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Originally Posted by AndDown
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thanks! I read some similar articles but none of the mentioned reasons seem to be the case for me. 1) fob was not anywhere near the car when the alarm went off 2) the battery should be good for a 2018 car plus the alarm was loud for about 8 hours before the battery drained 3) I looked but did not find any dirty hood latch sensor
I suspect that the in-car motion detector went wrong somehow. Now I turn it off every time after I park the car. The problem seems gone. Will stop doing that after a while only when the car is around me and see if the problem comes back.