How to Fix 'Connection is Unstable' Error Messages in Splatoon 2

Players of Splatoon 2 may encounter a “Connection is Unstable” error message during online multiplayer matches. This error indicates that the network connection is not consistent enough to send and receive the data required for the game to function properly. According to Nintendo’s support documentation, this can happen if the internet connection is too slow, the Switch’s Wi-Fi signal is being obstructed, or network equipment is unresponsive.

Some Nintendo Switch titles are more sensitive to network fluctuations than others due to the amount of data they transfer during online play. A fast-paced shooter like Splatoon 2 requires a very stable connection to keep all players synchronized. The following steps can help diagnose and resolve the underlying causes of this error.

Basic System and Network Resets

Before adjusting network settings, performing simple resets on both the console and the network hardware can often resolve temporary issues. These steps clear out cached data and can fix minor software glitches that may be affecting connectivity.

Restart the Nintendo Switch

A full restart of the console can clear up transient problems. To do this, press and hold the power button on the top of the Switch unit for three seconds. A menu will appear on the screen. Select “Power Options” and then choose “Restart.” After the console has fully rebooted, launch Splatoon 2 and test the online multiplayer to see if the error persists.

Power Cycle the Modem and Router

If restarting the Switch does not solve the problem, the next step is to power cycle the network hardware. This process fully reboots the modem and router, which can resolve many common connectivity issues.

1. Unplug the power cable from the modem. If a separate router is in use, unplug its power cable as well.
2. Wait for at least 30 seconds. This allows the internal components to fully discharge and clear their temporary memory.
3. Plug the power cable back into the modem first. Wait for all of its indicator lights to become solid and show a stable connection, which can take several minutes.
4. If using a separate router, plug its power cable back in. Wait for its indicator lights to function normally.

Once the network hardware is back online, try playing Splatoon 2 again to check if the connection has stabilized.

Improving Your Wireless Connection

For most players, the Nintendo Switch connects to the internet via Wi-Fi. The stability of this wireless signal is the most common factor in connection quality. A weak or interrupted signal will frequently cause the “Connection is Unstable” error.

Reduce Physical Distance

The strength of a Wi-Fi signal decreases significantly with distance. For an optimal connection, Nintendo recommends that the Switch console be placed within 10 to 15 feet of the wireless router. If the console is far from the router, moving it closer, or moving the router to a more central location in the home, can provide a substantial improvement.

Remove Obstructions

Wi-Fi signals can be blocked or weakened by physical objects and electronic interference. Try to ensure a clear line of sight between the Switch and the router. Common sources of interference to move away from both the console and the router include:

• Large metal objects, such as filing cabinets or shelving.
• Major home appliances, especially microwaves, which operate on the same 2.4GHz frequency as many Wi-Fi networks.
• Cordless phone base stations.
• Aquariums, as the water can absorb Wi-Fi signals.
• Dense building materials like concrete, brick, or plaster walls.

Minimizing these obstructions can lead to a much stronger and more reliable signal.

Change Wireless Frequency Bands

Many modern routers can broadcast on two different frequency bands: 2.4GHz and 5GHz. Each has distinct advantages. The 2.4GHz band has a longer range and is better at penetrating solid objects, but it is more susceptible to interference from other household devices. The 5GHz band offers faster potential speeds and a less crowded signal but has a shorter range and is more easily blocked by walls.

If the router supports both, try switching the Switch’s connection to the band not currently in use. To do this, create a new internet connection on the console:

1. From the HOME Menu, go to “System Settings.”
2. Select “Internet,” and then “Internet Settings.”
3. The Switch will search for nearby Wi-Fi signals. Select the SSID (network name) corresponding to the other frequency band and enter the password.
4. The system will perform a connection test. If it passes, launch Splatoon 2 to see if performance has improved.

Switching to a Wired Connection

If wireless troubleshooting does not resolve the errors, the most stable solution is to use a wired Ethernet connection. A wired connection is not susceptible to the signal interference and degradation that affects Wi-Fi, making it ideal for competitive online games.

The Nintendo Switch does not have a built-in Ethernet port, so it requires a USB LAN adapter. These adapters plug into the USB ports on the Switch Dock. At the time, Nintendo officially licensed the Hori Switch Wired Internet LAN Adapter. Other compatible third-party options included the Plugable USB 3.0 to 10/100/1000 Gigabit Ethernet LAN Network Adapter and the UGREEN Network Adapter USB 3.0 to Ethernet RJ45 LAN Gigabit Adapter.

It is important to remember that a USB Ethernet adapter can only be used when the Nintendo Switch is in docked mode. For online play in portable or tabletop mode, the system must rely on a Wi-Fi connection.