Perception Bug Fix

⭐ ⭐⭐ (1,597 endorsements) 📥 169,446 downloads 📌 v2.0 📅 10/16/2018
🟡 Updated this year

By dphile · Bug Fixes

⬇ Download Mod Source: Nexus Mods ↗ 📅 Updated: 3/26/2026 📅 Created: 10/16/2018
⚠️ Install Order · 2 steps
1🛠️ F4SE — Fallout 4 Script Extender Download ↗
2🔧 UFO4P — Unofficial Fallout 4 Patch Download ↗

Install in this order, then this mod last — most mods fail to load without their framework and dependencies in place.

🔍 Analysis

  • 👍 0.9% endorsement rate
  • 🏆 #97 of 103 Bug Fixes mods in this game by downloads

📋 About This Mod

#NEW UPDATE

This should be the final version of this mod, which is why I incremented the version to 2. The mod will make med-x not give you its poison resistance in the game if you are under the conditions for the perception bug to happen. The mod is also published on bethesda creations.

Bethesda Creations Link

The mod now checks if you are under the effect of the specific Stingwing or Radscorpion poison effects and withholds poison resistance if you are. This should fix people's problems with having perception buffs and debuffs that circumvent the old mod's action.

If anyone encounters an enemy with Perception damage effects that trigger this bug, let me know in the Bugs section, and I will look into it.

Thank you all so much for downloading this file. I've never felt more proud of myself or even proud in general. Thank you again.

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Have you had enough with the Perception Bug? Did you recently notice your perception is lower than it should be, only to find out the only way to fix it is to revert to an old save? Well, I will soon have a video on how to correct your bad perception value, and in the interim this mod will prevent the bug from occurring.

The Perception bug occurs when you use Med-X, which has the "FortifyPoisonRsist" MGEF, while currently poisoned by any variant of Stingwing or Radscorpion. The Stingwing and Radscorpion poison has a perception -5 for 4 seconds, and if you take Med-X while poisoned, your character will have -4. 4 Perception permanently. This mod runs a condition check on Med-X's "FortifyPoisonResist" to only apply poison resistance to you if your perception is at full value, keeping the bug from ruining your character's perception.

This mod is a preventative measure for the Perception Bug and cannot "fix" the bug if it has applied to your character, however, I have included a video on how to fix a broken character in the videos section.

🤖 AI-enhanced — based on mod data

Perception Bug Fix is a small utility mod that prevents the Perception Bug from affecting the player. With 1,597 endorsements and 169,446 downloads, it's a popular fix for a specific issue. Last updated in March 2026, it's actively maintained.

✨ Key Features

Prevents the Perception Bug from affecting the player.
Actively maintained (last updated March 2026).

📊 Pros & Cons

✅ Pros

  • Community-approved fix with 1,597 endorsements.
  • Huge download count (169,446) shows it's widely used.
  • Simple, focused purpose—does one thing and does it well.

⚠️ Cons

  • Description is minimal—no details on what the bug actually is or how the fix works.
  • May require manual installation; no mod manager support mentioned.
🎯 Is This For You?
For players who have encountered the Perception Bug and want a straightforward fix. Skip if you haven't experienced the bug or want a mod with more features.
📦 Install:Easy· Under 1 minute

💡 Beginner Tips

  • If you're using a mod manager, try installing manually by dropping the files into your game's Data folder.
  • Check the mod's comments section for any reported issues or additional setup steps.
  • Make sure your game is updated to the latest version to ensure compatibility.

📊 Mod Details

Game
Fallout 4 Mods
Author
dphile
Version
2.0
Downloads
169,446
Endorsements
1,597
Category
Bug Fixes
Created
10/16/2018
Updated
3/26/2026

🧩 Commonly Used Together

Users add these mods to the same collections — a real compatibility signal, not an AI guess.

🔧 How to Install Fallout 4 Mods

Download from Nexus.

📖 Full step-by-step install guide for Fallout 4 →

Visit the official mod page for specific installation instructions for this mod.

🎮 Need cheat codes or console commands? Check ur gaming wiki for Fallout 4 commands, item IDs, and more.

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