Mortal Kombat 1 Error Code MK1-CONN: How to Fix It
Easy 15-45 minutes Medium Severity
Verified June 2026
- Error Code
- mk1-conn
- Brand
- Popular Games
- Product Type
- game
- Severity
- Medium
- DIY Difficulty
- Easy
- Estimated Fix Time
- 15-45 minutes
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Tools You'll Need
- Ethernet cable
- Web browser (to access router admin panel)
- Speedtest.net or console built-in network test
- DownDetector.com (server status check)
How to Fix Error Code mk1-conn
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Check the Mortal Kombat 1 Server Status
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Restart the Game and Your Console or PC
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Restart Your Router and Modem
Do not hold the reset button on your router — this will erase your custom settings and return it to factory defaults. Simply unplug from power. -
Test Your Internet Connection Speed and Stability
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Switch to a Wired Ethernet Connection
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Check and Fix Your NAT Type
When setting a static IP or DMZ for your console, make sure to assign an IP address outside your router's DHCP range to avoid conflicts. Consult your router's manual for exact steps. -
Use a Different DNS Server
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Update Mortal Kombat 1 and Your System Software
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Clear the Game Cache (PC and Console)
Do not delete your game save data — only clear cache files. Back up your save data to cloud storage before performing any storage operations. -
Reinstall Mortal Kombat 1 as a Last Resort
Ensure your save data is backed up to the cloud before uninstalling. On PlayStation, enable PS Plus cloud saves. On Xbox, saves sync automatically to the cloud. On Steam, enable Steam Cloud in game properties.
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When to Call a Professional
If you have confirmed the Mortal Kombat 1 servers are online, have tried all troubleshooting steps, and the MK1-CONN error persists, contact WB Games Support at support.wbgames.com and submit a ticket with your platform, region, and a description of the steps you have already tried. If your internet connection itself is unstable (high packet loss or frequent drops unrelated to MK1), contact your Internet Service Provider (ISP) to inspect your line quality, as this is beyond a game-level fix.Frequently Asked Questions
What does the MK1-CONN error code mean in Mortal Kombat 1?
The MK1-CONN error means Mortal Kombat 1 failed to establish or maintain a connection to the game's online servers. It can be triggered by server outages, a weak or unstable internet connection, a strict NAT type, or a corrupted game installation.
Is MK1-CONN a server-side problem or is it my internet?
It can be either. First check the Mortal Kombat 1 server status on DownDetector.com or the official WB Games Twitter. If servers are reported down by many users, it is a server-side issue and you just need to wait. If servers are fine and only you are getting the error, it is likely a local network or game installation issue.
How do I fix MK1-CONN on PlayStation 5?
On PS5, start by restarting the game and console. Then go to Settings > Network > Test Internet Connection to check your connection. Ensure your NAT Type is 1 or 2 under Settings > Network > View Connection Status. Try switching to a wired Ethernet connection, changing your DNS to 8.8.8.8, and checking for game updates. If the problem persists, try reinstalling the game after backing up your save data to PS Plus cloud storage.
How do I fix MK1-CONN on Xbox?
On Xbox, go to Settings > General > Network Settings and confirm your NAT type is Open and your connection test passes. Restart your router and console, switch to a wired Ethernet connection if possible, and check for game updates under My Games & Apps. You can also try clearing persistent storage under Settings > Devices & Connections > Blu-ray > Persistent Storage > Clear Persistent Storage.
Will changing my DNS fix the MK1-CONN error?
Changing your DNS to Google (8.8.8.8) or Cloudflare (1.1.1.1) can help in some cases where your ISP's default DNS servers are slow or experiencing issues routing traffic to WB Games servers. It is a quick and free fix worth trying, though it is not guaranteed to resolve every instance of the MK1-CONN error.