The ERROR 205 error on your Sonos Soundbar means the device has lost connection to your home network or Sonos system, often during a software update or when trying to stream audio. Restarting your router and soundbar in the correct order usually resolves it within a few minutes.

Error code ERROR 205
Meaning Network connectivity failure between the Sonos Soundbar and your Wi-Fi router or Sonos app
Severity Medium — playback stops but no permanent damage occurs
Time to fix 5–20 minutes
Tools needed Smartphone or tablet with the Sonos app, stable Wi-Fi connection

What the ERROR 205 error means

Error 205 appears when your Sonos Soundbar cannot maintain a stable link to your home network. This can happen mid-song, during setup, or while the system tries to download a firmware update. The soundbar itself is usually fine — the issue almost always sits with your router, Wi-Fi signal strength, or network configuration.

Because Sonos soundbars rely on a continuous network connection to stream music and receive commands, even a brief drop can trigger this error and interrupt playback until the connection is restored.

Common causes

  • Wi-Fi router has been restarted, reset, or changed passwords recently
  • Soundbar is too far from the router or blocked by walls/furniture
  • Too many devices competing for bandwidth on the same network
  • Outdated Sonos app or soundbar firmware
  • Router firewall or network settings blocking Sonos multicast traffic
  • Temporary outage from your internet service provider

How to fix the ERROR 205 error

  1. Restart the soundbar: Unplug it from the power outlet, wait 30 seconds, then plug it back in and let it fully reboot.
  2. Restart your router: Power cycle your router and modem, waiting at least a minute before turning them back on. This clears many temporary network glitches.
  3. Check Wi-Fi signal strength: Move the soundbar closer to the router or remove obstructions if the connection seems weak.
  4. Update the Sonos app and firmware: Open the Sonos app, go to Settings, and check for available system updates. Install any pending updates.
  5. Reconnect the soundbar to your network: In the Sonos app, go to Settings > System > Networking and re-add the soundbar to your Wi-Fi network if it appears disconnected.
  6. Review router settings: Ensure multicast and UPnP are enabled, as Sonos devices depend on these for communication. Disable any strict firewall rules temporarily to test.

If you’re also troubleshooting other Sonos issues, you may find these guides useful: Sonos Soundbar ERROR Error Code: Causes and Fixes, Sonos Soundbar ERROR Error Code: Causes and Fixes, and Sonos Soundbar ERROR Error Code: Causes and Fixes. For general connectivity comparisons across brands, see Sonos Soundbar ERROR Error Code: Causes and Fixes or check how similar issues appear on other devices in the Hisense Smart NO Error Code: Causes and Fixes guide.

FAQ

Why does my Sonos Soundbar keep showing error 205 even after restarting?
A. This usually means the underlying network issue hasn’t been resolved. Check for ISP outages, router firmware updates, or interference from other wireless devices.

Does error 205 mean my soundbar is broken?
A. No. This error is almost always related to network connectivity, not a hardware fault with the soundbar itself.

Can I prevent error 205 from happening again?
A. Keep your router firmware updated, position your soundbar within good Wi-Fi range, and regularly update the Sonos app to reduce the chance of connectivity errors.