Poppy Playtime Ch5
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Engineering Workshop Locker Code

Opens the Engineering Workshop locker containing critical documents and the Magnetic Hand ability. The code is randomized for most players — follow the UV clue trail to find yours.

Unofficial fan guidePatch baseline: Patch 5Platform: PC (Steam)Evidence: Cited sourcesLast updated: 2026-08-31

TL;DR

Unique to your save

RandomizedEngineering WorkshopRequired Hand: Pressure Hand

Reward: 7 lore documents (Bigger Bodies Initiative notes) + Magnetic Hand ability unlock

This randomized code introduces a multi-step clue chain. Unlike the Pressure Hand code, the UV markings point you through a whiteboard clue, a shelf reference, and a matching container. The answer belongs to your playthrough, so a number copied from another guide may not work. The locker rewards you with lore notes and the Magnetic Hand ability.

How to Find

  1. 1Enter the Engineering Workshop area
  2. 2Shine UV Blacklight on the whiteboard to reveal a partial reference clue (e.g. '67 JL')
  3. 3Look through the nearby window at the shelving unit marked 'SP'
  4. 4Use Blacklight to find the container stamped with the clue number from the whiteboard
  5. 5Walk out to the metal walkway to read the final digit off the matching container
  6. 6Enter the 3-digit code into the Engineering locker keypad
  7. 7Use the three digits revealed by your own UV clue trail

Troubleshooting

This code is randomized, so always follow the UV clue trail in your save

If a number from another guide does not work, retrace the clue chain from the whiteboard

Check the whiteboard first — it gives you the reference number for the correct shelf

Match the reference to the correct rack/container using UV light on the 'SP' shelving

The final digit is on the container itself, visible from the metal walkway — not inside the container

Make sure you're reading UV markings correctly — some are very faint and require close proximity

The locker requires the Pressure Hand to be equipped when approaching — switch hands if needed

If you die and reload, the code stays the same for your save file

FAQ

Is the Engineering Workshop code the same in every playthrough?
No. Follow the UV Blacklight clue trail to find the three-digit code generated for your save.
How do I find my randomized Engineering Workshop code?
Use UV Blacklight on the whiteboard to reveal a reference clue. Match it to the shelving unit marked 'SP'. Find the container with the matching clue number and read the final digit from the metal walkway.
What do I get from the Engineering Workshop locker?
Seven lore documents about the Bigger Bodies Initiative and the Magnetic Hand ability, which lets you traverse magnetic panels on walls and ceilings.
Does the Engineering code change if I die and reload?
No. The code is generated once per save file and stays the same when you reload. You only get a new code if you start a completely new playthrough.
References & Sources

Related Pages

All Codes

Complete code list

All Puzzles

Puzzle solutions

Collectibles

VHS, plushes, notes

Official Chapter 5 scene references

Official Steam media — visual context, not solution proof. Codes and puzzle steps are verified from the cited guide sources, not inferred from these promotional images.

Blue and red GrabPack hands illuminating a painted floor symbol
The GrabPack frames a fluorescent symbol revealed on a dark factory floor.
Huggy Wuggy approaching the player inside a damaged corridor
Huggy Wuggy closes in while the player raises both GrabPack hands in a corridor.

Source: Poppy Playtime — Chapter 5 on Steam. Images © Mob Entertainment. This independent fan guide is not affiliated with or endorsed by Mob Entertainment.