My 2008 S60 D5 Acted weirdly a few weeks back, lost power under heavy load on a hill, engine off and back on all fine, then the other day made a loud noise and lost all power. Tickover is ok, and if i floor it 2500 rpm and above its fine but in between that it hunts up and down all over with zero power, can move it maybe 5 mph. Im getting the errors
Boost pressure sensor - signal too high
Turbo control pressure too high
Ive replaced the boost pressure sensor but the error didnt go. when i clear all errors its ok for the first 10 seconds then back to this.
I thought turbo actuator but it can send the revs from 1000 up to 2000 with no change in the throttle
https://www.youtube.com/watch?v=u0u44CqNLkU