Space Marine 2 Error Code 4: Connection Lost [Solved]

The Warhammer 40,000: Space Marine 2 Error code 4 has become a common occurrence and prevents users from playing the newly released game, but there are few methods that can fix this problem.

How do I fix Space Marine 2 Error code 4?

Tip

Although the solutions listed below are for a Windows PC, equivalent measures will fix the Error code 4: Connection lost issue on any device, including Xbox and PS.

1. Sync the time

1. Press Windows + I to open Settings, go to Time & language from the left pane, and click on Date & time.
2. Click the Sync now button.
3. Once done, reboot the PC and then check for improvements.

If time synchronization fails, fix that first, and Space Marine 2 Error code 4 should not reappear!

2. Disable cloud saves for Space Marine 2

1. Open Steam, click on the Steam menu near the top left, and select Settings.
2. Go to the Cloud tab, and then disable the toggle for Enable Steam Cloud.
3. Reboot the PC, launch Steam, run Space Marine 2 and verify whether the Connection Lost error is fixed.

3. Switch to Google’s DNS

1. Press Windows + S to open Search, type Control Panel, and click on the relevant result.
2. Click on Network and Internet.
3. Now, click on Network and Sharing Center.
4. Select Change adapter settings from the left pane.
5. Right-click on the active network adapter, whether Wi-Fi or Ethernet, and choose Properties.
6. Select Internet Protocol Version 4 (TCP/IPv4), and click on Properties.
7. Select the Use the following DNS server addresses option, and enter the following details in the fields underneath:
   • Preferred DNS server: 8.8.8.8
   • Alternate DNS server: 8.8.4.4
8. Tick the checkbox for Validate settings upon exit, and click on OK to save the changes.

While I have switched to Google’s Public DNS to fix Space Marine 2 Error code 4, you can set the fastest DNS server near you.

After switching the DNS, be sure to test the Warhammer 40K Space Marine 2 ping to ensure that there’s no latency and that the servers are reachable.

4. Disable Steam overlay

1. Launch Steam, go to Library, right-click on Space Marine 2, and select Properties.
2. In the General tab, disable the toggle for Enable the Steam Overlay while in-game.
3. Relaunch Space Marine 2 and verify whether Error Code 4 is fixed on the PC.

5. Reset the network configuration

1. Press Windows + R to open Run, type cmd, and hit Ctrl + Shift + Enter.
2. Click Yes in the UAC prompt.
3. Paste the following commands individually and hit Enter after reach: ipconfig /release ipconfig /flushdns ipconfig /renew netsh int ip reset netsh winsock reset
4. Reboot the PC for the changes to come into effect.

If a quick reset doesn’t do, you should then reset the network adapter in Windows, which will clear out any misconfigurations in the network!

6. Reset the router to factory settings

For 3 out of 5 users, resetting the router did the trick when faced with Space Marine 2 Error code 4 on Xbox, PS, or PC. First, simply turn off the router, unplug it from the power source for a minute, then reconnect it and turn the router on.

If this doesn’t solve things, you will have to access the router’s interface/settings and reset the router to factory defaults.

7. Contact Space Marine 2’s support

When nothing else works, the last option is to contact Space Marine 2 support via the official website. You can also try some of the generic fixes listed there and check for improvements.

In my experience, the Space Marine 2 Error code 4 is usually a server-side problem, and any steps on your end will, in all likelihood, only temporarily resolve it. To completely eliminate the Connection Lost error, you will have to wait for a patch from the game’s developers.

Elsewhere, if you can’t join multiplayer sessions on Space Marine 2 due to error code 140, check out what to do in our detailed article.

Before you leave, discover expert tips to optimize the PC for gaming and enjoy a superior experience!

Which fix worked for you? Share with our readers in the comments section.