On this page
- Error Codes at a Glance
- What Should You Do When a Bosch eBike Error Code Appears?
- Error Code 503: Speed Sensor Fault
- Error Code 504: Speed Signal Distortion
- Error Codes 500, 511 and Other Drive Unit Faults
- Error Codes 530, 602, 603, 605, 610 and 640: Battery Problems
- Error Code 540: Motor Temperature Error
- Error Code 610: Battery Voltage Error
- Error Code 620: Charger Fault
- ABS Error Codes
- Can You Ride a Bosch eBike With an Error Code?
- When Should You Contact a Bosch eBike Dealer?
- FAQ
When a Bosch-powered electric bike detects a problem, the system may display an error code on the onboard computer or display. Depending on the fault, motor assistance may be reduced or shut down completely.
These codes do not necessarily mean that the Bosch motor itself has failed. A code can originate from the drive unit, battery, speed sensor, display, wiring, controller, charger, software, or ABS system.
Bosch maintains an official error-code database where individual codes can be searched for their meaning and recommended solution.
Below is a Bosch electric bike error code list based on Bosch documentation, including the codes shown in the reference manual.
Error Codes at a Glance
| Error Code | Meaning / Cause | What to Do |
|---|---|---|
| 410 | One or more onboard-computer buttons are disabled | Check for stuck or dirty buttons and clean them if necessary. |
| 414 | Operating unit connection problem | Check the operating-unit connections and wiring. Bosch recommends having the connections checked. |
| 418 | One or more operating-unit buttons are disabled | Look for stuck buttons or dirt around them and clean as necessary. |
| 419 | Configuration error | Restart the Bosch eBike system. If the error returns, contact a Bosch eBike dealer. |
| 422 | Drive unit connection problem | Inspect the connections between the drive unit and the rest of the system. |
| 423 | eBike battery connection problem | Check the battery connection and electrical contacts. |
| 424 | Communication problem between components | Check system connections and wiring. |
| 426 | Internal time-out error | Restart the system. If the error remains, professional diagnosis may be required. |
| 430 | Onboard-computer internal battery is flat | Charge the onboard computer in its holder or through its supported USB charging connection. |
| 431 | Software version error | Restart the system. If unsuccessful, have the software checked by a Bosch dealer. |
| 440 | Internal drive unit fault | Restart the system. If the error returns, have the drive unit diagnosed. |
| 450 | Internal software error | Restart the Bosch system. Persistent errors require dealer diagnosis. |
| 460 | USB port error | Disconnect the cable/device from the USB port and restart. |
| 490 | Internal onboard-computer fault | Have the onboard computer checked. |
| 500 | Internal drive unit fault | Restart the system. If the problem continues, contact a Bosch eBike dealer. |
| 502 | Bike light fault | Check the lights and associated wiring, then restart the system. |
| 503 | Speed sensor fault | Restart the system and inspect the speed sensor/magnet system if the error returns. |
| 504 | Speed signal distortion detected | Check the spoke magnet position and make sure the speed-sensing system has not been modified or tampered with. |
| 510 | Internal sensor fault | Restart the system. Persistent faults require professional diagnosis. |
| 511 | Internal drive unit fault | Restart the eBike. Contact a Bosch dealer if the error returns. |
| 530 | Battery fault | Turn the eBike off, remove and reinstall the battery, and restart the system. |
| 531 | Configuration error | Restart the system. If the code remains, contact a Bosch dealer. |
| 540 | Temperature error | Switch off the eBike and allow the drive unit to cool down or warm up into its permissible operating range before restarting. |
| 550 | Impermissible load detected | Remove the load or problematic connected component and restart the system. |
| 580 | Software version error | Restart the system. A dealer may need to check or update the software. |
| 591 | Authentication error | Turn off the system, remove and reinstall the battery, then restart. |
| 592 | Incompatible component | Use a compatible Bosch display/component. |
| 593 | Configuration error | Restart the system. Contact a Bosch dealer if it persists. |
| 595 / 596 | Communication error | Check wiring to the drive unit and restart the system. |
| 602 | Internal battery fault | Restart the system. Persistent faults require battery diagnosis. |
| 603 | Internal battery fault | Restart the system. If the problem persists, contact a Bosch eBike dealer. |
| 605 | Battery temperature error | Let the battery cool down or warm up to its permissible operating range before restarting. |
| 606 | External battery fault | Check battery wiring/connections and restart. |
