to highway speeds though it took awhile. I checked the turbo hoses they seemed ok and I could hear no air leaks. It starts up fine and runs fine it just has no power. Also I needed to add water on the way home, though I think this is unrelated. Also the emission service and the curly (glow plug?) light is on. has the following codes: P0245, P2102, P2100, and P0741. I think the most likely is the P0245- Turbo Waste gate A solenoid low. not sure what or where that is. 6/9 I found the vacuum activated solenoid and the hose was off, put it back on , no change. Any ideas? thank you in advance, Patriarch

 

[Scubanero]

Sounds like turbo limp mode, most likely caused by an air leak somewhere between the turbo outlet and intake manifold. Second most likely is a problem with the turbo actuator, most likely in that category is a vacuum leak between the control relay and actuator. There is lots of discussion of both of these in this forum. Just search.
I have had a number of air leak/limp mode episodes and only once did I hear an air leak.

 

[DonL]

Sounds just like mine with a bad turbo. I had the turbo replaced the right way and it has been fine for a year now. Only go to a certified TDI guru.