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MK5 Golf GTI Hissing noise on idle

vagboi

New member
Location
United Kingdom
Car(s)
Mk6 Golf
Hey everyone!

Recently bought a MK5 GTI engine code BWA with 120k on the clock. Noticed a hissing sound like theres a vaccum leak somewhere. It occurs at regular intervals every few seconds. I can't see anything but was wondering what you guys thought, you do have to listen closely to hear it. I've attached the youtube link of the video I recorded.
Hissing sound video

I did a scan with Carista obd device and there were some error codes that popped up that could be related:
P0441 - Evaporative (EVAP) Emission Control System, Incorrect Flow
P0234 - Boost Pressure Regulation, Limit Exceeded (Overboost Condition)
P0444 - Evaporative (EVAP) Emission Control System Purge Control Valve, Circuit
P0033 - Turbo Charger Bypass Valve (N249), Control Circuit
P0243 - Solenoid Valve (A) for Boost Pressure Control (N75), Open / Short Circuit to Ground

Would appreciate any help!
 
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