Error code on your fatbike? Here’s how to fix it
Is there an error code on your display? Choose your display, search for the code and immediately see what it means and what you can do yourself. If you can't figure it out, ask the technical support or send us a WhatsApp message.
1Choose your display
2Search for your error code
Often solvable yourselfOften requires replacing a partLet the workshop take a look
Fault per modelBike not working without an error code? Choose your model or problemManualsPDF per model, including display settingsWorkshop appointmentParts in stock, often ready the same day
Technical supportTell me your display and code, I will give you advice immediately
All error codes per display
Below you will find all error codes per display in one place, with the meaning, the most common causes and what you can do yourself.
Ouxi HC80 error codes Ouxi V8 4.0, C80, C80 Pro, C80 Mini
| Code | Meaning | Possible causes | What can you do |
|---|---|---|---|
| E00 |
Normal operation No fault. The display reports that everything is working normally. |
- | You don't need to do anything. |
| E02 |
Brake engaged or brake sensor The controller sees that the brakes are applied and turns off the motor for your safety. |
Brake lever stays engaged, Brake sensor (brake switch) defective or displaced, Brake sensor plug loose | Turn off the bike, let both brake levers fully release and turn it on again. Check if a brake lever stays engaged or does not fully spring back. Check the plugs of the brake sensors at the handlebars. |
| E05 |
Voltage too high The battery voltage is too high for the controller. |
Wrong charger used, Battery or BMS defective, Controller defective | Only use the original charger. Let the battery rest for a while after charging and turn the bike on again. Does the code persist? Have the battery and charger tested. |
| E06 |
Undervoltage The controller receives too little voltage from the battery. |
Battery empty, Interconnecting cable from battery to controller loose or broken, Battery contacts dirty or damaged, Battery defective (does not hold voltage) | Charge the battery fully. Remove the battery and check the contacts for dirt, moisture or damage. Check the interconnecting cable and plug from the battery to the controller. Does a fully charged battery still show this code? Then the battery or the interconnecting cable is probably defective. |
| E07 |
Hall-sensor motor The controller does not receive a good signal from the sensors in the motor. The bike jerks or no longer provides assistance. |
Motor plug at the rear axle damp or damaged, Motor cable damaged, Hall sensor in the motor defective | Check the motor plug at the rear axle for moisture, rust or bent pins. Check if the motor cable is damaged anywhere. Does the code persist? Have the motor tested in the workshop. |
| E08 |
Throttle lever The throttle lever (pedal assist) gives a wrong signal, or was pressed when turning on. |
Throttle lever pressed when turning on, Throttle lever plug loose, Throttle lever defective | Turn off the bike, do not touch the throttle lever and turn it on again. Check the throttle lever plug at the handlebars. Does the code persist? Then the throttle lever probably needs to be replaced. |
| E09 |
Controller or overload The controller, the electronic brain of the bike, reports an error. |
Controller overheated after a heavy ride, Loose plug on the controller, Controller defective | Reset the bike: remove the battery, wait 1 minute, put the battery back. Let the bike cool down if you have just had a heavy ride. Check the large plugs of the controller. Does the code persist? Then the controller is probably defective. |
| E10 |
Communication between display and controller (sometimes E010) Display and controller do not have a good connection with each other. |
Display plug loose or damp, Wiring harness damaged, Pedal sensor or the interconnecting cable of the pedal sensor, Display defective, Controller defective | Disconnect the display plug from the handlebars and connect it firmly again. Check the wiring harness at the handlebars and the frame for kinks, moisture or damage. Check the pedal sensor plug and the interconnecting cable at the pedal crank. Does the code persist? Then the display, the wiring harness or the controller is defective. |
| E16 |
Short circuit contact lock Short circuit in the contact lock or the wiring leading to it. |
Moisture in the contact lock, Damaged wires, Wiring harness defective | Turn off the bike and check the contact lock for moisture. Check the wires to the contact lock for damage. Have the wiring checked if the code persists. |
| E21 |
Controller overcurrent The controller draws too much current, due to a heavy climb, short circuit or a motor fault. |
Heavy load or climb, Short circuit in motor or wiring, Controller defective | Turn off the bike and let it cool down for 10 to 15 minutes. Then ride away gently in a low setting. Does the code return? Have the workshop test the motor and controller. |
Ouxi M5 (old variant) error codes Ouxi V8 2.0 and 3.0 (older version), also many imitation M5 displays
There are two versions of the M5 display with different codes. In this old variant, E07 is the motor. Not sure which one you have? Send a photo via WhatsApp.
