Doku V6 TDI AKE/AYM - Jerking and Lack of Power (Solution)

V6 TDI engine, AKE/AYM type.
Vehicle is jerking or experiencing a loss of power.
Memory error code: 00550

The vehicle is jerking or experiencing a loss of power while driving. Error -
Error code 00550 (injection start control) is stored in the engine control unit's memory.
control unit. Submersible pump in the tank is not functioning.

Solution:
The A4 (type 8E) has a pre-lift pump installed in the fuel tank, which...
It transports the fuel from the tank to the fuel injection pump. If this...
"If the pump fails, the distribution pump must take over the entire suction capacity."
to use up the fuel from the tank. In connection with the...
Increased flow resistance caused by the faulty pre-feed pump can...
The distribution pump can no longer handle this load and will therefore...
Unfortunately, it was already damaged. The consequence is that error 00550 occurred.
is saved. To avoid incorrectly diagnosing the fuel injection pump as faulty...
to renew, it is absolutely necessary in this case that...
a check of the pre-charge pump is being performed.
The pre-charge pump can be tested using the actuator diagnosis function (requires a diagnostic tool).

If the pre-charge pump is defective, it should be replaced.
After that, the injection pump's injection timing needs to be checked.