Honda Miimo HRM520: Lift / tilt / collision safety fault

What this fault means

Safety sensing remains active after the mower is returned to normal position.

Safety: Stop the mower and follow the manufacturer safety instructions before physical inspection.

Step-by-step checks

1. Place the mower on level ground.
2. Inspect movable body/bump elements for binding/debris.
3. Clear only accessible contamination.
4. Restart once sensors return to neutral.
5. Persistent safety fault should be serviced; do not bypass the sensor.

Evidence source: Manufacturer/support reference

Evidence checked 2026-08-25. Diagnostic procedures are labelled separately from manufacturer-exact error instructions.

Did one of these checks actually fix the mower?

Confirmed repair outcomes improve MowerFixAI for the next owner and help separate common symptoms from real component failures.