| Code | Meaning | Possible causes | What can you do |
|---|---|---|---|
| E00 |
Normal operation No fault. The display reports that everything is working normally. |
- | You don't need to do anything. |
| E02 |
Brake or brake sensor The controller sees that the brakes are applied and turns off the motor for your safety. |
Brake lever stays engaged, Brake sensor (brake switch) defective or displaced, Brake sensor plug loose | Turn off the bike, let both brake levers fully release and turn it on again. Check if a brake lever stays engaged or does not fully spring back. Check the plugs of the brake sensors at the handlebars. |
| E03 |
Pedal sensor The pedal sensor does not give a good signal, causing pedal assistance not to work. |
Pedal sensor plug loose, Pedal sensor interconnecting cable damaged, Pedal sensor defective or displaced | Check the pedal sensor plug and interconnecting cable at the pedal crank. Check if the magnet ring at the pedal crank is properly attached. Does the code persist? Replace the pedal sensor. |
| E06 |
Undervoltage The controller receives too little voltage from the battery. |
Battery empty, Interconnecting cable from battery to controller loose or broken, Battery contacts dirty or damaged, Battery defective (does not hold voltage) | Charge the battery fully. Remove the battery and check the contacts for dirt, moisture or damage. Check the interconnecting cable and plug from the battery to the controller. Does a fully charged battery still show this code? Then the battery or the interconnecting cable is probably defective. |
| E07 |
Motor fault The motor reports a fault, or the controller does not have a connection with the motor. |
Motor plug loose or damp, Motor cable damaged, Motor defective, Controller defective | Check the motor plug for moisture or loose pins. Check the motor cable at the rear axle for damage. Do not ride further with assistance and have the motor tested. |
| E08 |
Throttle lever The throttle lever (pedal assist) gives a wrong signal, or was pressed when turning on. |
Throttle lever pressed when turning on, Throttle lever plug loose, Throttle lever defective | Turn off the bike, do not touch the throttle lever and turn it on again. Check the throttle lever plug at the handlebars. Does the code persist? Then the throttle lever probably needs to be replaced. |
| E09 |
Controller The controller, the electronic brain of the bike, reports an error. |
Controller overheated after a heavy ride, Loose plug on the controller, Controller defective | Reset the bike: remove the battery, wait 1 minute, put the battery back. Let the bike cool down if you have just had a heavy ride. Check the large plugs of the controller. Does the code persist? Then the controller is probably defective. |
| E10 |
Communication: display receives nothing Display and controller do not have a good connection with each other. |
Display plug loose or damp, Wiring harness damaged, Pedal sensor or the interconnecting cable of the pedal sensor, Display defective, Controller defective | Disconnect the display plug from the handlebars and connect it firmly again. Check the wiring harness at the handlebars and the frame for kinks, moisture or damage. Check the pedal sensor plug and the interconnecting cable at the pedal crank. Does the code persist? Then the display, the wiring harness or the controller is defective. |
| E11 |
Communication: controller receives nothing Display and controller do not have a good connection with each other. |
Display plug loose or damp, Wiring harness damaged, Pedal sensor or the interconnecting cable of the pedal sensor, Display defective, Controller defective | Disconnect the display plug from the handlebars and connect it firmly again. Check the wiring harness at the handlebars and the frame for kinks, moisture or damage. Check the pedal sensor plug and the interconnecting cable at the pedal crank. Does the code persist? Then the display, the wiring harness or the controller is defective. |
| E12 |
Battery communication (BMS) The display does not receive data from the battery (BMS). |
Battery not properly placed, Battery contacts or interconnecting cable, BMS in the battery defective | Remove the battery and place it again. Check the contacts and the interconnecting cable of the battery. Does the code persist? Have the battery tested. |
| E13 |
Headlight Fault in the lighting. |
Headlight plug loose, Headlight or cable defective | Check the plug and cable of the headlight. Replace the headlight if the code persists. |
Ouxi M5 (new variant) error codes Ouxi V8 2.0, 3.0 and H9 (newer version)
In this new variant, E01 is the motor (in the old variant, that was E07). Not sure which one you have? Send a photo via WhatsApp.
