E-bike reference

42 e-bike error codes, explained in plain language.

What does the code on your display mean? Causes, roadside self-help and sources — for Bosch, Shimano STEPS, Yamaha and more. Free and maintained with love for the detail. Enjoy the ride!

Bosch eBike Systems Display

430

Internal battery of the on-board computer flat

The small internal buffer battery of the on-board computer is discharged, typically after long storage or when the display was used off the bike for a long time. According to Bosch this code does not apply to the BUI350 (Nyon 2). Charging the display in its holder or via USB resolves the issue.

Drive system
Bosch eBike Systems
Category
Display
Motor behavior
assist unaffected
DIY-friendly?
possible

Roadside self-help

  1. Put the display into its holder and switch the eBike on so it charges from the main battery
  2. Alternatively charge the on-board computer via the USB port

Possible causes

  • Discharge after long storage high
  • Poor contact in the display holder medium
  • Aged internal buffer battery low

Symptoms

  • Error 430 on the display
  • Display does not start or shuts off when removed from the holder

Inspection / repair

  • Difficulty: easy
  • DIY: possible
  • no dealer tool needed
  • Component: on board computer
  • Component: display internal battery

Applies to

Sources

How to read e-bike error codes

Unlike cars (OBD-II), e-bike codes are manufacturer-specific: the same number means something different on a Bosch than on a Shimano system. What matters is always the combination of drive system and code.