Nintendo Switch Error Code 2155-0005 — What It Means & How to Fix It

What Does This Error Mean?

Error 2155-0005 means your Nintendo Switch lost its connection to an online game server. You were either booted from an online session or could not join one. This is usually a network stability issue rather than a problem with the Switch itself.

Affected Models

Nintendo Switch
Nintendo Switch Lite
Nintendo Switch OLED

Common Causes

Your Wi-Fi signal is too weak or unstable to maintain a persistent online game connection
Your internet service has a high ping or packet loss that is causing connection drops
The game's online servers are temporarily down or experiencing high traffic
Your router's NAT type is Strict, which prevents stable connections to game servers
You are too far from your router and the signal drops intermittently during play

How to Fix It

Move your Switch closer to your Wi-Fi router. Walls and distance significantly weaken Wi-Fi signals, causing connection drops during online play.

Test right next to the router first. If the drops stop, distance or interference is the cause.
Check your NAT type. Go to System Settings > Internet > Test Connection. Your NAT type should be A or B for stable online gaming.

NAT type C or D will cause frequent online disconnections. Enable UPnP on your router to improve your NAT type.
Restart your router and Switch. Unplug the router for 30 seconds, wait for it to fully reconnect, then restart the Switch.

Clearing the router's routing tables can resolve temporary connection instability.
Run an internet speed test on another device. Use fast.com or speedtest.net. For smooth online gaming, you need at least 5 Mbps download and an acceptable ping under 80ms.

High ping (latency) causes in-game lag and disconnections even on fast connections.
If possible, connect your Switch via a USB Ethernet adapter. A wired connection is dramatically more stable for online gaming than Wi-Fi.

Nintendo sells an official USB Ethernet adapter, and third-party options work too. The Switch's USB-C dock supports USB Ethernet adapters.

When to Call a Professional

Error 2155-0005 is a network issue and does not require hardware repair. If the problem is persistent even with a good connection, contact Nintendo Support at 1-800-255-3700 or the game's support team for server status information.

Frequently Asked Questions

Why do I get disconnected from online games but not during normal internet use?

Online games are much more sensitive to connection quality than browsing or streaming. A brief drop that you would never notice while watching YouTube is enough to disconnect an online gaming session. For consistent online play, a wired connection or a strong, stable Wi-Fi signal is essential.

Does Nintendo Switch Online subscription affect connection quality?

No. Your Nintendo Switch Online subscription only grants you access to play online — it does not affect your connection speed or stability. The quality of your online gaming experience depends entirely on your home internet connection and proximity to game servers.

What NAT type is best for Nintendo Switch online gaming?

NAT Type A is the best — it means your Switch has an open connection to all servers. NAT Type B is also good and works for all standard online gaming. NAT Type C and D are more restricted and will cause connection issues with many online games. Enabling UPnP in your router settings usually achieves NAT Type A or B.