Drive Unit Fix

Bosch BES2 Error codes - We can solve almost all of these

100 Internal error in the drive unit. Print error report, clear error code, restart system, and perform a test ride
101 Communication problem between the drive unit and other system components
102 Speed sensor problem
103 Problem with the power supply to the front and rear lights (only when bike lighting is connected to the drive unit)
104 Problem with the onboard computer power supply
105 Temperature in the drive unit exceeds the maximum limit

200 Battery error
201 Battery temperature above the maximum permitted value
202 Battery temperature below the permitted value
203 CAN communication problem between the battery and other system components
204 Battery management system detects false charging current. Only use the original charger

410 Display button error. Print error report, clear error code, and restart system
414 Control unit error. Print error report, clear error code, and restart system
418 Control unit button error
419 Software or hardware error
422 Display communication problem
423 Communication problem between the battery and other system components
424 Internal communication problem (Nyon, Intuvia, or Purion display)
426 Internal hardware problem (Nyon, Intuvia, or Purion display)
430 Internal battery of the display (Nyon, Intuvia, or Purion) discharged
431 Incorrect software version
440 Drive unit not compatible with Intuvia display
450 Error in the Intuvia display power supply
460 Voltage error / overload of the USB port on the display
490 Internal display error

500 Internal drive unit error
502 Voltage too high or too low when switching riding lights on/off
503 Speed sensor problem
510 Torque sensor problem / internal sensor error
511 Gear sensor problem

530 Battery not detected
531 Software for the wrong product line
531 Drive unit software incorrectly configured
531 Implausible configuration data or incorrect software version

540 Temperature error. Drive unit temperature below -10 °C or above 80 °C
550 Unknown power consumer or voltage source

580 Display or battery software version outdated
591 Shifting not possible (e.g. when using NuVinci/Enviolo)
592 Shifting not possible
593 No eShift function available
595 Shifting not possible

596 NuVinci/Enviolo – No gear or cadence display, cadence control does not work, and manual shifting is not possible
596 Shimano – No gear indication, shifting via Shimano control unit not possible
596 SRAM – No gear indication and automatic shifting not possible

602 Internal error in the battery charger or battery
603 Overvoltage during battery use (discharging)
606 Short circuit on the consumer side
610 Overvoltage or undervoltage at the battery

620 Charger error
620 If more than one charger is connected in a dual-battery system, remove the second charger

640 Unacceptable voltage fluctuations in the battery
655 Electronic fault in the battery
655 Internal battery error
656 Incorrect hardware or software version (battery)
657 Dual-battery communication error between both batteries

680 Battery ON/OFF button error

SMART SYSTEM BES3

Error code 0x410015 – Error on on-board computer key. Remedy: Check whether keys are blocked. If the error persists, replace the on-board computer.

Error code 0x414014 – Error on the control unit. Remedy: Check wiring. If the error persists, replace the control unit.

Error code 0x418016 – Error on the control unit. Remedy: Check whether keys are blocked. If the error persists, replace the control unit.

Error code 0x419001 – Incorrect software variant.

Error code 0x419002 – Unknown hardware version.

Error code 0x419003 – Incorrect hardware variant.

Error code 0x422010 – Drive Unit communication error. Remedy: Check wiring and connections.

Error code 0x423011 – Battery communication error. Remedy: Check wiring and connections.

Error code 0x424012 – Internal communication error. Remedy: Check wiring and connections. If the problem persists, try another on-board computer and a different USB port.

Error code 0x426001 – Internal timeout error.

Error code 0x430002 – Compatibility error. Remedy: The on-board computer is not compatible with eShift. Contact Bosch eBike Service Team.

Error code 0x430013 – Internal on-board computer battery empty. Remedy:

• Purion: Replace the internal battery.

• Nyon, Kiox, Intuvia: Connect display to system and turn on via battery button or charge via USB.

• SmartphoneHub: Charge internal batteries.

If the fault persists after charging, replace the on-board computer.

Error code 0x430020 – The Intuvia battery cannot be charged. Remedy: System can still be switched on via battery button. Contact Bosch eBike Service Team.

Error code 0x431002 – Software version error, earlier software version found. Remedy: Software update.

Error code 0x432002 – Compatibility error. On-board computer is not compatible with eShift.

Error code 0x44001B – Drive Unit compatibility error.

Error code 0x441001 – Sample device; replace via bicycle manufacturer.

