The same thing just happened to me. I got in my car and started her up. This strange interior alarm went off at the same time my flashers started flashing in a high speed. I turned the car off and started it up again. This time the alarm was off but the flashers continued to blink fast. I hit the flasher button and it slowed down but continued to blink. What could this be? My Service Engine light also came on and stayed on.