I have the same problem. I called a mitsu dealer service dept and they told me to turn the key to the right 2 times to turn off the alarm. Of course, i failed to asked if i turn it back to the left to lock the car, will it turn it back on. But i did try it, and my alarm hasn't gone off yet again today. Hopefully this helps. Good luck ! Cheers :)
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car alarm goes off for no reason on my yukon xl 2008
My 2000 Mitsubishi Diamante car alarm was randomly going off many many times about 1 month ago, but now it doesn't go off as much anymore. I started having this car alarm problem about 3 months ago and it got so bad that my fiance had to disconnect the car battery cables one night.
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