i9/S9/S9pro/S9max electric scooter error code E04 short circuit fault--Controller error E10 Controller/Board Fault-Controller Error E11 Motor phase A current sensor abnormal: motor error E12 Abnormal motor phase B current sensor: battery error E13 Abnormal motor phase C current sensor: motor error E14 Throttle error brake error E15 E16 Hall fault--Motor error If the series scooters have the above error code, please replace the corresponding accessory according to the detailed problem. For the other scooter models and you can't figure it out, please send some photos or videos to our customer service mail, our product experts will help you confirm the details and give you a proper solution.