This is a common Honda problem and we have called the dealer to find out the problem and here is what they suggest. Disconnect the battery, then turn the key to the on position, then reconnect the battery. Then use the key fob and lock and then unlock the doors. This should make the horn stop beeping.
Please let us know if this works so it will help others.
Saturday, February 18th, 2017 AT 2:47 PM