How To Fix CE-34878-0 Error - Battlefield 4 Sony PS4 error Sony PS4 users have been reporting issues with CE-34878-0 Error when playing Battlefield 4, and we are going to show you how to fix it! How To Fix CE-34878-0 : Go to your Settings and sign out of PSN. Start Battlefield 4 when you reach the main menu hit the PlayStation button to log into PSN. Once you’re online, start multiplayer and get in a few rounds until the error pops up. Repeat this process every time you get the error . Alternatively you can spam the ( X ) button in a bid to beat the error. Hopefully Dice will come up with a patch for this sooner rather than later!