Boost pressure too high
 

Switched car to vida. It showed error-boost presure too high. When driving, around 3k revs it shows engine needs service. Where to find solution?

Sounds like sticky vanes in the turbo. Needs a good clean, not a can of crap in fuel or intake, an actual clean, Mr Muscle foaming oven cleaner dissolves the carbony crud.

Could someone explain which one is solenoid and which one is actuator?

Re the picture, both are identical components but no 1 is referred to as the Turbo Control Valve (TCV) and no2 is the 'Anti Stutter Valve. Both are solenoids.

I had similar issues to yours (variety of codes - P2263, P0234, P2035) but replacing the TCV (£40) made no difference. I'd start by checking all vacuum lines for leaks. Apart from the TCV, I replaced the MAP sensor - whose full title is MAP and Boost sensor (£9). The throttle body was coated in oil/crud so cleaned that and the Temperature sensor too. Car ran better but still jerking / limp mode. Gave up trying to reach the Anti Stutter Valve!

In desperation, took it to an indy Volvo garage. VIDA checks showed not fuel or turbo issues (relief) so they used a smoke generator to check the vacuum hoses and found a small leak where the intercooler pipe joins the throttle body. Car now ok. Garage bill £125 but they not only worked on it for longer than they billed me, they also did a full road test including live data check.

In that picture, 1 is a solenoid and 2 looks like one also.
Solenoid is a general term for a part which uses electromagnetism so for example, a starter motor solenoid uses electromagnetism to move a steel cylinder to bridge the high current contacts to the main starter motor. Relays can be solenoids too.

In the case of a boost solenoid, electromagnetism is used to control an internal rod in order to regulate air/vacuum flow to another component.
A boost solenoid will then be connected to an actuator which in turn moves to control boost levels.
"Boost" solenoids are also used on some cars to control non boost related actuators like an EGR actuator for example.