Error code 0x44A001 – Drive Unit compatibility error. Remedy: Update Drive Unit software.

Error code 0x44A002 – Battery compatibility error. Remedy: Update battery software.

Error code 0x44A003 – ABS compatibility error. Remedy: Update ABS software.

Additional Purion / Intuvia / Kiox / Nyon / SmartphoneHub Error Codes

Error code 0x450002 – Internal software error.

Error code 0x450010 – Power supply error. Remedy: Check wiring; if it persists, try another on-board computer.

Error code 0x460002 and 0x460003 – Voltage error, surge detected at USB input. Remedy: Check USB cable; disconnect device; reconnect device; perform test drive.

Error code 0x490017 / 0x4A0001 / 0x4A5016 – Internal on-board computer error. Remedy: Check whether keys are blocked; if error persists, try another on-board computer.

Error code 0x4A5018 / 0x4B0024 / 0x4C002A – Internal communication error. Same remedy as above.

Internal memory error (codes 0x4A6010 through 0x4C0039) – Remedy: Try a different on-board computer.

Internal software error (codes 0x4B001F, 0x4B0020, 0x4C003C, 0x4C003D, 0x4C003E) – Remedy: Try another on-board computer.

Error code 0x4B0021 – Internal system communication error. Remedy: Try another on-board computer.

Error code 0x4C0025 – Internal Bluetooth error.

Error code group 0x4C0026–0x4C0027 – Internal compass sensor error.

Error code group 0x4C0028–0x4C0029 – Internal GPS error.

Error code group 0x4C002F–0x4C0030 – Internal pressure sensor error.

Error code 0x4C0031 – Internal temperature sensor error.

Error code 0x4C0032 – External voltage supply too high.

Error code 0x4C0033 – External voltage supply too low.

Internal light sensor error (codes 0x4C0034–0x4C0035).

Error code 0x4C003A – Internal remote control error.

Error code 0x4C003B – Internal display error.

More Internal Errors (4D-series)

Codes 0x4D0001–0x4D7001 – Internal communication error.

Code 0x4D1001 – Internal USB error.

Codes 0x4D3002–0x4D8002 – Internal error.

Error code 0x4D6001 – Battery or rechargeable battery error.

Drive Units – Performance Line, Active Line, etc.

Internal Drive Unit software error (multiple codes 0x50002D to 0x500134) – Motor support switched off.

Error code 0x500200 – Internal software error causing delayed motor support at startup.

Error code 0x502108 / 0x502109 / 0x50212C – Internal light voltage supply error → Light switched off. Remedy: Check front light, wiring, connection; restart.

Error code 0x5B1030 – Internal critical temperature error → Motor support off. Remedy: Let Drive Unit cool.

Error code 0x5B1101 – Internal sensor error causing delayed motor support at startup.

Error code 0x5B1104 – Internal Drive Unit software error → No motor support.

Error code 0x5B111E / 0x5B111F – Internal Drive Unit software error → Motor support off.

Error code 0x5B1124 / 0x5B1125 – Internal sensor error, invalid temperature value.

Active Line Plus, Active Line, Performance Line Speed, Cargo Line

Large group of codes 0x500301–0x500357 etc. – Internal Drive Unit software error → No motor support.

Error code 0x500366 – Battery voltage too high. Remedy: Check for original Bosch components.

Error code 0x501324 – Internal temperature error → eBike system shutdown.

Error code group 0x502108–0x50212C – Light voltage supply error → Light switched off.

Error code 0x50A300–0x50A350 – Internal Drive Unit software error → No motor support.

Error code 0x510005 / 0x510006 – Internal sensor error → Motor support off or delayed.

Error code 0x513002 – Cadence sensor implausible values.

Error code group 0x540001–0x540003 – eBike sensor authentication or communication error. Remedy: Check for original Bosch components.

Light-related overload errors (0x550350–0x550358) – Remedies vary: disconnect lights, check cables, replace faulty lights.

On-board computer short circuit (0x550359) – Disconnect and check on-board computer and wiring.

12 V undervoltage/overvoltage or software errors (0x550360–0x550363).

Drive Unit undervoltage error (0x55A360) – Disconnect consumers from 12 V outlet.

Acceleration sensor configuration/communication/self-test errors (0x5A2001–0x5A2003).

