- Gaming and consoles
- PlayStation 4
SU-42118-6
PlayStation SU-42118-6 on PS4: system software update issue
Risk level
Medium
Proceed carefully and stop if the check is unclear.
Urgency
Medium
Quick answer
The PS4 could not finish its system software update. Turn off and unplug the console, switch the router or modem off for at least 5 minutes, delete the update file from Notifications and start the update again.
Safety first
Stop and check this first
- Do not turn off the PS4 or remove the USB drive while the update installs. Use only Sony's official update file.
Safe checks you can perform
- Power off the console and router with cables out
- Delete the update file from Notifications
- Update from a USB drive in Safe Mode
Leave these tasks to a qualified professional
- Do not attempt this professional task: PlayStation Repairs diagnostic tool
- Do not attempt this professional task: Repair through PlayStation Repairs
What a technician must be able to justify
Technician visit
These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.
These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.
PlayStation Repairs diagnostic tool
What they doIf the USB update does not finish either, the PlayStation Repairs diagnosis records SU-42118-6 and the attempts made, to decide whether the console needs the workshop.
They must show youat which diagnosis step the repair was recommended.
In writingrequest number, date and the code recorded.
Repair through PlayStation Repairs
What they doSony's service checks in the workshop why the console will not install system software. Opening the PS4 or its power supply is left to them.
They must show youthe update test they repeated and its result after the repair.
In writingwhat was repaired or replaced, the part reference and the reason.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Follow these steps
Note: Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.
Power off the console and router with cables out
- Who:
- you.
- How:
- turn off the PS4 and unplug it. Switch off the router or modem, wait at least 5 minutes and turn it back on. Plug the console in again and restart it.
- Result that matters:
- the console starts and has a connection before you retry.
- If the update then progresses:
- it was a temporary console or router state.
- If SU-42118-6 returns:
- go on to deleting the update file.
- Evidence to keep:
- Time of the power cut, minutes waited and whether the code came back.
Evidence: PS4 error code SU-42118-6 (PlayStation Support)
Delete the update file from Notifications
- Who:
- you.
- How:
- in the PS4 function area open Notifications, highlight the update file, press OPTIONS and choose Delete. Then go to Settings > System Software Update.
- Result that matters:
- the console downloads a fresh file and installs it to the end.
- If it installs:
- the previous file was damaged or incomplete.
- If it fails again with the same code:
- the network download is unreliable and the USB route is next.
- Evidence to keep:
- Photo of the error screen and the version it tried to install, if shown.
Evidence: PS4 error code SU-42118-6 (PlayStation Support)
Update from a USB drive in Safe Mode
- Who:
- you, with a PC or Mac and a USB drive.
- How:
- format the drive as FAT32 or exFAT, create a PS4 folder with an UPDATE folder inside, and save Sony's official file as PS4UPDATE.PUP. Plug it in, start Safe Mode by holding the power button until the second beep and choose Update System Software > Update from USB Storage Device.
- Result that matters:
- the console recognises the file and installs the version.
- If it installs:
- the problem was only the internet download.
- If it does not recognise the file:
- check the folder and file names are in capitals, as Sony asks.
- Evidence to keep:
- Folder names, where the file came from and the install result.
Use only Sony's official file: another file or method can block the update and affect the warranty, according to Sony.
Evidence: How to update PS5 console and PS4 console system software in safe mode · How to update system software on a PS4 console
Still not solved
If the error persists, stop here. See what the technician must do and show you.
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- Gaming and consoles
- Brand
- PlayStation
- Product type
- PlayStation 4
Known code variants
- código de error SU-42118-6 PS4
- error al actualizar el software del sistema SU-42118-6
- error SU-42118-6 PlayStation 4
- issue when updating the system software SU-42118-6
- PlayStation 4 error code SU-42118-6
- PlayStation 4 SU-42118-6
- PlayStation error SU-42118-6
- PlayStation SU-42118-6
- PS4 error SU-42118-6
- PS4 SU-42118-6
What it means
Sony links SU-42118-6 to a problem while the PS4 updates its system software. Its steps point at three areas: the console's temporary state, the connection that downloads the file (router or modem) and the update file already on the console, which can be left half done. If none of that works, Sony sends you to the manual USB update in Safe Mode. The code does not say that a console part is faulty.
Warnings and stop conditions
- Mediumsource verified
Do not turn off the PS4 or remove the USB drive while the update installs. Use only Sony's official update file.
Evidence: How to update system software on a PS4 console
Symptoms and causes
Probable causes · in order
- Incomplete update fileCommon
Sony asks you to delete the file from Notifications before retrying. If the update finishes after that, the downloaded file was the problem.
Evidence: PS4 error code SU-42118-6 (PlayStation Support)
- Router or modem in a bad temporary statePossible
Ruled out by switching the router or modem off for at least 5 minutes. If the download then progresses, the fault was in the home network, not the console.
Evidence: PS4 error code SU-42118-6 (PlayStation Support)
- Download over the internet keeps failingPossible
When retries over the network fail, Sony offers installing the update from a USB drive in Safe Mode, without relying on the download.
Evidence: How to update PS5 console and PS4 console system software in safe mode · PS4 error code SU-42118-6 (PlayStation Support)
Virtual technician
Does SU-42118-6 still appear after these checks?
Answer a few questions to narrow down the likely cause and the safest next action. Guidance only - it never replaces a professional.
Sources and technical references
- 1
How to use Safe Mode on PS5 consoles and PS4 consoles
Sony Interactive Entertainment (playstation.com/en-us) · 2026 · official_doc
- 2
How to update PS5 console and PS4 console system software in safe mode
Sony Interactive Entertainment (playstation.com/en-us) · 2026 · official_doc
- 3
PS4 error code SU-42118-6 (PlayStation Support)
Sony Interactive Entertainment (playstation.com/en-us) · 2026 · official_doc
- 4
How to update system software on a PS4 console
Sony Interactive Entertainment (playstation.com/en-us) · 2026 · official_doc
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