I have a 1998 Volvo S70.
The question here sort of describes my problem, but I will be more specific. At (apparently) random intervals, I will hear a short (half a second) beep coming from somewhere on the passenger side of the car. Sometimes they are consecutive- I have heard probably six or eight in a row- and sometime there is just a single beep. It is high-pitched, maybe around a G.
I asked my mechanic about it, and he suggested maybe there was a toy or something in the car. I have thoroughly cleaned the car, and found nothing. Beyond that, he had never heard of anything like what I described.
Like I stated, these beeps have no discernible pattern. At first I thought they occurred when I went over a bump, but then they happened when I was just driving, and even when I was waiting at a stop light. I have not heard them while I am in park.
They have been occurring with more and more frequency. In my twenty-five minute drive to work, my car beeps several hundred times. Apparently nothing is wrong with my car or my computer system, I keep it checked and in good condition.
Has anyone else experienced this? Does anyone know what causes it?