| Code | Meaning | Possible causes | What can you do |
|---|---|---|---|
| E01 |
No connection between motor and controller The motor reports a fault, or the controller does not have a connection with the motor. |
Motor plug loose or damp, Motor cable damaged, Motor defective, Controller defective | Check the motor plug for moisture or loose pins. Check the motor cable at the rear axle for damage. Do not ride further with assistance and have the motor tested. |
| E02 |
Brake or brake sensor The controller sees that the brakes are applied and turns off the motor for your safety. |
Brake lever stays engaged, Brake sensor (brake switch) defective or displaced, Brake sensor plug loose | Turn off the bike, let both brake levers fully release and turn it on again. Check if a brake lever stays engaged or does not fully spring back. Check the plugs of the brake sensors at the handlebars. |
| E03 |
Controller The controller, the electronic brain of the bike, reports an error. |
Controller overheated after a heavy ride, Loose plug on the controller, Controller defective | Reset the bike: remove the battery, wait 1 minute, put the battery back. Let the bike cool down if you have just had a heavy ride. Check the large plugs of the controller. Does the code persist? Then the controller is probably defective. |
| E04 |
Brake sensor or brake cable The controller sees that the brakes are applied and turns off the motor for your safety. |
Brake lever stays engaged, Brake sensor (brake switch) defective or displaced, Brake sensor plug loose | Turn off the bike, let both brake levers fully release and turn it on again. Check if a brake lever stays engaged or does not fully spring back. Check the plugs of the brake sensors at the handlebars. |
| E05 |
Voltage (battery) The controller receives too little voltage from the battery. |
Battery empty, Interconnecting cable from battery to controller loose or broken, Battery contacts dirty or damaged, Battery defective (does not hold voltage) | Charge the battery fully. Remove the battery and check the contacts for dirt, moisture or damage. Check the interconnecting cable and plug from the battery to the controller. Does a fully charged battery still show this code? Then the battery or the interconnecting cable is probably defective. |
| E06 |
Communication: display receives nothing Display and controller do not have a good connection with each other. |
Display plug loose or damp, Wiring harness damaged, Pedal sensor or the interconnecting cable of the pedal sensor, Display defective, Controller defective | Disconnect the display plug from the handlebars and connect it firmly again. Check the wiring harness at the handlebars and the frame for kinks, moisture or damage. Check the pedal sensor plug and the interconnecting cable at the pedal crank. Does the code persist? Then the display, the wiring harness or the controller is defective. |
| E07 |
Communication: controller receives nothing Display and controller do not have a good connection with each other. |
Display plug loose or damp, Wiring harness damaged, Pedal sensor or the interconnecting cable of the pedal sensor, Display defective, Controller defective | Disconnect the display plug from the handlebars and connect it firmly again. Check the wiring harness at the handlebars and the frame for kinks, moisture or damage. Check the pedal sensor plug and the interconnecting cable at the pedal crank. Does the code persist? Then the display, the wiring harness or the controller is defective. |
| E08 |
Throttle lever The throttle lever (pedal assist) gives a wrong signal, or was pressed when turning on. |
Throttle lever pressed when turning on, Throttle lever plug loose, Throttle lever defective | Turn off the bike, do not touch the throttle lever and turn it on again. Check the throttle lever plug at the handlebars. Does the code persist? Then the throttle lever probably needs to be replaced. |
| E09 |
Controller The controller, the electronic brain of the bike, reports an error. |
Controller overheated after a heavy ride, Loose plug on the controller, Controller defective | Reset the bike: remove the battery, wait 1 minute, put the battery back. Let the bike cool down if you have just had a heavy ride. Check the large plugs of the controller. Does the code persist? Then the controller is probably defective. |
| E10 |
Communication Display and controller do not have a good connection with each other. |
