If you find that your PS4 controller is not connecting to your PS4, you might be dealing with a firmware issue, interference, a bad battery, or a number of other problems. To help you troubleshoot this issue, we’ll start with the simplest solution and go from there.
My PS4 controller won't connect, no PS4 controller detected
Syncing issues are the most common reason for PS4 controllers not connecting. The controller could have desynced on its own, or someone could have synced it to another console or device. In some cases, a firmware issue with the controller could even prevent it from syncing properly.
In addition to syncing issues, you could also have a USB cable or battery problem. You’ll need a USB cable that can transfer both data and power to perform the syncing process, and issues with frayed cables and damaged USB ports can also prevent your controller from connecting.
Since PS4 controllers use Bluetooth to connect wirelessly, signal interference is also an issue you may encounter. If there are a lot of wireless devices near your PS4, it could prevent your controller from connecting.