Needless to say, if you have encountered the CE-34878-0 when trying to play Horizon Zero Dawn you are on PS4. The error code is specific to the console and can occur with any game. It has nothing to do with the game, but with your console configuration. The error indicates that the game has crashed, but nothing to worry about you can start it again. Under most circumstances, you can play the game again by a simple restart of your PS4. However, if the error code is persistent, we have a number of fix that you can try.
The first thing you must do is restart the console. Simply turn it off, let it rest for a while and restart it back again. If the error continues, you should ensure that the latest patch of Horizon Zero Dawn is installed. You must also ensure that the PS4 is updated.
If the problem still occurs, the cache of the game might be corrupted, which is causing the game to crash. You should delete the cache so the PS4 can download the game files again. Once you have done the above, try launching the game and check if the Horizon Zero Dawn Error Code CE-34878-0 on PS4 still occurs. If the error still persists, you would want to reinstall the entire game to fix the problem.
Have you made a change of hard drive recently? If yes, then reinstall the original hard drive that came with the console to fix the issue.
We hope these fixes have resolved the Error Code CE-34878-0. Here is a snapshot of all the fixes you can try.
Restart the console
To restart the PS4, press the power button and allow it to power down. Remove the power cords and hold the power button again for 10 seconds. Allow the PS4 to rest for a while and connect the power cords. Fire it up and launch the game. Most people will eliminate the error simply by this step.
Update Horizon Zero Dawn to Latest Patch
If you have encounter the error at the time of writing this post, it’s unlikely that a new patch will be available. However, there is not harm in checking. From the game library, hover over Horizon Zero Dawn and press the Options button on the controller. In the menu, click on Check for update. If there is an update for the game, download it.
Update the PS4
Error code CE-34878-0 also occurs when the PS4 is outdated, so ensure that you have the latest software for the device. Press and hold the power button, release when you hear the second beep. This will start the PS4 in Safe Mode. Select Update System Software and select the storage device. You can refer this page to update PS4 software.
Clear Cache on PS4
Cache are temporary files on the PS4 that enhance the performance of games. These files can sometimes be corrupted and lead to errors. You need to clear cache, but there is no way to do it on the PS4. Instead, you have to hard reset the PS4 to clear cache. Turn off the PS4 completely and disconnect the power cords. Let the PS4 rest for 30 seconds. Now, connect the power cord and restart the PS4. Your cache is cleared and the Horizon Zero Dawn Error Code CE-34878-0 should not appear.
Reinstall the Game
Finally, if nothing has worked, you need to reinstall the game itself. Corrupt or missing game files can lead to the error. So, reinstall the game to fix the error.
Install the Original Hard Drive
If you have upgraded the hard drive or removed the original that came with the PS4 for some reasons, you need to reinstall it to fic the error.
Hope the above steps have resolved your error.