Some faults will clear with a simple reset. Anything that shuts the bike off or limits power really should be seen by an expert before using it again.
Blix Bikes Error Codes: How To Fix Them
Written by: Robbie Ferri | January 31, 2026 | Time to read 6 min
Error codes can look intimidating, but most Blix e-Bike warnings are simple to diagnose and often easy to fix. In this article, we break down every Blix error code in plain English.
More about the Author: Robbie Ferri
Robbie is a UK-based ultra cyclist, former bike shop worker, and qualified bike fitter. Deeply passionate about e-Bikes and adventure cycling, he combines hands-on experience with real-world riding to help others go further on two wheels.
Owning an electric bike isn’t always like a typical bike. There’s your standard maintenance, cleaning, and odd little tune-ups, but you’re also dealing with software and electronics. Although this might sound scary, there are just a few other considerations you need to make.
Electric bikes are generally very reliable, but can display error codes to warn the user of potential issues. In this article, we’re going to be discussing Blix Bike’s error codes, what they mean, and how you can fix them.
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Table of Contents
What Are Blix Electric Bikes?
Blix Bikes was founded in 2014 by Pontus Malmberg. It all started in Santa Cruz, California, and the bikes were made for leisure riding and everyday transportation. Simple bikes designed to improve people's transport and let them explore freely.
The bikes they make are mostly cargo, folding, city, and cruiser bikes. Not anything extreme like mountain or road e-Bikes. They operate direct-to-consumer but do have local showrooms for testing, if required. They use either a 500W or 750W rear hub motor and a battery from an OEM supplier.
Unlike many other brands, they don't use a mid-drive motor. They use a direct-drive hub motor on the rear wheel. It's simple and effective. Blix also operates a typical drive-train system using a shifter cable rather than geared hub motors. Another brand similar to Blix is Rad Power Bikes. Here you can learn more about electric bike brands.
Why Might You Get An Error Code On Your Bike?
Error codes are not always a bad thing. They often signal that an issue is developing, and the bike is entering protection mode to prevent long-term damage. A good example is when the bike might warn you that the 014 - motor temperature is too high.
This means the rear hub motor is getting too warm, and the simple fix could be clearing the motor's ventilation of leaves or mud, or backing off on the assistance at a low cadence to avoid stressing the motor.
How Do We Know What The Code Means?
As with many brands, they don’t typically spell out the problem because it might not fit on the bike's display or be too vague. This is where error codes come into play. Understanding them typically requires a bit of research, which would have brought you here.
How Do We Avoid Error Codes?
The easiest way to avoid error codes is to keep the bike clean, service it regularly, and store it in a good environment. Another major cause of error codes is using a charger that is not the manufacturer's.
Complete List of Blix E-Bike Error Codes
Error Code 1 - Display communication fault
A display communication fault caused by the controller not communicating properly with the LCD display screen.
Fully reset the bike (Power Cycle), check the display and controller cables, and clean the connections. This should fix it. If not, it might be worth looking for a new display.
Error Code 2 - Display Storage Fault
The Display Storage Fault is commonly caused by a voltage spike that affects the bike's firmware or internal memory.
Fully reset the bike (Power Cycle), remove and leave the battery out for a few minutes before reseating. Then turn it back on. It should work. Failing that, color display unit replacement.
Error Code 3 - Display Mode M
A display mode m button malfunction is when the menu button is not working or is developing a fault.
Check the button for water ingress or damage. Often it’s the electronics under the button. Clean around the button gently. If not resolved, replace the whole display unit.
Error Code 101 - Overvoltage
An overvoltage has been sensed in the system. Often caused by a charger or battery error.
Stop charging or riding the bike. Inspect both the battery and charger for damage. Turn the bike off and let the voltage stabilize before riding again. If the error repeats, see a Blix expert.
Error Code 102 - Undervoltage
Battery undervoltage. The opposite of an overvoltage. Generally, it comes from a poorly performing battery.
Fully charge the battery with the original charger. If the error occurs again, the cells might be damaged, and you might need to replace the battery.
Error Code 103 - Phase current error
The phase current error is caused by a poor connection between the controller and the rear motor.
Check the connections and cables between the controller box and the hub motor. If there’s damage, water ingress, damaged pins, or even loose cables, replace them, and the issue should be fixed.
Error Code 105 - Motor not phasing
The motor is not phasing properly. Typically, there is a poor connection between the motor cable alignment and connectors.
