Audi A6 1.9TDI 130 BHP AWX 2001 - Loose power at higher speed, Code 17964Archived Message
Posted by Jas on March 15, 2006, 2:15 pm
I have this Audi A6 when you drive normally it is ok, but when you drive it harsh it gets to about 80mph then loses power. If you switch the ignition off then back on its ok for a bit. The fault that comes up is 17964 Turbocharger Pressure - Control Limit not reached.
I have checked all vacuum pipes there are no splits all connected ok. replace the charge pressure control valve, replace the MAP sensor, It has had a new Air Mass Meter, Looking at live data every thing seem ok, the boast is reaching about 2150 mbar.
There is slight play in the turbo fans.
The only thing i can now think it being is the Turbo itself.