[2014CR2MSM]

Does this Accord have a beeper or does it actually honk the regular horn when you lock the car?

If it has a separate beeper (youtube), it's located under the left rear of the bumper so if none of the other suggestions help, have a look under there.That beeper can get crusted over with snow/ice, road crud, or insects made themselves a nice home in there.

Also open and re-close the hood and trunk. If either of those aren't closed fully/correctly, the system won't give you the answer-back beep/honk because it's detecting that something is still (partially) open.

Yep had this happen to me twice. I was working on my car and just let the hood down but not fully close. Walked away to grab something and it wouldnt beep when i pressed lock on my remote. Walked back and pushed the hood all the way down and voila, beeps again when i press the lock button on my remote.