Okay, here's the situation. I go in my car, turn it on and let the engine warm up. Then I go to lock my door from the inside and it produces this buzzing now. Now if I lock the door before the car is on it won't happen but if I unlock it when the car is then on, the noise reappears. I think it has something to do with the security or sensor. But the door sensor light isn't lit up. And I believe it's only the driver side door, I don't recall hearing it from the passanger door. Does anyone know what the cause is?

uHHH... are you sure it's not your antenna???

I had a buzz when my interior light when off. It was just a bad bulb that worked but it buzzed when it went off. It might be your door light or the interior headlight like I had. Or your antenna. Where on the car is it comming from and how loud is it?

I doubt it's my antenna. I think it might be the bulb though. All my dome lights aren't working. None of them turn on. And the noise is coming from the sean of the door by the chair. It's not that loud but it is noticable.