A Segway or Ninebot error code is a number the dashboard flashes, usually with a beep, when the controller detects a fault. In Segway's own list, 10 is a dashboard communication fault, 14 the throttle sensor, 15 the brake lever sensor, 18 the motor's Hall sensor, 21 battery communication and 39 battery temperature. At our shops a simple inspection is free, and fixing the fault behind a code starts at $35.
Below is every code Segway publishes for its E2 Pro, what our technicians check for each one when the electric scooter comes in, and what the repair costs. Segway's newer manuals, such as the Max G2's, say the dashboard shows the code and the Segway-Ninebot app explains it for your model, so a few numbers can mean different things on different models.
One safety rule first: if your electric scooter shows a battery temperature code, or the battery is swollen, wet or smells hot, don't ride it and don't charge it. Bring it straight in.
What do Segway Ninebot error codes mean?
| Code | What Segway says it means | What our technicians check | From |
|---|---|---|---|
| 10 | The dashboard isn't communicating normally | The dashboard wiring harness and its connector pins, then the dashboard unit and the controller | $35 |
| 11, 12, 13 | Controller fault | Controller power and signal lines, then the controller itself | $35 |
| 14 | Throttle Hall sensor fault | Whether the throttle returns fully, the throttle sensor and its wiring | $50 |
| 15 | Brake lever Hall signal fault | Whether the brake lever returns fully, the lever sensor and its wiring | $35 |
| 18 | Motor Hall sensor fault | The motor-to-controller connection, the Hall sensors and the phase wires | $100 |
| 21 | Battery communication error | The battery-to-controller connection, then a battery test | $50 test |
| 23 | Abnormal battery condition | The battery status Segway's app reports and its firmware, then a battery test | $50 test |
| 35 | Controller fault | The controller and its connections | $35 |
| 39 | Battery temperature out of range | Battery temperature and a battery test | $50 test |
| 40, 45 | Controller fault | The controller and its connections | $35 |
| 42 | Motor not calibrated | Run Segway's motor calibration, then the motor sensors | $35 |
| 50 | Motor fault | The motor wiring harness and the motor | $100 |
| 51 | Controller overvoltage, most often from a charger that isn't the one made for the model | The charger, the charging port and the controller | $35 |
| 52 | The motor can't turn | The motor, tested against a known-good motor, then the controller | $100 |
| 53, 54 | Controller overcurrent, most often from overloading | Load, the motor and the controller | $35 |
Meanings from Segway's E2 Pro Self Test Manual (support.segway.com), in our words. "From" prices are our starting prices for the matching repair, parts and labor included; the final price depends on the model and part. Codes 16 and 24 aren't in Segway's published list; see below.
What do Segway error codes 16 and 24 mean?
Segway doesn't publish them in the self-test list above, and its product manuals send owners to the Segway-Ninebot app, which shows the code and its likely causes for that exact model. We don't guess at them here, because code meanings can differ from one Segway model to the next. Our technicians read the code with the electric scooter in front of them, and the error code fix still starts at $35.
What do the communication and controller codes mean (10, 11–13, 35, 40, 45)?
The controller is the electric scooter's brain, and it talks constantly to the dashboard, the battery and the motor. Code 10 means the dashboard has stopped answering properly. Segway's list traces it to the dashboard wiring harness, its connector pins, the dashboard unit or the controller, in that order. Codes 11, 12, 13, 35, 40 and 45 are faults inside the controller itself, and Segway's own advice for each is to contact after-sales service.
What we check when it comes in: the harness and pins first, because a loose or bent connector is cheaper to fix than a part, then the dashboard, then the controller. Wiring harness and connector repair starts at $35, controller replacement at $35, and dashboard and display repair at $100.
What do the throttle and brake codes mean (14 and 15)?
Both come from Hall sensors, small magnetic sensors that tell the controller where the throttle and brake lever are. Code 14 is the throttle sensor and code 15 the brake lever sensor. Segway notes that either code can appear if the throttle or lever isn't fully back in its rest position when the electric scooter switches on.
What we check: how the throttle and lever move and return, then the sensor, then the wiring back to the controller. Throttle repair starts at $50 and a brake cutoff switch at $35. If the brakes themselves feel weak, see brake repair, what we check and what it costs.
What do the motor codes mean (18, 42, 50, 52)?
