ThumbsUp

As I took the dog out in the quiet of the 4:30 morning, I walked past my parked GS. I heard a faint whirring sound coming from the rear of the car. I investigate and sure enough, there is an electric motor sound coming from the rear of the car, kind of like the sound of an electric fuel pump or a small vent fan. I went back onto the house, got my keys, and the car did accessory on, ignition on just fine, and it started OK this morning.

Any ideas?

bclexus

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.

ThumbsUp

Thanks, Sir!