Golf mk6 limp mode

[Xzashx]

Hello,I have a golf mk6 1.4 tsi 122ps it hasnt got alot of miles on it but its come up with the fault code p0234 turbo overboost condition. I have got the wastegate cleaned as it was a bit sticky and it was alright for a few days, but then the issue had occured. The car goes into limp mode and stays like that and only resets after its turned on and off again. I did add redex aswell through the petrol cap to clean the system and it doesnt seem to have helped. I dont know wether there is any fixes or if i have to just replace the turbo. Does anyone have any idea?

[Keithuk]

VAG Error Code: 16618/000564

EOBD II Error Code: P0234

Fault Location:
Boost Pressure Regulation - Limit Exceeded (Overboost Condition)

Possible Cause:
Malfunction Indicator Lamp (MIL)(K83) active.
Boost Pressure too high.
Reduced Power Output.

Hoses incorrectly connected, disconnected, blocked or leaking.
Solenoid Valve for Boost Pressure Control (N75) faulty.
Manifold Pressure/Boost Sensor (G31) faulty.
Turbocharger stuck/faulty.
Exhaust Gas Recirculation (EGR) Valve blocked.

Possible Solutions:
Check Charge Pressure Control System.
Read Measuring Value Blocks (MVB).
Perform Output Test (to check the Turbocharger).
Perform Basic Setting (to check the Charge Pressure Control).
Difference of set value boost pressure vs. altitude sensor signal > 200 - 1275 hPa.
Perform Pressure Test to locate Leaks.
Check/Replace Solenoid Valve for Boost Pressure Control (N75).
Check/Replace Manifold Pressure/Boost Sensor (G31).
Check/Replace Turbocharger.
Check and clean Exhaust Gas Recirculation (EGR) Valve.

Description:
The boost pressure sensor responds to pressure changes in the intake manifold. This pressure is created by the turbocharger and changes with accelerator pedal position and engine speed. The Engine Control Module (ECM) uses this information to assist in diagnosis of the barometric pressure (BARO) sensor and to provide engine overboost protection. The boost pressure sensor has a 5-volt reference circuit, a low reference circuit, and a signal circuit. The Engine Control Module (ECM) supplies 5 volts to the boost pressure sensor on the 5-volt reference 2 circuit, and provides a ground on a low reference circuit. The boost pressure sensor provides a signal to the Engine Control Module (ECM) on a signal circuit relative to the pressure changes. The Engine Control Module (ECM) monitors the boost pressure sensor signal for voltage outside of the normal range. The Engine Control Module (ECM) calculates a predicted value for the boost pressure sensor. The Engine Control Module (ECM) then compares the predicted value to the actual signal.


As taken from my new EOBD II Error Codes