BMW E60 no power, stalling when braking

[Jarzembek]

Hello, i have problems with BMW E60 with Engine N52B30 from 2007.08.

I have less of power engine (80% of normal power i think). Engine sometimes RPM is Crazy from 500 RPM to 860 RPM. And when i braking, engine sometimes is stalling. Ind DME i have always three errors. 002e81 from water pump and 0029F4, 0029f5 from catalytic converter but....few months ago they are clogged and my client cut them out so that why i have those codes. And that's all. Have any idea? How to check Vanos and Valvetronic? There is no error codes but maby..... Sorry for my Englisch

[CPC]

Hi could be a million & one issues. But start with the simplest of things (vacuum leak, electrical/alternator/etc) working your way towards the more complex ones (i.e. VANOS). No codes registering is odd. Misfiring, electrical or faulty ignition items would pull up codes.
Questions:
- Did it start all of a sudden?
- Is it independent of outside temperature or engine temperature?
- Is the car manual or automatic?
Hmmm...

[Jarzembek]

Thank's .Today i didnt erase errors and take the car for longer drive ( about 30miles ). And when i come back and check errors i found the one. 2A82. Tomorrow i will take selenoind from intake and change with another selenoid. Probally problem is with VANOS.