Why is my 2015 honda civic keyless entry not working?

A dead key fob battery is the most common cause of a 2015 Honda Civic keyless entry no longer working. To access the battery, You'll have to open the fob. Typically, You have to use a coin or a small screwdriver to pry the battery cover open. The battery will look like a silver button. Look for the numbers on the battery and match those to a replacement battery. If a new battery does not fix it the old key fob might be broken. On the other side of the key fob's thin external plastic shell is a sensitive interior circuit board, which could become damaged when pressed under the weight of a heavy object like a book. Water damage could also cause the circuit board to stop transmitting a signal.