2006 cayenne S
126k miles
please help me identify the sound its making upon shut off. (Please see video)
note: its been giving me a p2189 running lean on idle; bank 2.
Noise is coming from somewhere front left. Drivers side for sure and toward the front.
any help will be appreciated.

 

Sounds like an air or vaccum leak, to me it sounds like trumpet. I would guess some valve/solenoid that's on one of the lines that may be failing. Looking on the 'net other owners reported similar noises with their cars for all sorts of reasons. Should be able to pin-point the noise if you get close enough, perhaps use some smoke to help you find it easier..

Is it equipped with the air-suspension?

 

no air suspension, steel springs. Im still hunting that sound, its litetally only as the engine shuts down, its like air being released or a noisy fan shutting off but im leaning more toward a a vaccum leak, im about to smoke test and see if i can finally find where the damn leak / sound is coming from. The sound and the initial smokr test seem to be coming from behind the left side air filter box and also some smoke coming from under the hood latch somewhere in front of radiator.. i still have to pinpoint its source....