DS4 Turbo Hissing and Jerking

Hey, I had something similar happen in my DS4, though it was a while back. Those symptoms sound familiar, especially the jerking and the hissing. Have you checked the air intake system for any leaks or blockages? That might be worth a look before diving into the boost pressure sensor itself. It could also be related to the intake manifold. The engine light coming on is never a good sign, though.

Thanks for the tip! I'll take a look at the air intake. Where exactly should I be looking for leaks or blockages? And how would I identify a problem with the intake manifold? Is there anything specific I should be checking for?

Well, on my DS4, the hissing was definitely related to the turbo and I eventually had to get it looked at. It could be a faulty sensor. Given all the symptoms you're describing, I'd honestly recommend taking it to a workshop. They'll be able to properly diagnose the issue and save you a lot of time and hassle. You could try cleaning the sensor yourself but be very careful with it. I would recommend to get it checked.

Thanks for the advice! I took it to a workshop, and you were right – it was the boost pressure sensor. Turns out the cable connection was defective. Cost me 95€ to get it sorted. Appreciate the help!