As the title of this thread says, the vacuum pump on my beloved MY11 S60 2.0T is making noise the whole time, even in Position 2 (engine off) and is being loud enough that one can hear it even when engine is working.
The sound is very very similar to this one:
The pump does not work when the key is in Position 1 (not sure if this info matters, but just throwing it out there), but my mechanic is sure that the pump shouldn't even work in Position 2, let alone the whole time while the key is in Position 2.
I replaced the old pump which also made such noises with brand new one (bought it in dealership and had it calibrated there) not so long ago, as there were indications that the old one was shot, and next up is the switch with hoses.
Before I pull the trigger again, my questions regarding this issue are:
- is it normal that this (particular) pump makes such noises?
- is it normal that it constantly works (or at all!) in Pos2, and if case it's not, what could be the reasons? (Switch, brake booster, some sensor...something else?)