Worx Landroid Error E4 — Outside Zone Fix

What Does This Error Mean?

Worx Landroid Error E4 means the mower has detected that it is outside its defined mowing zone — beyond the boundary wire perimeter. The mower stops and waits to be returned to the zone manually. Common causes include a loose boundary wire section that allowed the mower through, a slope that carried the mower over the wire, or the mower being carried outside the zone by a person.

Affected Models

Worx Landroid L WR153E
Worx Landroid M WR143E
Worx Landroid S WR130E
Worx Landroid Vision L700i
Worx Landroid WR167E

Common Causes

A section of boundary wire is too loose or elevated, allowing the mower to pass over it without detecting the boundary
A steep slope near the boundary allowed the mower to roll past the wire before stopping
The mower was manually carried outside its mowing area and set down outside the boundary
A wire connector inside the zone created a signal gap that the mower crossed
The boundary wire was temporarily disconnected and the mower was started without it

How to Fix It

Pick up the mower and carry it back to the charging station

When E4 is active, the mower will not drive itself back into the zone — it waits for manual intervention. Carry the mower back to the base station, dock it, and start a new mowing session from there.
Walk the perimeter to find where the mower crossed the boundary wire

Look for the location where the mower exited the zone. Check whether the boundary wire is flat on the ground, firmly stapled (or buried), and not elevated or looped. A section of wire that forms an arch or is lifted by grass growth can be crossed by the mower.
Re-secure any elevated or loose sections of boundary wire

Use boundary wire staples (pegs) to hold the wire flat against the ground. The wire should be at ground level or very slightly buried — never looped or suspended. Pay particular attention to sections near slopes, edges, and areas where grass grows thickly.
Adjust the boundary wire away from steep slopes at the perimeter

On slopes steeper than 35% near the boundary, the mower can sometimes roll past the wire during a turn. Move the boundary wire 20–30 cm further from the slope edge to give the mower more stopping distance on the descent.
Test the corrected zone with a manual mow start

After re-securing the wire, start a manual mowing session and observe the mower as it approaches the corrected section. It should stop and reverse at the boundary. If E4 recurs in the same location, the wire staples need closer spacing or the zone boundary needs to be moved further from the problem area.

Frequently Asked Questions

Will the Worx Landroid navigate back to the charging station automatically after E4?

No — with E4 active, the mower is outside its boundary and cannot navigate automatically. It parks in place and waits for you to physically carry it back inside the zone. Once returned to the working area and restarted, it will navigate normally.

How close to a slope edge should the Worx Landroid boundary wire be placed?

Worx recommends the boundary wire be placed at least 0.5–1.5 m (50–150 cm) from any drop-offs, steps, or steep slope edges. The exact minimum depends on the slope steepness. On steeper terrain (above 30%), increase the boundary setback to ensure the mower has enough stopping distance before the edge.