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Greetings, everyone.

My engine is producing a "Whooom" sound. I have recently replaced a pressure converter and breathing valve. Prior to that, I had the following codes: 27B900, 290900, and 244C00. All of these codes have been resolved and have not reappeared during both conventional and spirited driving.


It has about 90,000 miles, an increase from approximately 68,000 since I purchased it roughly 2.5 years ago. Oil and filter changes have been performed every 5,000 to 6,000 miles.

This sound appears significantly louder when chilly. Once heated, it operates with significantly less noise.

Initial Phase

There may be a minor boost leak; you would be aware if the turbo were malfunctioning. Do you possess an inspection camera to examine the area around the turbos?

No, my only option would be my phone, which would likely result in it falling into the engine compartment.

I would also note that there is a tiny hesitation during acceleration, however this occurs only when the engine is cold, to my knowledge.

Only £12 for a delivered camera; I recently purchased a new one a few weeks ago and did not anticipate much, but it is excellent.1080P HD 8MM 4.3-Inch Industrial Endoscope Camera Borescope Inspection Camera | eBay United Kingdom The code prompts me to consider vacuum lines and pressure converters, which are components of the turbo system. Please review this from a few weeks ago.

The pressure converter and breathing valve were changed last week, and no error codes or powertrain issues have reoccurred since then.