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Honda Odyssey alarm goes off by itself?

Updated: 10/22/2022
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14y ago

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My wife had this problem with her '06 Odyssey. The car thinks it is being stolen, so the alarm goes off when the car is started, and the alarm gets louder when she drives.

The alarm eventually times out and turns off if she turns the ignition off and waits.

I called two dealer service departments- one claimed he had never heard of the problem (!) but suggested it was caused by locking the car with the remote, then manually unlocking it (this is what my wife did).

Another dealer (and also an auto alarm expert on the web) gave the solution: put the key in the driver's door, then lock (turn left) and unlock (turn right) the door.

My wife tried it, and it stopped the honking!

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Q: Honda Odyssey alarm goes off by itself?
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