Display shows E2 and the mower stops near the boundary; it may not recognize the perimeter correctly.

Safety first: Switch the iMOW main switch to OFF and unplug the docking station before inspection.

• Check for metal interference: Ensure the perimeter wire is not laid directly over metal drainage covers, steel edging, or buried cables. If it is, reroute the wire at least 30–40 cm away from such objects.
• Inspect all connectors: Open any in-line connectors or junctions in the perimeter wire. Look for green/white corrosion or loose conductors. Replace suspect connectors with new Stihl gel-filled connectors.
• Measure loop resistance: Disconnect the loop from the base and measure resistance end-to-end with a multimeter. Compare with Stihl’s specification for your loop length (typically a few ohms). A significantly higher reading indicates poor joints or partial breaks.
• Shorten test loop: To rule out the base station, create a short test loop (5–10 m) of new wire connected to the docking station. If the E2 code disappears with the test loop, the original perimeter wire is at fault.
• Replace damaged sections: Cut out any suspect wire segments and replace with new Stihl perimeter wire, using waterproof connectors.

If the error persists even with a short test loop, the docking station loop generator or control board is likely defective and should be replaced by a qualified technician.