| 610 | Battery voltage error | Restart the system. If it returns, have the battery/system checked. |
| 620 | Charger fault | Stop using the suspect charger and have it checked or replaced with the correct Bosch charger. |
| 640 | Internal battery fault | Restart the system. Persistent faults require professional service. |
| 655 | Multiple battery faults | Switch off the system, remove and reinstall the battery, then restart. |
| 656 | Software version error | A Bosch eBike dealer may need to perform a software update. |
| 7xx | Error related to a third-party component | Refer to the instructions supplied by the manufacturer of that component. |
| 800 | Internal ABS fault | Have the ABS system checked by a Bosch eBike dealer. |
| 810 | Implausible wheel-speed sensor signals | Dealer inspection is recommended. |
| 820 | Fault in wiring to front wheel-speed sensor | Have the sensor and wiring checked. |
| 821–826 | Implausible front wheel-speed sensor signals | Restart and perform a short test ride. Check the sensor disc and wheel setup if the warning remains. |
| 830 | Fault in wiring to rear wheel-speed sensor | Have the rear speed sensor and wiring checked. |
| 831 / 833–835 | Implausible rear wheel-speed sensor signals | Restart and test ride; inspect the rear sensor/disc and wheel setup if the error persists. |
| 840 | Internal ABS fault | Contact a Bosch eBike dealer. |
| 850 | Internal ABS fault | Contact a Bosch eBike dealer. |
| 860 / 861 | Power-supply fault | Restart the system. If the fault remains, professional diagnosis is recommended. |
| 870 / 871 / 880 / 883–885 | Communication error | Restart the system. Persistent communication errors should be diagnosed by a Bosch dealer. |
| 889 | Internal ABS fault | Contact a Bosch eBike dealer. |
| 890 | ABS indicator light defective or missing; ABS may not work | Have the system checked by a Bosch eBike dealer. |
| No display | Internal onboard-computer fault | Switch the eBike off and back on. If the display remains blank, inspect the battery/display connections and seek service if necessary. |
What Should You Do When a Bosch eBike Error Code Appears?
For many temporary Bosch eBike errors, the first troubleshooting step is simply to restart the system.
Turn the eBike completely off, wait several seconds, and switch it back on. If the error disappears and does not return, it may have been a temporary communication or sensor issue.
If the error remains, try the following basic checks:
- Check the battery. Make sure it is charged, correctly seated, and securely locked into position.
- Inspect visible connections. Look for loose plugs, damaged wiring, contamination, or moisture around accessible connectors.
- Check the speed sensor and magnet. If you have a 503, 504, or related speed-sensor error, inspect the sensor and magnet alignment.
- Check the controls and display. Codes such as 410 and 418 can result from stuck or contaminated buttons.
- Consider temperature. Codes such as 540 and 605 can appear when the drive unit or battery is outside its permitted temperature range.
- Restart after correcting the obvious issue. If the same code immediately returns, further diagnosis is usually needed.
Do not open the Bosch drive unit or battery pack to troubleshoot an internal error. Bosch systems contain high-current electrical components, and many internal faults require diagnostic equipment.
Error Code 503: Speed Sensor Fault
Error 503 is one of the more recognizable Bosch eBike errors because it concerns the speed-sensing system.
The motor controller needs accurate wheel-speed information to determine how assistance should be delivered. If that signal is missing or implausible, the system may reduce or disable assistance.
Start by inspecting the speed sensor and its corresponding magnet. Make sure nothing is obviously loose, damaged, or displaced. Restart the system afterward.
If code 503 repeatedly returns despite the sensor system appearing normal, dealer diagnostics are appropriate.
Error Code 504: Speed Signal Distortion
Error 504 is related to a distorted or implausible speed signal.
Check that the spoke magnet is correctly positioned relative to the sensor. The reference documentation also specifically warns that the system should be checked for tampering or tuning.
This distinction matters: 503 generally indicates a speed-sensor fault, while 504 indicates that the detected speed signal itself is abnormal.
Error Codes 500, 511 and Other Drive Unit Faults
Codes such as 440, 500, and 511 indicate internal drive-unit faults.
Do not immediately assume that the entire Bosch motor must be replaced. Start by restarting the system. Bosch's guidance for code 500, for example, is to restart and contact a Bosch eBike dealer if the problem persists.
If an internal drive-unit error repeatedly returns, however, there is generally little meaningful DIY troubleshooting to perform inside the motor.
