The problem is probably your keyfob itself not the battery in it. I had the exact issue and I replaced the fob out of desperation due to the cost of having someone take the steering column apart. New fob = no more randomn horn activation. They seem to be good for a couple of years before the problem starts repeating itself.
Journey's Horn randomly honks
in Alarms, Keyless Entry, Key Fobs, Locks & Remote Start
Posted
The problem is probably your keyfob itself not the battery in it. I had the exact issue and I replaced the fob out of desperation due to the cost of having someone take the steering column apart. New fob = no more randomn horn activation. They seem to be good for a couple of years before the problem starts repeating itself.