Check the cables and connections between the motor and controller box on the bike. Update the firmware on the controller. Failing that, it could be a controller replacement or an expert repair.
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Error Code 106 - Motor short-circuiting
Motor short-circuiting is typically caused by water ingress, poor or damaged wiring, or faulty connections.
Stop using the bike straight away. Check the motor, controller, and wiring for damage. If the problem persists, see an expert Blix technician.
Error Code 107 - Motor locked error
The motor locked error occurs when the hub motor cannot rotate freely. Common causes include the motor being obstructed, seized bearings, or just too much load at that current time through the phase wires.
Allow the motor to cool down and restart the bike. Power up, check that the wheel spins freely. If the issue persists, the motor may need servicing or replacing.
Error Code 108 - Motor Hall Sensor
The motor hall sensor anomaly error code. This is when the motor is sending incorrect signals for the controller to understand.
Firstly, inspect the motor cable. Then, the connections for any missing pins. If all of these are fine, it's more than likely a fault with the hall sensor inside the motor. This will require a new rear hub motor or a Blix expert to replace the sensors.
Error Code 109 - Controller Overheating
A controller overheating error occurs when sustained high power output results from driving the motor too hard, causing the controller to overheat.
Stop riding and let the controller cool down. This is common on long climbs, where low cadence is used. Use a higher cadence and lower the assistance when riding for long periods. Ensure the brake levers are not pressed in when starting for the hall-effect sensor to operate properly.
Error Code 110 - Throttle Anomaly
Throttle anomaly is caused by irregular signals from the throttle, often due to damage or moisture.
Ensure the twist throttle is not stuck. Inspect wiring and throttle for damage. Replace the throttle sensors if the issue continues. You might have a thumb throttle with control buttons. The same process applies.
Error Code 111 - Communication Or Connection Fault
Communication or connection fault between the battery, display, and controller. Often caused by damage or poor connections.
Fully reset the bike (Power cycle), and inspect all main cables. Reseat connectors firmly and ensure there is no moisture or corrosion.
Error Code 113 - The Torque Sensor Has Unknown Readings
The torque sensor has unknown readings, likely due to incorrect or missing readings from the torque sensor.
Check the sensor on the bottom bracket area for damage. Restart the bike. If the error persists, the torque sensor may need recalibration by restarting the bike, or it may need to be replaced altogether by a bike shop.
Error Code 115 - Controller Temperature
The controller temperature sensor fault is caused by a failed or inaccurate internal sensor.
Power cycle the bike. If the error persists, the controller will usually need to be replaced or professionally repaired.
Error Code 116 - Motor Sensor Fault
Motor sensor fault. Often caused by high motor temperature readings or poor speed data.
Inspect motor wiring and connectors. If nothing is found, the hub motor may need ventilation clearing or servicing. Ensure the brake levers are not pressed in when starting.
Error Code 201 - The Display Cannot Receive Data From The Controller
The display cannot receive data from the controller due to a failed or loose communication cable.
Check the display-to-controller cable and reseat all connectors. Replace the cable or controller if the issue persists.
Error Code 301 - EShift Low Voltage
EShift low voltage caused by insufficient power being supplied to the electronic shifting system.
Fully charge the battery and inspect the eShift wiring. If the issue persists, seek an expert to determine whether a new battery may be required.
Error Code 302 - EShift Blockage
EShift blockage caused by physical obstruction or drivetrain misalignment. Typically caused by something stuck in the drivetrain or damage.
Inspect the derailleur, chain, and cassette. Remove debris and repair any damage before continuing. Often a bent hanger.
Error Code 303 - eShift Encoding Issue
The eShift encoding issue was caused by incorrect position data from the electronic shifting system.
Restart the bike and allow the system to recalibrate. If the issue continues, a firmware update will need to be performed or the eShift system replaced.
Error Code 401 - Rear Battery Short Circuits
A rear battery short circuit. Often caused by damaged terminals or a battery with poor health.
Remove the battery immediately and stop using it. Battery replacement is strongly recommended.
Error Code 402 - Rear Battery Discharge Overcurrent
Rear battery discharge overcurrent. Normally caused by internal battery resistance or an excessive load.
Reduce assist levels and restart the bike. If the error recurs, the battery may need to be replaced due to dead or old cells.
Error Code 403 - Rear Battery Undervoltage
Rear battery undervoltage is often caused by aged cells, a deep discharge, or surprisingly cold temperatures.
Fully recharge the battery and warm it if it's cold. These errors can often be an early warning of a new battery being required.