A Bosch dealer can connect diagnostic equipment, retrieve stored errors, inspect the system, and determine whether the issue involves software, sensors, wiring, or the drive unit itself.
Error Codes 530, 602, 603, 605, 610 and 640: Battery Problems
A large group of Bosch codes relates to the battery.
530 indicates a battery fault, while 602, 603 and 640 indicate internal battery faults. Code 605 relates specifically to battery temperature, and 610 indicates a battery-voltage error.
For a 530 error, switch the system off and remove the battery. Inspect the accessible contacts for obvious dirt or damage, reinstall the battery securely, and restart the bike.
For a temperature-related 605 error, allow the battery to return to a suitable operating temperature before trying again.
Repeated internal battery or voltage errors should not be treated as DIY battery-repair projects. Lithium-ion battery packs should not be opened or repaired without the appropriate training and equipment.
Error Code 540: Motor Temperature Error
Code 540 means the eBike is outside the permitted temperature range.
Bosch recommends switching off the system and allowing the drive unit to either cool down or warm up until it is back within its permissible temperature range, then restarting it.
This can occur after demanding riding conditions or exposure to unusually high or low temperatures.
If the motor is repeatedly generating code 540 during otherwise normal riding conditions, have the system inspected.
Error Code 610: Battery Voltage Error
Error 610 means that the system has detected a battery-voltage problem. Bosch's recommended first step is a system restart; if the fault continues, dealer service is recommended.
Because voltage abnormalities can originate inside the battery or its management electronics, avoid opening the battery to attempt a repair.
Error Code 620: Charger Fault
Code 620 indicates a charger fault.
If this code appears, stop using a charger that appears damaged or defective. Make sure you are using the appropriate charger for your Bosch eBike system.
A persistent charger fault generally calls for charger replacement or professional inspection rather than opening or repairing the charger yourself.
ABS Error Codes
Bosch-equipped bikes with ABS can display additional error codes in the 800 series.
Codes including 800, 840, 850 and 889 indicate internal ABS faults, while codes in the 810–835 range are commonly associated with wheel-speed sensors, their wiring, or implausible sensor signals.
Code 890 specifically indicates that the ABS indicator light is defective or missing and that ABS may therefore not be working. Bosch advises contacting a dealer.
Because ABS directly affects braking behavior, persistent ABS warnings should receive more attention than a minor display or button fault.
Can You Ride a Bosch eBike With an Error Code?
It depends on the code.
Some faults merely affect a peripheral feature, while others can cause the drive assistance to shut down. The bicycle itself may still be mechanically rideable without motor assistance, but you should not assume every error is safe to ignore.
In particular, take battery, overheating, drive-unit, wheel-speed, power-supply and ABS errors seriously.
If an error repeatedly returns after a restart, arrange for the eBike to be checked before relying on it for another ride.
When Should You Contact a Bosch eBike Dealer?
You should seek professional service when an error:
- returns immediately after restarting;
- involves an internal motor or battery fault;
- affects ABS or braking-related sensors;
- appears with damaged wiring or connectors;
- is accompanied by unusual motor noises, overheating, smoke, odor, or abnormal battery behavior;
- requires a software update or diagnostic-tool access.
Bosch's current support system allows riders to search individual error codes and see their description and possible solution steps.
For the latest code-specific guidance, use the Bosch eBike Systems Help Center.
FAQ
What does a Bosch eBike error code mean?
An error code identifies a malfunction detected somewhere in the Bosch eBike system. The problem may involve the motor, battery, display, sensors, wiring, charger, software, ABS, or another connected component.
How do I clear a Bosch eBike error code?
Start by switching the system off and restarting it. If the code has an obvious external cause—such as a stuck button, improperly seated battery, temperature issue, or sensor problem—correct that issue before restarting.
A persistent code usually cannot be permanently “cleared” simply by pressing buttons; its underlying cause must be corrected.
Does a Bosch error code mean my motor is broken?
No. Many codes have nothing to do with an actual motor failure. For example, 418 concerns operating-unit buttons, 540 concerns temperature, 610 concerns battery voltage, and 890 concerns the ABS indicator system.
What is the most important thing to remember?
Treat the error code as a diagnostic clue rather than a diagnosis by itself. Restart the system, check safe and accessible components related to the code, and avoid opening the motor or lithium-ion battery. If the code repeatedly returns, a Bosch-certified eBike dealer can perform a more complete diagnostic check.
