Assistance needed with R56 2885 Deviation

[KnightNewscast]

The R56 N14 engine had a refurbishment, which included the installation of a new turbocharger, diverter valve, intercooler, and vacuum pump.

Is it accurate to say that code 2885 indicates overboost and code 2884 indicates underboost?

I have inspected all the vacuum pipes leading to the chamber, solenoid vacuum pump and waste gate actuator.

Everything seems to be in order.

Furthermore, there are no instances of charge side leakage.

While driving the vehicle, the boost engages and it performs well when subjected to high engine speeds and load, without any error messages being shown.

Once I reach a level or sloping surface at a speed of 70mph, using either the 5th or 6th gear, with the accelerator fully pressed down to increase the engine's revolutions per minute (RPM), the warning light labelled "2885" illuminates along with the half power indicator. However, it is evident that the vehicle still experiences a boost despite the warning light being on.

I believe that the charge piping is in excellent condition based on my assessment. The turbo, diverter and vacuum pump have all been replaced with new components. The vacuum flow through the chamber is functioning properly, as shown by the release of pressure when the piping on the pump side is removed while the solenoid is closed. The solenoid is opening and boost is being generated.

Indeed, the only remaining task, provided my assumption is correct, is to make the necessary modification to the wastegate actuator. The throw lengths listed range from 8mm to 18mm, although I have seen variations in these measurements.

I have observed that the turbos included in the R56 model exhibit a wide range of variations in their throws, which has left me feeling perplexed.

Furthermore, in the context of MBAR, what is the intended magnitude of the boost pressure? What is the specific condition that would cause an over boost if the code is 2885?

The barometric pressure, as shown by my reader, is around 1200 millibars.

Any further perspectives or observations would be much welcomed.

[Shmoein]

I have previously experienced a PCV valve failure in my Rover, which resulted in various malfunctions. In a turbocharged car, the boost level is regulated by map sensors located both before and within the inlet manifold. When examining live data, you should observe two pressure figures: the actual pressure and the desired pressure. If these figures do not align, it indicates an improper amount of pressure at incorrect intervals. To begin troubleshooting, I recommend conducting a smoke test to identify any potential leaks.

[KnightNewscast]

Upon observing the 2885 code throughout a run, it seems that there is a variance of around 600mbar.

This phenomenon occurs only when one's foot is firmly placed and the revolutions per minute (RPM) are gradually increasing.

When driving at a fast speed with high engine revolutions and maximum turbocharger pressure, the error indicator will not activate whatsoever.

[KnightNewscast]

In addition, I have attempted to use a spare rocker cover and positive crankcase ventilation (PCV) system that is known to be in excellent condition, but it did not alter the observed behaviour.

[KnightNewscast]

Furthermore, if the real value is low, why is it producing a result of 2885 instead of 2884? This discrepancy seems to contradict the expected order.

[Shmoein]

When the boost is increased, it is possible for air to leak on the boost side. To check for this, a smoke tester is required to inspect the pipes. The diverter valve may be stuck open or slightly open, causing the leak. Additionally, there might be an air leak on the vacuum side of the tiny pipes, or the ends of the pipes may be worn out and not sealing properly. The common is located underneath the intake manifold, where a small tank and turbo controller are situated.