I was hoping to avoid that because i know it will cost me a lot 

Perhaps it might be time to visit a MINI specialist with the appropriate diagnostic tools....

I saw these possible causes but i don't think most of it applies to me except for the timing component since i replaced the VVT Solenoids & teh cam shaft variables and checked my oil level "I'm using the correct oil" . I'm running out of ideas here and hoping someone can provide any guidance or someone who have seen this before

Here are some potential causes of the P2091, which I found online:

Worn timing belt or chain
Defective camshaft variable timing solenoid
Defective variable valve timing actuator
Engine oil level is too low
Blown fuse or fuse-able link (if applicable)
Misalignment of timing components
Corroded or damaged connector
Faulty or damaged wiring
Faulty ECU

Are you using 5w-30 engine oil?  Using the wrong viscosity oil can sometimes cause issues with the VANOS / VVT system since it uses oil pressure.

OK i replaced the second VVT Solenoid but the check engine light still on. Any idea folks??

I will try to replace the VVT Solenoid within a day or two & will post update

Here is another definition I found:

P2091 - VANOS exhaust side solenoid valve, control activation: Short circuit to positive

Another reason to try the back side VVT solenoid - can't guarantee this will fix the problem, but it is something I would try...

I know bud.. i just want to know what to do to fix it and get rid of this check engine light?

P2091 is "B" Camshaft Position Actuator Control Circuit High

no recent changes except changing the rear brakes so i don't know what's the issue. I don't want to spend the time on changing the second VVT in the back of the engine unless we know it will help. 
Any idea what P2091 means and what i can do to fix the issue?

If the front side VVT solenoid did not make a difference, try swapping it with the unit on the backside of the engine to see if the condition changes.

I presume this error showed up suddenly?  Any recent service done?

Hello folks;
I need help with my 2008 Mini Cooper R56 hatchback Base model. My check engine light came on with the following error code:
P2091 Camshaft Position Actuator Control Circuit High Bank C

I did change both Camshaft position sensors and i also changed the front VVT Solenoid (the one that easy to replace next to oil stick but the error light still on and i'm not sure what to do?
The car runs fine but i can hear the engine revving especially when going up or down hills and when idling i can tell the engine speed is going up and down.

What could it be? Do i need to change the second VVT Solenoid in the back of the engine? or do i have to go to a mechanic? 
Any help would be greatly appreciated folks.