Had the same issue one time while driving down the highway. Alarm went off 3-4 times. It finally quit after resetting it each time.
Took into dealer to have checked. They said the same thing - they couldn't find anything wrong.
They did mention, however, that aerosol cans such as deoderant, air freshener, Pam, etc. would set the alarm off if injested into the sensor. I guess the air circulation could pull the aerosol spray down to the sensor. Go Figure?
Pete and Patty
2010 Georgetown 378TS; 2012 4dr Jeep Rubicon
1 Yellow Lab (hers);1 Little Bitty dog (mine)