Bosch E-Bike Error Code 430 (Internal Battery of On-Board Computer Flat): Meaning + Fix
TL;DR
Bosch error code 430 means the internal battery of the on-board computer is flat (Bosch notes this does not apply to BUI350). Official guidance: charge the on-board computer (in the holder or via USB port).
Do this first:
1. Charge the on-board computer in its holder/mount (if your model supports it).
2. If your display supports it, charge via the USB port.
3. Restart the system after charging and re-check.
What this code means (Bosch official intent)
Bosch error code 430 means the internal battery of the on-board computer is flat (Bosch notes this does not apply to BUI350). Official guidance: charge the on-board computer (in the holder or via USB port).
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
- Is the display properly seated in the holder/mount?
- If your unit charges in the holder, confirm the holder contacts look clean and undamaged.
- If charging via USB, try another known-good cable/charger.
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
- The on-board computer hasn’t been charged for a long time (internal battery drained).
- Poor contact at the holder/mount preventing charging.
- USB charging cable/port issue (less common).
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-display-troubleshooting/
– https://jieli-electric.com/e-bike-usb-port-not-working/
Notes (practical)
- If you never see the on-board computer charge in the holder, the holder contacts are often the culprit.