- 18: the controller can't read the motor's Hall sensors, which report the motor's position.
- 42: the motor hasn't been calibrated to the controller.
- 50: a fault in the motor.
- 52: the motor can't turn.
What we check: the connection between the motor and the controller, the Hall sensors and phase wires, calibration, and then the motor itself, tested against a known-good one. Hall sensor and phase wire repair starts at $100 and motor repair at $100. More detail in electric scooter motor repair.
What do the battery codes mean (21, 23, 39)?
Code 21 means the controller isn't hearing from the battery properly, 23 means the battery is reporting an abnormal condition, and 39 means the battery's temperature is outside its safe range (Segway gives -10 °C to 50 °C, about 14 °F to 122 °F, for the surroundings).
What we check: the battery-to-controller connection, what the battery reports, and then a battery load, capacity and discharge test, from $50. The test tells you exactly where the battery stands before any repair is quoted. With code 39, or any battery that looks swollen, is wet or smells hot, don't ride or charge it: bring it straight in.
What do the power codes mean (51, 53, 54)?
Code 51 is overvoltage at the controller, and Segway says the most common cause is a charger that isn't the one made for that model. Codes 53 and 54 are overcurrent at the controller, most often from overloading: too much weight or too steep a climb for the electric scooter. What we check: the charger and charging port for 51 (charging port repair from $35, charger replacement from $35), and the load, the motor and the controller for 53 and 54.
How much does it cost to fix a Segway error code?
Looking it over and telling you what we find is always free. Fixing the fault behind an error code starts at $35. Our technicians repair Segway and Ninebot electric scooters wherever you bought them, with express service at every shop. Starting prices, parts and labor included:
| Service | From |
|---|---|
| Simple inspection, any brand, any issue | Free |
| Full diagnosis with disassembly or test equipment | $30, waived on repairs over $100 |
| Error code fix | $35 |
| Wiring harness and connector repair | $35 |
| Controller replacement | $35 |
| Brake cutoff switch | $35 |
| Charging port repair | $35 |
| Throttle repair | $50 |
| Battery load, capacity and discharge test | $50, waived if the repair quote is over $100 |
| Dashboard and display repair | $100 |
| Hall sensor and phase wire repair | $100 |
| Motor repair | $100 |
Every price is a starting price; the final price depends on the model and part. See every price in our repair price guide.
Bought your Segway from us? Segway is a brand we carry, so it has a year of warranty cover for manufacturing defects, and we manage the claim with Segway for you. Wear items, water damage, crashes, misuse and unauthorized repairs aren't covered; see our warranty policy.
Where can you get a Segway error code fixed?
Walk in at any of our shops in New York City (Flushing, Elmhurst, Brooklyn and Long Island City) or San Francisco; no appointment is needed, and you can also book by text, phone, email or online. Book a repair or find a shop. If your Segway shows nothing at all, read electric scooter won't turn on or charge, and for everything else we fix on these models, see Segway and Ninebot electric scooter repair.
Shopping for a new one? We sell Segway too: browse Segway electric scooters, from the Segway E2 Pro to the Segway Max G2, with free shipping to the lower 48 states, or compare them in which Segway electric scooter to buy.
Frequently asked questions
What does error code 10 mean on a Segway?
The dashboard isn't communicating normally with the controller. We check the dashboard harness and connector pins first, then the dashboard and the controller. The error code fix starts at $35.
What does error code 14 mean on a Ninebot?
A fault with the throttle's Hall sensor, the part that tells the controller how far the throttle is pressed. We check the throttle, the sensor and its wiring; throttle repair starts at $50.
What does error code 21 mean on a Segway?
The controller isn't communicating properly with the battery. We check the connection and run a battery test, from $50.
What does error code 39 mean on a Segway?
The battery temperature is outside its safe range. Don't ride or charge it; bring it in for a battery test, from $50.
Can I keep riding with an error code showing?
A code means the controller has found a fault, so treat it as a reason to stop. Don't ride or charge with a battery code, and don't ride with a brake code: bring it in. A simple inspection at our shops is free.
Do you fix Segways that weren't bought from Wilson's?
Yes. We repair any brand, wherever you bought it, at every shop.
Sources: Segway, E2 Pro Self Test Manual (support.segway.com); Segway, Ninebot KickScooter Max G2 Product Manual; Wilson's repair price list and warranty policy. Checked October 2026.
