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Q: Electrical failure- the alarm goes off without reason on 2005 Volvo S40

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A few days ago, I came out of a mall and the flashers were going off. I unlocked the car, thought that I mistakenly hit the panic button and proceeded to start it. Then, the flashers started again. The horn started honking and the screen said "crash mode". After that, I turned it off and on again and it flipped from crash mode to "valet mode". Turned it off and on again and proceeded to try to drive home. About a mile in, it stopped on me, went to crash mode and I called triple a.

While parked outside my house, the alarm and flashers started going off again due to no apparent reason. I have since disconnected the battery.

Does anyone know what could be causing this?
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