Display plug loose or damp, Wiring harness damaged, Pedal sensor or the interconnecting cable of the pedal sensor, Display defective, Controller defective | Disconnect the display connector from the handlebar and reconnect it securely. Check the wiring harness near the handlebar and frame for kinks, moisture, or damage. Check the pedal sensor connector and the intermediate cable at the pedal crank. Does the code persist? Then the display, wiring harness, or controller is defective. |
| E11 |
Communication The display and controller do not have a proper connection with each other. |
Display connector loose or damp, Wiring harness damaged, Pedal sensor or pedal sensor intermediate cable, Display defective, Controller defective | Disconnect the display connector from the handlebar and reconnect it securely. Check the wiring harness near the handlebar and frame for kinks, moisture, or damage. Check the pedal sensor connector and the intermediate cable at the pedal crank. Does the code persist? Then the display, wiring harness, or controller is defective. |
Qmwheel H6C error codes Qmwheel V20, V20 Pro, V20 Mini, S20 Pro
| Code | Meaning | Possible causes | What can you do |
|---|---|---|---|
| E04 |
Communication: controller, wiring harness, display, pedal sensor or intermediate cable The display and controller do not have a proper connection with each other. |
Display connector loose or damp, Wiring harness damaged, Pedal sensor or pedal sensor intermediate cable, Display defective, Controller defective | Disconnect the display connector from the handlebar and reconnect it securely. Check the wiring harness near the handlebar and frame for kinks, moisture, or damage. Check the pedal sensor connector and the intermediate cable at the pedal crank. Does the code persist? Then the display, wiring harness, or controller is defective. |
| E08 |
Undervoltage The controller is receiving too little voltage from the battery. |
Battery empty, Battery-to-controller intermediate cable loose or broken, Battery contacts dirty or damaged, Battery defective (does not hold a charge) | Charge the battery fully. Remove the battery and check the contacts for dirt, moisture, or damage. Check the battery-to-controller intermediate cable and connector. Does a fully charged battery still display this code? Then the battery or intermediate cable is probably defective. |
| E10 |
Controller (possibly overheated) The controller, the electronic brain of the bike, reports an error. |
Controller overheated after a strenuous ride, Loose connector on the controller, Controller defective | Reset the bike: remove the battery, wait 1 minute, then reinsert it. Let the bike cool down if you have just completed a strenuous ride. Check the large connectors on the controller. Does the code persist? Then the controller is probably defective. |
| E20 |
Throttle The throttle (pedal assist) is sending an incorrect signal or was depressed when the bike was turned on. |
Throttle depressed when turning on, Throttle connector loose, Throttle defective | Turn off the bike, do not touch the throttle, and turn it on again. Check the throttle connector on the handlebar. Does the code persist? Then the throttle probably needs to be replaced. |
| E40 |
Motor Hall sensor The controller is not receiving a proper signal from the sensors in the motor. The bike jerks or no longer provides assistance. |
Motor connector at the rear axle damp or damaged, Motor cable damaged, Hall sensor in the motor defective | Check the motor connector at the rear axle for moisture, rust, or bent pins. Check if the motor cable is damaged anywhere. Does the code persist? Have the motor tested in the workshop. |
| E60 |
Throttle and motor Malfunction in the throttle or the motor. |
Throttle or connector defective, Motor connector or motor cable damaged, Motor defective | Turn off the bike, do not touch the throttle, and turn it on again. Check the throttle connector and the motor connector at the rear axle. Does the code persist? Have the throttle and motor tested. |
| E80 |
Communication (same as E04) The display and controller do not have a proper connection with each other. |
Display connector loose or damp, Wiring harness damaged, Pedal sensor or pedal sensor intermediate cable, Display defective, Controller defective | Disconnect the display connector from the handlebar and reconnect it securely. Check the wiring harness near the handlebar and frame for kinks, moisture, or damage. Check the pedal sensor connector and the intermediate cable at the pedal crank. Does the code persist? Then the display, wiring harness, or controller is defective. |
7GO and RSE error codes RSE, RSE Plus, RSE Fluence, 7GO EB2, EB3, EB8
Codes according to the display manufacturer's manual (Yolin YL-02).
