ASUS Router Error Code 4: How to Fix It

Easy 10-20 minutes Medium Severity Verified June 2026
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Error Code
4
Brand
ASUS Router
Product Type
networking
Severity
Medium
DIY Difficulty
Easy
Estimated Fix Time
10-20 minutes
ASUS Router Error Code 4 indicates that the Game Boost feature is not active. This can reduce your gaming experience by not prioritizing network traffic. The error is usually due to incorrect settings or a disabled QoS feature.
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Tools You'll Need

How to Fix Error Code 4

  1. Check Game Boost Status in the Router Web Interface

  2. Enable QoS (Quality of Service) if Required

  3. Update Router Firmware

    Do not power off the router during the firmware update to avoid bricking the device.

  4. Power Cycle Your Router

  5. Reset Router to Factory Defaults (as last resort)

    This erases all custom settings including Wi-Fi passwords, so back up your configuration if possible.
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When to Call a Professional

If after factory reset and firmware update the error persists, the router hardware may be faulty. Contact ASUS support or consider replacing the router.

Frequently Asked Questions

What does ASUS Router Error Code 4 mean?
It means the Game Boost feature is not active. Game Boost prioritizes gaming traffic for better performance.
How do I enable Game Boost on my ASUS router?
Log into the router web interface, go to the Game section, and toggle Game Boost on. Some routers require QoS to be enabled first.
Will a factory reset fix Error Code 4?
Yes, but it should be a last resort after checking settings and updating firmware. It will erase all custom settings.
Is Error 4 serious?
No, it simply means Game Boost is off. Your internet will work normally, but gaming may have higher latency.
Can this error be caused by a virus?
No, it's a router feature setting issue. Viruses do not typically cause this error.

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