Audi 3.0 TDI: No Power, No Limp Home - New MAF Sensor

Hello everyone,

For about 4 weeks now, I've been experiencing a significant loss of power in my car. It feels like the engine only has about 90 horsepower.

Vehicle data:
Audi A5 3.0 TDI Quattro, 176 kW / 239 hp.
Engine code: CCWA.
DPF and EGR deactivated (for approximately 30,000 km).
Injectors, new (approximately 30,000 km).
Turbocharger, new (approximately 40,000 km).

The engine starts immediately without any problems, whether it's a cold start or a warm start.
Furthermore, the engine runs very smoothly, without any jerking or misfires.
The exhaust emissions are also normal and show no abnormalities.

Using VCDS, the values for exhaust gas temperature, air mass, and boost pressure were checked both at idle and during a test drive.
The planned and actual values were in agreement.
(previously, the LMM was defective and has already been replaced).
What was observed is that the target boost pressure was specified as 0.6 bar, and the turbocharger delivered this boost pressure, as indicated by the boost pressure sensor.
However, the boost pressure should be significantly higher, I think somewhere between 1.4 and 1.8 bar.
The strange thing is that the vehicle doesn't go into emergency mode.


Only one error is stored in the error memory:
Valve for engine mount, defective, code N144.


I'm a bit puzzled... what could be the reason why the engine control unit is only outputting a target boost pressure of 0.6 bar?
I suspect that the engine mount is causing this issue (which reappears immediately after being cleared), and that this is causing the engine control unit to reduce the turbocharger boost pressure.
But if that were the case, shouldn't it go into emergency mode...?


Thank you for your help.

Greetings.
ZET

ZET wrote:

DPF and EGR deactivated (for approximately 30,000 km). Injectors, new (approximately 30,000 km). Turbocharger, new (approximately 40,000 km).

Tell us more about it, but let's do a quick scan first.

Measurements of LD values under static conditions are not very informative.


Edit solution for a similar case:
Okay, I'm ready. Please provide the German text you want me to translate.

Thank you for your reply.
I will provide the Autoscan data as soon as possible.
I unfortunately don't have VCDS myself .