daryll40

My 2009 LS460 AWD with air suspension now, at 56,000 miles, has this noise frequently during driving and sometimes at idle. Like an air compressor for a few seconds. It's not loud, but you definitely hear the whine/air type noise. It's almost not even bothersome for me as I've gotten used to it. But when my wife or others are in the car they always ask "what is that"? Any ideas?

jgbackes

iTrader: (2)

That sure sounds like the air compressor. The Cadillac I used to have was very noticeable, but I have NEVER heard the one in my LS kick in.

It looks to me, based on the info at www.alldata.com, that it's a pretty major pain in the tuckus to get to. My guess would be that an isolation bushing has failed and the pump is coming in contact with the bracket. Also the pump itself could be going bad. Also if you have a leak in any of the lines or "shocks" it will cycle much more than it normally would to attempt to keep everything level.


jeff

CJITTY

I have always slightly heard mine but I have to be outside the car and it's not very loud at all but you can hear it. .I mainly notice it after I raise my car from lower levels with my data controller

daryll40

I am the OP. If it's any help, I even hear the noise for about 5 seconds about 30 seconds after shutting down the engine.

RR601

I hear a noise for a few seconds on mine when just parked in the garage.
I just assumed it was the fuel pump but you have me thinking about that

SBlexus

I think what you're hearing is the headlights.

RR601

Don't think so. I may not have been very clear. This is even if the car has been sitting for an hour. If I just happen to be in the garage at the time doing something else.

CJITTY

These cars are actually metal mammals and snore and fart in slumber like we do

SBlexus

I knew it was something like that!!!!!

daryll40

I doubt it's the headlights, but if I shut off the whatever-that-button-is, won't the noise go away if that's it?

daryll40

Well, maybe it IS the headlights! I turned off the AFS switch and the noise SEEMS to be gone (although I did hear it once, I think). So if it's that, what is the repair?

amaya3898

Is he noise you hearing like a sqeak noise

amaya3898

Sound almost like a rusty pulley of some sort

amaya3898

Is the noise like a squeak noise or sounds like a rusty pulley

daryll40

Neither. It sounds like an air compressor. And I have now concluded that it is NOT the headlights.