| Code | Meaning | Possible causes | What can you do |
|---|---|---|---|
| E001 |
Controller The controller, the electronic brain of the bike, reports an error. |
Controller overheated after a strenuous ride, Loose connector on the controller, Controller defective | Reset the bike: remove the battery, wait 1 minute, then reinsert it. Let the bike cool down if you have just completed a strenuous ride. Check the large connectors on the controller. Does the code persist? Then the controller is probably defective. |
| E002 |
Display and controller communication The display and controller do not have a proper connection with each other. |
Display connector loose or damp, Wiring harness damaged, Pedal sensor or pedal sensor intermediate cable, Display defective, Controller defective | Disconnect the display connector from the handlebar and reconnect it securely. Check the wiring harness near the handlebar and frame for kinks, moisture, or damage. Check the pedal sensor connector and the intermediate cable at the pedal crank. Does the code persist? Then the display, wiring harness, or controller is defective. |
| E003 |
Motor Hall sensor The controller is not receiving a proper signal from the sensors in the motor. The bike jerks or no longer provides assistance. |
Motor connector at the rear axle damp or damaged, Motor cable damaged, Hall sensor in the motor defective | Check the motor connector at the rear axle for moisture, rust, or bent pins. Check if the motor cable is damaged anywhere. Does the code persist? Have the motor tested in the workshop. |
| E004 |
Throttle The throttle (pedal assist) is sending an incorrect signal or was depressed when the bike was turned on. |
Throttle depressed when turning on, Throttle connector loose, Throttle defective | Turn off the bike, do not touch the throttle, and turn it on again. Check the throttle connector on the handlebar. Does the code persist? Then the throttle probably needs to be replaced. |
| E005 |
Brake or brake sensor The controller detects that the brakes are applied and turns off the motor for your safety. |
Brake lever stuck, Brake sensor (brake switch) defective or misaligned, Brake sensor connector loose | Turn off the bike, release both brake levers completely, and turn it on again. Check if a brake lever is stuck or does not spring back completely. Check the brake sensor connectors on the handlebar. |
| E006 |
Motor phase The motor is reporting a malfunction, or the controller cannot connect to the motor. |
Motor connector loose or damp, Motor cable damaged, Motor defective, Controller defective | Check the motor connector for moisture or loose pins. Check the motor cable at the rear axle for damage. Do not continue riding with assistance and have the motor tested. |
| E06 |
Battery almost empty (short display) The controller is receiving too little voltage from the battery. |
Battery empty, Battery-to-controller intermediate cable loose or broken, Battery contacts dirty or damaged, Battery defective (does not hold a charge) | Charge the battery fully. Remove the battery and check the contacts for dirt, moisture, or damage. Check the battery-to-controller intermediate cable and connector. Does a fully charged battery still display this code? Then the battery or intermediate cable is probably defective. |
Windgoo F-series error codes Windgoo F1, F5, F21 Pro, F22 Pro
| Code | Meaning | Possible causes | What can you do |
|---|---|---|---|
| E1 |
Motor Hall sensor The controller is not receiving a proper signal from the sensors in the motor. The bike jerks or no longer provides assistance. |
Motor connector at the rear axle damp or damaged, Motor cable damaged, Hall sensor in the motor defective | Check the motor connector at the rear axle for moisture, rust, or bent pins. Check if the motor cable is damaged anywhere. Does the code persist? Have the motor tested in the workshop. |
| E2 |
Motor phase The motor is reporting a malfunction, or the controller cannot connect to the motor. |
Motor connector loose or damp, Motor cable damaged, Motor defective, Controller defective | Check the motor connector for moisture or loose pins. Check the motor cable at the rear axle for damage. Do not continue riding with assistance and have the motor tested. |
| E3 |
Controller The controller, the electronic brain of the bike, reports an error. |
Controller overheated after a strenuous ride, Loose connector on the controller, Controller defective | Reset the bike: remove the battery, wait 1 minute, then reinsert it. Let the bike cool down if you have just completed a strenuous ride. Check the large connectors on the controller. Does the code persist? Then the controller is probably defective. |
| E4 |
Undervoltage The controller is receiving too little voltage from the battery. |
Battery empty, Battery-to-controller intermediate cable loose or broken, Battery contacts dirty or damaged, Battery defective (does not hold a charge) | Charge the battery fully. Remove the battery and check the contacts for dirt, moisture, or damage. Check the battery-to-controller intermediate cable and connector. Does a fully charged battery still display this code? Then the battery or intermediate cable is probably defective. |
| E5 |
Throttle The throttle (pedal assist) is sending an incorrect signal or was depressed when the bike was turned on. |
