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Navimow i2 AWD Error Code 5101: Unable to Connect GNSS Antenna

The mower cannot connect to the GNSS antenna required for mapping and navigation.

Reviewed October 4, 2026 by RobotMower.help. Independent guidance checked against the official manufacturer documentation.

Quick answer

Check that the GNSS antenna is properly connected to the charging station, then press STOP to clear the error.

If error 5101 returns after one controlled retry, stop repeating resets and record the mower serial number, firmware version, location, time, and a video of the behavior.

Error 5101 at a glance

What the error actually tells you

The mower cannot connect to the GNSS antenna required for mapping and navigation. The code identifies the system reporting a problem, but it does not automatically prove that a specific part has failed.

For code 5101, focus first on a loose antenna connection, charging-station connection issue, damaged cable, or antenna communication fault. Use reversible external checks before changing maps, moving equipment, or requesting service.

Fix Navimow i2 AWD error 5101 step by step

1. Press STOP. Make the mower safe before touching or moving it.
2. Save the evidence. Photograph the exact message and note the battery level, task, weather, and yard location.
3. Inspect the relevant area. Check for a loose antenna connection, charging-station connection issue, damaged cable, or antenna communication fault.
4. Follow the official first action. Check that the GNSS antenna is properly connected to the charging station, then press STOP to clear the error.
5. Run one short supervised test. Stay close enough to stop the mower if its movement or positioning is abnormal.
6. Escalate a repeat code. If 5101 returns, stop repeated attempts and contact Navimow support.

How to identify the underlying cause

The error appears once

A single occurrence can follow a temporary interruption or difficult operating condition. Complete the official steps and supervise one short task.

The error repeats in one location

Inspect that exact spot for terrain problems, obstacles, poor clearance, satellite obstruction, or restrictive map geometry. A location-specific pattern is valuable diagnostic evidence.

The error appears everywhere

An immediate or yard-wide recurrence is less likely to be one isolated terrain problem. Record the serial number, firmware and app versions, date and time, and a clear video before contacting support.

Safety and mistakes to avoid

Turn the mower off before checking wheels, blades, the underside, sensors, cables, or charging contacts. Do not open the battery pack or sealed electronics. Do not repeatedly factory-reset, remap, force moving parts, or improvise electrical tests unless official support specifically instructs you to do so.

Frequently asked questions

What does Navimow i2 AWD error 5101 mean?

The mower cannot connect to the GNSS antenna required for mapping and navigation.

What should I do first for error 5101?

Check that the GNSS antenna is properly connected to the charging station, then press STOP to clear the error.

Can I keep mowing after error 5101?

Only after the code clears and the mower completes a short supervised test without abnormal movement, charging, positioning, or safety behavior.

When should I contact Navimow support?

Contact support when the code returns after the official first steps, appears immediately after restart, or the mower cannot operate safely.

Related Navimow guides

• Navimow troubleshooting hub
• Robot mower error-code library
• Navimow i2 AWD error 6109
• Navimow i2 AWD error 7102

Primary source

Segway Navimow support documentation for error 5101. RobotMower.help is independent and is not affiliated with Segway Navimow.