Why is my 2014 dodge Ram 1500 key fob not working?

The main reason Your 2014 Ram 1500's key fob would fail to work is a dead battery; these don't typically last forever, and You'll often find that You need to replace every 2 to 3 years (sometimes sooner). Luckily, the replacement battery is common (CR2025) and can be found for a dollar or two. I'd recommend going with a reputable brand, since replacement key fobs are not cheap. Alternatively, You may have issues with a d***y or damaged key fob. This is a common problem if You find that Your battery is good, but the receiver isn't adequately picking up Your signal. If that's the case, try cleaning the key with an isopropyl alcohol solution, let dry, and see if Your luck improves.