E16
Honda Wheel Encoder / Speed Sensor Fault

Robot mower shows E16 and stops with the message related to wheel sensor or speed error.

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Dirty or damaged wheel encoder disc, Faulty wheel speed sensor, Loose encoder connector, Damaged drive motor assembly

How to Fix / Troubleshooting

Safety first: Turn OFF the mower and remove the key. Lift the mower only by designated handles.

  • Inspect wheel hubs: Remove the affected wheel (refer to the service manual). Check for an encoder disc or magnet ring and a nearby sensor.
  • Clean encoder: Remove grass, mud, or debris from the encoder disc and sensor area using a soft brush.
  • Check sensor wiring: Ensure the encoder sensor cable is intact and firmly connected to the main PCB.
  • Reassemble and test: Refit the wheel, power ON the mower, and run a short test. If E16 reappears, the sensor or motor assembly may be defective.

Replace the wheel motor/encoder assembly or the separate encoder sensor as specified by Honda for your model.

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Repair Difficulty

Hard 4/5

Required Part

Wheel Encoder Sensor
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