BMW e61 2.0d n47 Power Loss and Check Engine Light: Turbine Controller Issue

Hello, I have a problem with my toy car. The above-mentioned check engine lights up and the car loses its power. will pass a few kilometers so okay 10 and the error disappears as soon as the car has disappeared, the power will go off the leg from the gas, i.e. when I reach the intersection, it turns back on and the car has no power. on the main screen displays reduced power as this error will repeat from 3 times it lights up on the clocks checka icon. I gave the car to the mechanic and found that the turbine controller sits or turbine geometry. So he sent the turbine along with the regeneration controller. after installing the regenerated turbine, "making geometry and supposedly a turbine controller", the car regained its lifespan, after less than 3 times the problem returned to the mechanic and he was something else because the one who regenerates the turbines said that it does not fall in these models and drivers.
So, did anyone have such a problem and how he solved it, or maybe someone knows how to take it without incurring unnecessary costs?
please help me the cool car and I would not want to sell it for probably such a trivial reason.
Thanks in advance for inf info about my problem. greetings

codes are:
- 497D
- 4933
only those 2 codes are visible

Thank you for the hint I will check this opportunity and I hope it will be.

Did someone explain something on your topic? I have the same as you.

prosty_01 wrote:

That is the car equipped with dpf.
You have what to check the values of sensors that the driver sees ??? For example, inpa or something that has insight into system parameters while the engine is running.
The first error concerns the credibility of the back pressure sensor, i.e. the one attached to the right side of the exhaust system with one hose.
The second error concerns EGR exhaust gas flow. Probably the DPF has been overcome by problems with the exhaust gas pressure sensor (with incorrect readings, the controller may not start regeneration) and too much exhaust gas flows through the EGR and the mass air flowmeter detects this abnormality.
I had a similar case in e91 with the same engine. Problems with dpf generated other errors, including EGR. Cleaning the filter and replacing the exhaust pressure sensor and car hula so far.
For this mechanic I would not drive in your place anymore.

Hello ,

I had a moment of time and checked the parameters you wrote about:

Return pressure exhalation:

On the switched off engine, 9.98 varies to 11.99 mbar

The idle speed of 16.98 varies up to 19 mbar mbar

2500 rpm 35.98 mbar

Temperature before the particulate filter:

A strange value appears - 40.05 * c

The temperature before the catalyst 160 * c

The above parameters were tested in ISTA

In Inpa, by contrast:

The boost pressure is exceeded the scale and the exclamation mark and the mass of air from the flow are also exceeded the scale and the exclamation point, checked at low revolutions after adding the gas the same.

After the replacement of EGR, 4933 is not coming back, so unfortunately, 497D is back. Before the exchange there were both.

Hello, I have replaced the exhaust back pressure sensor and it turned out that the filter was not very clogged.
Pressure feedback at idle speed The new sensor showed around 7 mbar.
I've been around for a month and it's ok