I have had this issue on both my 2014 Fsport GS and my 2013 Luxury GS. I go out to my garage hours after I parked the cars and the fuel pumps would be running. Anyone else have this issue?

 

https://www.clublexus.com/forums/gs-...is-normal.html

 

Normal, as stated above

 

Heard this noise last week as well, perfectly normal.

 

The humming noise you hear coming from under the vehicle hours after turning Off the engine is the fuel evaporation leak check. Any time up to approximately 5 hours after the engine is turned Off, you may hear a humming sound coming from under the vehicle that could last up to several minutes. This is the sound of a fuel evaporation leakage check and, it does not indicate a malfunction.

 

Thank you all for the replies. It sure sounds like the fuel pump was running.