Sims 4 Error Code B31F: How to Fix It (November 2026)

Sims 4 error B31F shows up when loading a household or save, and often sends you back to the map. Like most Sims 4 load errors, it is usually caused by a broken or outdated mod or custom content (CC). This guide uses the standard EA troubleshooting steps.

What Does Sims 4 Error B31F Mean?

B31F is a load error. The game hit a problem while reading your save or the files in your Mods folder. It is not an official EA error code with a published meaning, so treat it like other Sims 4 load errors.

Quick Fix for Sims 4 Error B31F

1. Back up your Mods folder and saves.
2. Delete localthumbcache.package from Documents/Electronic Arts/The Sims 4.
3. Move the Mods folder to your desktop and test the game.
4. Repair the game in the EA app.

Common Causes

• Mods or CC not updated for the latest patch
• Corrupted cache files
• A damaged save file
• Damaged game files

How to Fix Sims 4 Error B31F Step by Step

1. Back up first

Copy your Mods and Saves folders somewhere safe.

2. Clear cache files

In Documents/Electronic Arts/The Sims 4, delete localthumbcache.package. It rebuilds itself.

3. Test without mods

Move the Mods folder out. If the error is gone, a mod is the cause.

4. Find the broken mod (50/50 method)

Put back half of your mods and test. Keep halving the group that causes the error until you find the file. Update or remove it.

5. Repair the game

EA app, The Sims 4, Manage, Repair.

6. Try an older save

If one save is damaged, load a previous save or backup.

Still Not Working?

Ask on the official EA Sims 4 forums (forums.ea.com) and include the error code and your mod list.

FAQ

Is B31F always caused by mods?

Usually, but a damaged save can also cause it.

Will clearing the cache delete my saves?

No. localthumbcache.package only stores thumbnails.

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