Throttle depressed when turning on, Throttle connector loose, Throttle defective | Turn off the bike, do not touch the throttle, and turn it on again. Check the throttle connector on the handlebar. Does the code persist? Then the throttle probably needs to be replaced. |
| E6 |
Communication The display and controller do not have a proper connection with each other. |
Display connector loose or damp, Wiring harness damaged, Pedal sensor or pedal sensor intermediate cable, Display defective, Controller defective | Disconnect the display connector from the handlebar and reconnect it securely. Check the wiring harness near the handlebar and frame for kinks, moisture, or damage. Check the pedal sensor connector and the intermediate cable at the pedal crank. Does the code persist? Then the display, wiring harness, or controller is defective. |
| E8 |
Display communication The display and controller do not have a proper connection with each other. |
Display connector loose or damp, Wiring harness damaged, Pedal sensor or pedal sensor intermediate cable, Display defective, Controller defective | Disconnect the display connector from the handlebar and reconnect it securely. Check the wiring harness near the handlebar and frame for kinks, moisture, or damage. Check the pedal sensor connector and the intermediate cable at the pedal crank. Does the code persist? Then the display, wiring harness, or controller is defective. |
Windgoo F20 error codes Windgoo F20
| Code | Meaning | Possible causes | What can you do |
|---|---|---|---|
| E0 |
Power supply The system is not receiving a stable power supply. |
Battery empty, Battery-to-controller intermediate cable loose or broken, Battery contacts dirty or damaged, Battery defective (does not hold a charge) | Charge the battery fully. Check the battery contacts and the intermediate cable to the controller. Does the code persist? Have the battery and controller tested. |
| E1 |
Pedal force sensor The pedal sensor is not sending a proper signal, so pedal assistance does not work. |
Pedal sensor connector loose, Pedal sensor intermediate cable damaged, Pedal sensor defective or misaligned | Check the pedal sensor connector and intermediate cable at the pedal crank. Check if the magnetic ring at the pedal crank is securely attached. Does the code persist? Replace the pedal sensor. |
| E2 |
Communication The display and controller do not have a proper connection with each other. |
Display connector loose or damp, Wiring harness damaged, Pedal sensor or pedal sensor intermediate cable, Display defective, Controller defective | Disconnect the display connector from the handlebar and reconnect it securely. Check the wiring harness near the handlebar and frame for kinks, moisture, or damage. Check the pedal sensor connector and the intermediate cable at the pedal crank. Does the code persist? Then the display, wiring harness, or controller is defective. |
| E3 |
Undervoltage The controller is receiving too little voltage from the battery. |
Battery empty, Battery-to-controller intermediate cable loose or broken, Battery contacts dirty or damaged, Battery defective (does not hold a charge) | Charge the battery fully. Remove the battery and check the contacts for dirt, moisture, or damage. Check the battery-to-controller intermediate cable and connector. Does a fully charged battery still display this code? Then the battery or intermediate cable is probably defective. |
| E4 |
Controller overheated A component has become too hot and is protecting itself. |
Long climb or heavy load, Hot weather, Defective component if it happens again quickly | Turn off the bike and let it cool down for 15 to 30 minutes. Then ride in a lower assistance mode. Does it happen again often? Have the bike checked. |
| E5 |
Motor Hall sensor The controller is not receiving a proper signal from the sensors in the motor. The bike jerks or no longer provides assistance. |
Motor connector at the rear axle damp or damaged, Motor cable damaged, Hall sensor in the motor defective | Check the motor connector at the rear axle for moisture, rust, or bent pins. Check if the motor cable is damaged anywhere. Does the code persist? Have the motor tested in the workshop. |
| E6 |
Motor blocked The motor does not turn while receiving power. |
Something is jammed at the rear wheel, Motor or motor cable defective | Turn off the bike and check if the rear wheel turns freely. Check the motor cable and connector. Have the motor tested if the code persists. |
| E7 |
Controller overcurrent The controller is drawing too much current due to a strenuous climb, short circuit, or motor malfunction. |
Heavy load or climb, Short circuit in the motor or wiring, Controller defective | Turn off the bike and let it cool down for 10 to 15 minutes. Then ride away gently in a low mode. Does the code return? Have the workshop test the motor and controller. |
| E8 |
Motor overheated A component has become too hot and is protecting itself. |
Long climb or heavy load, Hot weather, Defective component if it happens again quickly | Turn off the bike and let it cool down for 15 to 30 minutes. Then ride in a lower assistance mode. Does it happen again often? Have the bike checked. |
| E9 |
Voltage too high The battery voltage is too high for the controller. |
Wrong charger used, Battery or BMS defective, Controller defective | Use only the original charger. Let the battery rest after charging and turn the bike on again. Does the code persist? Have the battery and charger tested. |