Yesterday I happen to go in the garage, and heard a strange sound, sounded like a compressor motor by quieter, yet it could be clearly heard in the garage. Could not figure out where it came from, but almost 100% sure it came from the rear of the GS, below the vehicle, almost as of it was the fuel pump going crazy. The car had been parked for about 1-2 hrs at that point. It lasted about 40 secs or so and then it stopped. Any idea what that sound is and is that normal? Is there an evaporator motor or something in the tank?

 

was it like a hissing sound? because i heard the same thing when i exited my car the other night, but the car was still on. it was coming from the rear driver side and when i stooped down in front of the tire i am sure it was coming from under there somewhere. there's nothing wrong with the tire, i.e. losing air etc.

 

No, it was definitely a motor, and it didn't sound good either. pretty much the buzz of an air compressor, but not as loud.

 

I am having the exact same noise, from the exact same spot. Any help on this issue would be appreciated.

 

Ditto. I have the same noise also same spot. Sounds like a small compressor.

 

Prob the fuel system vapor recovery pump but I'd ask the dealership to confirm......

 

Hear also and agree with above.

 

How long is it supposed to run. I let mine run for over a half hour and didn't shut off til I turned on the ignition. I thought it was going to run down the battery.

 

Here is something on Page 8 from the Owner's Manual:

Noise from under vehicle after turning off the engine
Approximately five hours after the engine is turned off, you may hear sound coming
from under the vehicle for several minutes. This is the sound of a fuel evaporation
leakage check and, it does not indicate a malfunction.

 

Some of the verbiage in the owner's manual is so ambiguous. They must have used a poor translator to go from Japanese to English. So are they saying that this noise will come on for a few minutes after the car has been sitting turned off for 5 hours?