Technical Help Needed Please

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Technical Help Needed Please

Had a look today, and the intercooler hose was off, I put it on again, when I switch the engine on, just the yellow triangle warning light comes on for about 20 seconds then goes off, then the engine light come on yet again. When the yellow triangle warning light is on you can hear like a fan sound and when the triangle light goes off the fan sound goes off too. Has anyone got any ideas where I go from here. My code reader just say fault with turbo boost control sensor fault which I can delete and fixed the hole in the hose.
 
Can anyone tell me how to check to see if the wastegate is working properly. I im able to push it down about 1 to 2 cms till it hits a stopper, When I im pushing it down I can hear something like a sucking sound or something like that but when I put my finger over the tiny steel pipe that comes off the wastegate I can't feel anything. Can anyone help me please.
 
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