Error code 0x5B1322 / 0x5B1323 – Internal sensor error → invalid microcontroller temperature.

Error code 0x5B1365 – Battery voltage too low.

All Drive Units, eShift

Speed sensor errors (0x503001–0x503004) → Restricted motor support, speed shows 0. Remedy: Check magnet position, check for tampering, test sensor voltage.

Tampering detection (0x504001 / 0x504002) → Limited motor support.

Internal sensor errors (0x510001–0x510006) → Motor support off or delayed; Walk Assist unavailable. Remedy: Software update.

Error code 0x511001 – Acceleration sensor defective.

Error code 0x512001 – ABS and fleet parameter activated. Remedy: Print diagnostic report, update software, clear error, restart.

ABS component recognition/authentication errors (0x520001–0x521002).

ABS communication timeout (0x522001).

Battery authentication errors (0x530001–0x530002).

eBike parameter or configuration errors (0x531001–0x53102E) → Motor support delayed or off. Remedy: Software update.

CAN communication malfunction (0x532001) – No motor support.

Temperature errors (0x540022, 0x54D021).

Inadmissible load (0x550023, 0x550024).

System software or battery software out of date (0x580001–0x580002).

eShift not up to date (0x590001–0x590004).

Drive Unit authentication error (0x591001–0x591002).

Unsupported or incorrect hardware for eShift (0x592001–0x593001).

Shimano Di2 rear derailleur unsupported (0x594001).

CAN communication errors for eShift (0x595001–0x596004).

Internal software/sensor/communication errors (0x5A00E7, 0x5A1001, 0x5A1002, 0x5A1005, 0x5B1126).

Engine calibration error (0x5AA020).

Internal sensor error, delayed support (0x5AA02B).

Battery Systems – PowerPack / PowerTube

Internal battery, charging, discharging, temperature, voltage, communication and configuration errors are listed as codes 0x602040 through 0x6A1006.

Fast Charger (BCS250)

Voltage errors (0xB0B010–0xB0B030) – Remedy: Disconnect from mains for 30 seconds.

Voltage mismatch between charger and battery (0xB0B031) – If persistent, cross-swap battery, cable, or socket.

Charging socket errors (0xB0B110–0xB0B130).

Temperature too high (0xB22100) or too low (0xB22200).

Hardware errors (0xB22300–0xB22400).

Battery voltage error (0xB41000–0xB42000).

Additional charger voltage errors (0xB43000–0xB46000).

Current mismatch (0xB51000) or failed current measurement (0xB52000).

Internal software errors (0xBA1001–0xBC0124, 0xBC0130–0xBC0132, 0xBE1001).

Calibration error (0xBA1005, 0xBA1040).

Incorrect software version (0xBB0000).

Incorrect hardware version (0xBE1002–0xBE1003).

Hardware self-test failed (0xBE1010–0xBE1040).

Error code 113112 on a Bosch Smart System eBike typically indicates a communication or synchronization error within the control unit (the LED Remote or System Controller). This code often appears after a failed software update or if there is a temporary "handshake" issue between the remote and the rest of the bike's components.

​Since you are seeing a 6-digit code, your bike uses the Bosch Smart System (typically models from 2022 onwards).

​Quick Troubleshooting Steps

​The "10-Second" Reset:

​Turn the eBike off.

​Wait at least 10–20 seconds for the system to fully discharge.

​Turn it back on without touching the pedals.

​Check for Firmware Updates:

​Open the Bosch eBike Flow app on your smartphone.

​Connect your bike via Bluetooth.

​Check the "Settings" or "My eBike" section to see if a software update is pending or failed. Often, finishing a stalled update will clear this code.

​Inspect Physical Connections:

​Ensure the cable running from the LED Remote (the buttons on your handlebar) to the rest of the system is securely plugged in and not pinched or damaged.

​If you have a Kiox 300/500 display, remove it from the mount, check that the brass pins are clean and dry, and click it back into place firmly.

​If the Error Persists

​If the code does not go away after a restart and update check, it may indicate a deeper internal memory or configuration error in the control unit itself.

​LEDs Flashing Red: If the lights on your remote are flashing red and the bike provides no motor support, the unit may have "bricked" during an update.

​Dealer Intervention: Unlike older 3-digit codes (like 503), many 113XXX errors require the Bosch Diagnostic Tool, which only authorized dealers have. They can force a factory reset or "re-flash" the component to restore communication.