A Switch Lite connects only over Wi-Fi, as it has no dock and no LAN port, so every online problem is a wireless problem. Run the built-in test first: System Settings, Internet, Test Connection, which reports the signal strength, the connection and the NAT type. A low signal means you should move closer or reduce interference; a failed test often points at the router. Restart the router and the console, then forget the network and join it again with the password. If it connects but is slow, try changing the DNS to a public server in the network's settings, and make sure the router is not blocking the Switch.
Nintendo's test shows the error code, and the code names the cause. For online games a NAT type of A or B is best, and D can block matches. If the Switch Lite connects at home but not elsewhere, the difference is usually a login page, as on hotel and campus networks, which the console can open from Internet Settings by selecting the network and choosing the Connect option. If downloads are slow but other devices are fast, check that the console is not on a congested 2.4 GHz channel and that the router's Wi-Fi is not set to a mode the Switch cannot use.
Differential
Likely causes of “Nintendo Switch Lite cannot connect online or has strict NAT”, and how to tell them apart
- 1
A weak Wi-Fi signal
What separates it The test shows a low signal
How to confirm Move closer or add coverage
- 2
A router needing a restart
What separates it The console cannot connect while others can
How to confirm Restart the router
- 3
Wrong password or a changed network
What separates it Authentication fails
How to confirm Forget the network and re-enter the password
- 4
DNS problems
What separates it Connected but pages or downloads fail
How to confirm Set the DNS manually to a public server
- 5
A strict NAT type
What separates it Online matches fail
How to confirm Enable UPnP on the router
Before you touch a setting
Record this first — changing settings destroys the evidence
- The error code
- The signal strength
- The NAT type
- Whether other devices connect
Try in this order
0 of 9 completedRun Test Connection
ReversibleSystem Settings, Internet, Test Connection.
Restart the router and the console
ReversiblePower both off for a minute.
Forget the network
ReversibleRemove it in Internet Settings and rejoin.
Move closer to the router
ReversibleReduce walls between them.
Set a manual DNS
ReversibleUse a public DNS server in the network settings.
Enable UPnP for NAT type
ReversibleCheck the router's settings.
Check other devices
ReversibleTest a phone on the same network to see whether the problem is the router or the console alone.
Try the 2.4 GHz band
ReversibleThe Lite can join 5 GHz, but 2.4 GHz travels further through walls, so use it if the signal is weak.
Test the speed on the console
ReversibleThe connection test reports download and upload speeds, which you can compare with a phone's speed test.
Model-specific
What is true of this model and not of its siblings
- Wi-Fi only
- The Lite has no dock, so there is no wired option.
- Error codes
- The code from the test narrows the cause.
- Public networks
- A hotel or campus network may need a web login before the console gets online.
- The error code
- The code shown by the test names the cause and is the best thing to search for.
- Router modes
- Older Wi-Fi modes only on the router can limit the console's speed.
Stop boundary
When this stops being a self-service repair
- !If the code persists after a router restart, note it for Nintendo
- !If the router is the issue, ask the maker
- !A hardware Wi-Fi fault needs a repair
Evidence ledger
Sources behind this answer
Exact questions
Common questions
Can the Switch Lite use a LAN cable?+
No, it has no LAN adapter and cannot dock.
What is a NAT type?+
How well the console can connect to others online.
Why does the test show a low signal?+
Distance, walls or interference.
Will changing DNS help?+
It can help with failing downloads.
Can the Lite use 5 GHz Wi-Fi?+
Yes, it joins both 2.4 and 5 GHz networks.
Why does it connect but downloads fail?+
DNS or router problems; a manual DNS often helps.
Can I see my Switch speed?+
Yes, the connection test shows it.