Poor design if you ask me, since there is no way to stop the alarm while the vehicle is running. The fob has no effect on the alarm, or the car doors for that matter. Luckily the alarm will go off automatically after a couple of minutes. The solution to turning off the alarm is to turn off the car, then use the button on the FOB to turn it off.. According to numerous online forums and websites dedicated to the Honda Odyssey, many people experience issues with the factory security alarm going off at random times without provocation. Understandably, this could be annoying in the middle of the night or while you are at work. You can disable the alarm system by unplugging the hood latch.
If the alarm goes off and you DON'T have the key fob, put the key in the driver's door lock, and unlock the doors manually. This resets the alarm. Luckily I had a size 10 wrench in the car to take a battery terminal off to silence the alarm, while I searched the internet for an answer.. The most straightforward way to turn off a Honda Odyssey alarm is by using the key or remote: 1. Unlock the Vehicle: Insert the key into the driver's side door lock and turn it to unlock the vehicle. 2. Check for Open Doors or Trunk: Ensure that all doors and the trunk are securely closed. 3.