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Bosch eBike error codes: full list for Bosch eBike system 2

Every error code in Bosch's Kiox manual for Bosch eBike system 2, grouped by part, with what the rider can safely try and when to see a Bosch dealer.

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This page lists the error codes Bosch publishes for Bosch eBike system 2, with what each means and what you can safely try. The list comes from Bosch's owner's manual for the Kiox (BUI330) on-board computer (Kiox manual). Other displays may show codes differently, so check the manual for your own display too. For the basics, start with Bosch eBike troubleshooting.

Smart system bikes use different displays and the eBike Flow app. Check your display's own manual, and ask your dealer, whose DiagnosticTool can read out eBike information (Bosch dealer service).

Before you look up a code

  1. Note the exact number on the display.
  2. Switch the system off, wait, and switch it back on. For most codes this is Bosch's first step.
  3. If the code comes back, follow the line below, then see a Bosch dealer.

The drive may switch itself off when an error shows. Bosch says you can keep pedaling without assist, but have the bike checked before your next ride (Kiox manual).

Buttons and display

  • 410: a button on the on-board computer is blocked. Check for a stuck button, for example from dirt, and clean it.
  • 418: a button on the operating unit is blocked. Check and clean as for 410.
  • 430: the on-board computer's own battery is flat. Charge it in its holder or by USB.
  • 460: a fault at the USB port. Unplug the cable. If it stays, see a dealer.
  • 490: an internal fault in the on-board computer. Have it checked by a dealer.
  • Blank display: an internal fault in the on-board computer. Switch the system off and on again.

Connections and communication

  • 414: connection problem with the operating unit. Have the connections checked.
  • 422: connection problem with the drive unit. Have the connections checked.
  • 423: connection problem with the eBike battery. Have the connections checked.
  • 424: parts can't talk to each other properly. Have the connections checked.
  • 595 and 596: communication error. Bosch suggests checking the drive wiring, then a restart. Leave the wiring check to a dealer.

Drive unit, software and configuration

  • 419, 531 and 593: configuration error. Restart, then see a dealer.
  • 426: internal timeout. Restart, then see a dealer. Bosch notes the wheel circumference can't be adjusted in this state.
  • 431 and 580: software version error. Restart, then see a dealer.
  • 440, 500 and 511: internal drive unit fault. Restart, then see a dealer.
  • 450: internal software error. Restart, then see a dealer.
  • 510: internal sensor fault. Restart, then see a dealer.
  • 591: authentication error. Switch off, remove and refit the battery, then restart.
  • 592: incompatible part. Use a compatible display.
  • 656: software version error. A dealer needs to update the software.

Sensors, lights and load

  • 502: bike light fault. Check the light and its cable, then restart.
  • 503: speed sensor fault. Restart, then see a dealer.
  • 504: speed signal distortion. Check the spoke magnet position. Bosch also checks for tampering, and assist is reduced while this code shows. See align speed sensor magnet.
  • 540: temperature outside the permitted range. Switch off and let the drive unit warm up or cool down, then restart.
  • 550: an impermissible load was detected. Remove the load, then restart.

Battery and charger

  • 530: battery fault. Switch off, remove and refit the battery, then restart.
  • 602, 603 and 640: internal battery fault. Restart, then see a dealer.
  • 605: battery temperature outside the permitted range. Let the battery warm up or cool down, then restart.
  • 606: external battery fault. Bosch mentions checking the wiring. Leave that to a dealer.
  • 610: battery voltage error. Restart, then see a dealer.
  • 620: charger fault. Bosch says to replace the charger and contact your dealer. See check your charger.
  • 655: several battery faults. Switch off, remove and refit the battery, then restart.

Other parts

  • 7xx: a fault in a part not made by Bosch. Follow that part maker's instructions.

For any battery or charger code that won't clear, stop charging and riding and see a Bosch dealer. Never open the battery or drive unit, and never try to clear a tampering code yourself. See battery won't charge.

When to see a Bosch dealer

  • Any code that returns after a restart.
  • Any connection, wiring, software or internal fault code.
  • Battery and charger codes that don't clear when the battery is at room temperature.

More help: e-bike error codes, Bosch motors explained and when to call a pro.

Videos

Fix the Bosch E-bike 503 Error and Speed Not Reading from Bike Shop Girl: Clears the common 503 speed sensor code on a Bosch system by finding the spoke magnet and lining it up with the sensor again.

Sources

Stuck after these checks? Find a shop near you.

Need a pro?

If these steps didn't fix it, find a shop near you in our partner network. For battery or wiring trouble, look for shops marked Battery and electrical.

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