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alfredcrystal6

DS5 Turbo Lag Whistle

Hey, my 2016 Citroen DS5, gasoline engine, is acting up. Check engine light's on, power's down, and response is laggy. Plus, there's this whistling/hissing noise when I accelerate. Already checked for obvious leaks, any ideas?

4 comment(s)

hansblade1

Sounds familiar. Had a similar issue with my old Volvo V70, although the engine was diesel. The symptoms seem related to the turbo system. Could be a boost leak, or perhaps a faulty boost pressure sensor. Have you checked for codes?

alfredcrystal6 (Author)

Codes? I haven't hooked it up to a reader yet. I'm guessing the whistling is probably pressure escaping somewhere, but could it really be the sensor?

hansblade1

That whistle is concerning, definitely points to a leak. But a faulty sensor can cause all sorts of weirdness with boost control. Honestly, with those symptoms on a Citroen DS5, I'd take it to a workshop to avoid further complications. Better safe than sorry with these turbo systems.

alfredcrystal6 (Author)

Cheers, I appreciate the advice. It was the electrical bypass valve, like you said probably something with the boost control. Cost me 250€ to replace. Runs like new now.

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