Bosch E-Bike Error Code 431 (Software Version Error): Meaning + Fix

Byhenry January 25, 2026January 25, 2026

Table of Contents

TL;DR

Bosch error code 431 indicates a software version error. Official guidance: restart; if it persists, contact a Bosch eBike dealer.

Do this first:
1. Restart the system (off → wait 10–20 seconds → on).
2. If you recently updated firmware or replaced a display/component, note the timing (it helps dealer diagnostics).
3. If the error persists, contact a Bosch eBike dealer (a software update/configuration check may be required).

What this code means (Bosch official intent)

Bosch error code 431 indicates a software version error. Official guidance: restart; if it persists, contact a Bosch eBike dealer.

Quick fixes (safe DIY first)

1) Proper restart (the Bosch way)

Turn the system off.
Wait 10–20 seconds.
Turn the system on and re-check.

2) 60-second check

Did the code appear right after an update or service?
If you use the Bosch Flow app (Smart System), check for available updates (when the system is stable).
Reseat the display (if removable) and restart.

3) If it started after rain / washing

Assume moisture at a connector/contact point.
Dry naturally, then re-check connectors (avoid pressure washing around the motor/display).

Most common causes

Software/firmware mismatch between components.
Interrupted update or configuration after a component swap.
Internal software state fault that needs dealer tools to resolve.

When to stop DIY and go to a Bosch dealer

Go to a dealer if:
– The code returns after a restart and basic checks.
– You find damaged wiring, bent pins, corrosion, or signs of water ingress.
– The official guidance for this code says dealer (many do).

Related guides on this site (closed-loop)

Bosch system index: https://jieli-electric.com/bosch-e-bike-error-codes/
E-bike error codes hub: https://jieli-electric.com/e-bike-error-codes/
Speed & power thresholds: https://jieli-electric.com/speed-power-thresholds/
Laws & Safety Hub: https://jieli-electric.com/laws-safety/

More troubleshooting (optional):
– https://jieli-electric.com/bosch-software-update-firmware-issues/
– https://jieli-electric.com/bosch-display-troubleshooting/

Notes (practical)

If 431 keeps returning, avoid repeated power-cycling during updates—get dealer help to prevent config drift.

Sources (official-first)

https://help.bosch-ebike.com/us/help-center/error/431

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