When you’re playing a game on your PlayStation 4, the controller will often turn red. This is because it’s telling you that it can’t find the game’s main menu. There are a few things you can do in order to fix this issue. The first is to try and change the language of the game. If that doesn’t work, then you can try and reset your PlayStation 4. If all of these measures don’t work, then you may need to get a new PlayStation 4 controller.