Error Code 404 - Bike Temperature Is Too High
The bike temperature is too high, likely due to overheating of either the battery, motor, or controller.
Stop. Let the system cool down, then, when leaving again, it’s advised to ease off the assistance for a while.
Error Code 405 - Bike's Temperature Is Too Low
The bike's temperature is too low, indicating the battery is outside its safe operating range.
Warm the battery indoors before riding and avoid charging when it's this cold.
Error Code 406 - Overcurrent Charging
Overcurrent charging caused by using an incorrect non-OEM charger or a damaged charging port.
Stop charging immediately. Use only the approved charger and inspect the charging port for any damage.
Error Code 407 - Overcharge Fault
Overcharge fault detected by the battery management system during charging.
Disconnect the charger and stop using the battery. Check the charger for damage. Then we recommend getting the battery replaced or checked by an expert.
Error Code 408 - Overcharge Temperature Fault
Overcharge temperature fault. This is mostly caused when charging the battery when it’s too warm.
Allow the battery to cool fully before charging. Then assess the charging environment and move it to a cooler place.
Error Code 409 - Undercharge Temperature Fault
Undercharge temperature fault during charging in very cold conditions.
Move the battery to a warmer environment and let it warm up before charging again.
Error Code 501 - Secondary Battery Short Circuit
Secondary battery short circuit caused by internal battery failure.
Remove the secondary battery immediately and stop using it. Replacement is usually required unless it’s just a glitch. Getting the secondary battery checked is a good idea.
Error Code 502 - Secondary Battery Discharge Overcurrent
The secondary battery discharge overcurrent is caused by excessive load or battery degradation.
Restart the system, and reduce the assistance levels for a while. Replace the battery if the error repeats.
Error Code 503 - Secondary Battery Undervoltage
Secondary battery undervoltage is caused by deep discharge, aging, or old cells.
Fully recharge the battery. Persistent errors suggest a replacement battery will be required sooner rather than later.
Error Code 504 - Secondary Battery Overheating
Secondary battery overheating caused by heavy use or a very warm environment.
Allow the battery to cool, then start riding again, not going crazy on the assistance.
Error Code 505 - Secondary Battery Too Cold To Operate Safely
Secondary battery too cold to operate safely.
Warm the battery before use. Take it inside and let it warm up naturally. Try not to rush the process by putting it on a warm object.
Error Code 506 - Secondary Battery Charging Overcurrent
Secondary battery charging overcurrent. Often caused by damage in the charging port, or you're using a charger that is not within the manufacturer's specifications.
Stop charging and use only the correct charger provided the charging port is all ok.
Error Code 507 - Secondary Battery Overcharge
Secondary battery overcharge fault detected by the battery management system (BMS).
Disconnect the charger immediately. Battery replacement is recommended, or see an expert for a diagnosis.
Error Code 508 - Secondary Battery Overcharge Temperature
Secondary battery overcharge temperature fault caused by charging while the battery was too hot.
Allow the battery to cool before charging again. Consider the charging environment where you charge the battery to somewhere cooler.
Error Code 509 - Secondary Battery Undercharge Temperature
Secondary battery undercharge temperature fault caused by charging in cold conditions.
Charge the battery in a warmer environment for charging. Indoors is generally the best place for a battery.
When Is It Time To Visit A Blix Bikes Dealer Or Mechanic?
If the bike is still under warranty, we highly recommend taking it to a Blix dealer or a certified mechanic. If it isn’t, and you are trying to establish where the line is between a home repair and expert repair, then this is our best advice.
Anything that involves risk or requires opening the casing of a motor, controller, or battery should be left to an expert. Sensors, cleaning, and general maintenance jobs are fairly straightforward.
Frequently Asked Questions
Can I still ride my Blix e-Bike with an error code?
What causes battery-related Blix error codes?
Battery errors are often caused by cold temperatures, aging or dead battery cells, using incorrect chargers, or internal battery faults. These are generally major issues compared to sensors.
How do I reset a Blix e-Bike?
Turn the bike off. Remove the battery and leave it for around five minutes. Reinstall the battery and start the bike again.
Key Takeaways
- Blix errors are often not random. They are diagnostics that feed data back to you, alerting you to potential issues that could cause further damage.
- A simple Blix bike reset will fix many errors. If they return, they need to be approached or investigated to ensure it will not be an ongoing problem.
- Many errors come from batteries. Batteries do not last forever and will need to be replaced over a bike's life.
