Last week my Karma started to occasionally make a strange buzzing noise when moving more than about 5-10mph. Inside the car it sounds like being inside a propeller driven airplane - same kind of muffled buzzing sound.
The frequency of the buzzing sounds constant, but the volume seems to have 3 different modes which are totally unrelated to speed. Sometimes the buzzing will be very quiet, and sometimes it gets so loud that it makes the car vibrate quite noticeably, and that's when I get concerned that it's about to explode or something. Most of the time when it's doing this the buzzing is mild, but when it goes into loud mode it typically only lasts a few seconds before going back to mild.
It had been doing this only intermittently since it started last week, but yesterday it started after about 15 miles of driving, and then pretty much continued for the rest of the day. Hard to tell where it's coming from because it doesn't make the sound when the car isn't moving, but it sounds like it's coming from under the hood - the gas engine is not on.
At first I thought maybe it was from the A/C, but if I turn that off it doesn't make any difference. Maybe it's from some part of the battery cooling system? Dunno, but I'm scared. The car has never made this noise before, but it's one of those noises that sounds expensive.
Anyone else had this happen before?
The frequency of the buzzing sounds constant, but the volume seems to have 3 different modes which are totally unrelated to speed. Sometimes the buzzing will be very quiet, and sometimes it gets so loud that it makes the car vibrate quite noticeably, and that's when I get concerned that it's about to explode or something. Most of the time when it's doing this the buzzing is mild, but when it goes into loud mode it typically only lasts a few seconds before going back to mild.
It had been doing this only intermittently since it started last week, but yesterday it started after about 15 miles of driving, and then pretty much continued for the rest of the day. Hard to tell where it's coming from because it doesn't make the sound when the car isn't moving, but it sounds like it's coming from under the hood - the gas engine is not on.
At first I thought maybe it was from the A/C, but if I turn that off it doesn't make any difference. Maybe it's from some part of the battery cooling system? Dunno, but I'm scared. The car has never made this noise before, but it's one of those noises that sounds expensive.
Anyone else had this happen before?