Hey guys. After driving my car this morning, I heard a buzzing noise, apparently coming from under the hood, on the driver's side of the car. It stopped after a minute or so, and then happened again. I looked under the hood, and it appears to be coming from the pump in front of the battery (or in that area). I'm not sure if it was because of the cold weather, or something else. Does anyone know what this is, if it's normal, and if it's something I need to do anything about? Thanks in advance.