Faults on my A4 2.T FSi

I have these fault codes on my 2.0T FSi A4.

Anyone offer any advice..

Address 01: Engine Labels: 06F-907-115-AXX.lbl
Part No SW: 8E0 910 115 J HW: 8E0 907 115 C
Component: 2.0l R4/4V TFSI 0080
Revision: --H02--- Serial number:
Coding: 010C0003190F0120
Shop #: WSC 00411 210 91522
VCID: 285BA785E281
2 Faults Found:
008583 - Bank 1; System too Lean at Idle
P2187 - 004 - No Signal/Communication - MIL ON
Freeze Frame:
Fault Status: 11100100
Fault Priority: 0
Fault Frequency: 1
Mileage: 184798 km
Time Indication: 0
Freeze Frame:
RPM: 781 /min
Load: 20.8 %
Speed: 5.0 km/h
Temperature: 90.0°C
Temperature: 21.0°C
Absolute Pres.: 990.0 mbar
Voltage: 14.224 V
001287 - Idle Control System RPM: Higher than Expected.
P0507 - 001 - Upper Limit Exceeded - Intermittent
Freeze Frame:
Fault Status: 00100001
Fault Priority: 0
Fault Frequency: 1
Mileage: 184843 km
Time Indication: 0
Freeze Frame:
RPM: 880 /min
Load: 14.5 %
Speed: 0.0 km/h
Temperature: 95.0°C
Temperature: 34.0°C
Absolute Pres.: 990.0 mbar
Voltage: 13.843 V
Readiness: 0000 0000

Well last night i popped the bonnet while it was running, and it sounded like an old kettle with a whistle. Now really confused..
Crankcase Breather Valve?
Or
breather hoses?

I am going to check all the breather hoses, to make sure they are not split – but how can i check crankcase breather valve?

Found my answer, If the breather valve is faulty, full engine vacuum is typically found when removing the oil cap at idle.

So the best things to check either of these faults is to check for split / damaged hoses and to test breather remove oil cap?

Well I went out at dinner and started it up, and i can not remove the oil cap when running or just after turning her off. but the hissing is still really bad.