If you ride a bike with a Bosch drive system and your display shows an error code, this page helps you:
- understand what the code means,
- run the safe DIY checks first,
- and know when it’s time to stop and see a dealer.
This hub currently contains 36 code pages for Bosch.
Start here: the 60‑second “don’t make it worse” checklist
- Stop safely and take a photo of the code (and any blinking patterns).
- Power off fully (wait ~10–20 seconds). If needed, remove the battery briefly.
- Check the obvious connectors you can reach without disassembly (battery seat, display mount, visible harness plugs).
- If the bike cuts power unpredictably, smells hot, or shows battery/over‑current faults: stop riding and get it inspected.
Choose your path (quick decision tool)
| What you’re seeing | Do this first | When to stop DIY |
|---|---|---|
| Code shows after rain / washing | Dry contacts, reseat connectors, restart | Corrosion, bent pins, repeat code |
| Code shows only on bumps | Suspect loose battery/connector fit | Repeat cutouts in traffic |
| Code appears right after charging | Let battery rest, restart, re-check | Battery voltage / internal faults repeat |
| Code appears during hard climbs | Lower assist, increase cadence, cool down | Overheat/overcurrent keeps returning |
| Code returns immediately on restart | Go straight to the code page below | Dealer-level diagnostics likely |
Good “first pages” to check
Start with the closest match, then follow the related links at the bottom of each page (that’s the closed‑loop).
- Error 419 — Configuration Error): Meaning + What to Do
- Error 422 — Drive Unit Connection Problem): Meaning + Fix Checklist
- Error 423 — Battery Connection Problem): Meaning + Fix Checklist
- Error 424 — Communication Problem Between Components): Fix Checklist
- Error 426 — Internal Time-Out Error): What It Means + Next Steps
- Error 430 — Internal Battery of On-Board Computer Flat): Meaning + Fix
Browse all Bosch codes by topic
Speed sensor & speed signal
- Error 503 — Speed Sensor Fault): Meaning + Fixes
- Error 504 — Speed Signal Distortion / Tampering Detected): What It Means
- Error 510 — Internal Sensor Fault): Meaning + Fix Checklist
Battery & charging
- Error 423 — Battery Connection Problem): Meaning + Fix Checklist
- Error 430 — Internal Battery of On-Board Computer Flat): Meaning + Fix
- Error 530 — Battery Fault): Meaning + What To Do
- Error 602 — Internal Battery Fault): Meaning + Next Steps
- Error 603 — Internal Battery Fault): Meaning + Next Steps
- Error 605 — Battery Temperature Error): Meaning + What to Do
- Error 606 — External Battery Fault): Meaning + Wiring Checks
- Error 610 — Battery Voltage Error): Meaning + Next Steps
- Error 620 — Charger Fault): Meaning + Fixes
- Error 640 — Internal Battery Fault): Meaning + Fix Checklist
- Error 655 — Multiple Battery Faults): Meaning + Fix Steps
Communication & wiring
- Error 422 — Drive Unit Connection Problem): Meaning + Fix Checklist
- Error 424 — Communication Problem Between Components): Fix Checklist
- Error 595 — Communication Error): Meaning + Fix Steps
- Error 596 — Communication Error): What to Check
Software, firmware & configuration
- Error 419 — Configuration Error): Meaning + What to Do
- Error 431 — Software Version Error): Meaning + Fix
- Error 450 — Internal Software Error): Meaning + Fix Steps
- Error 531 — Configuration Error): Meaning + Fix Steps
- Error 580 — Software Version Error): Meaning + Fix
- Error 591 — Authentication Error): Meaning + Fix Steps
- Error 592 — Incompatible Component): What It Means
- Error 593 — Configuration Error): Meaning + What to Do
- Error 656 — Software Version Error): Dealer Update Required
Overheating & temperature
Brakes, lights & accessories
Other / general
- Error 426 — Internal Time-Out Error): What It Means + Next Steps
- Error 440 — Internal Drive Unit Fault): Meaning + Next Steps
- Error 460 — USB Port Error): Meaning + Fix
- Error 490 — Internal Fault of the On-Board Computer): What to Do
- Error 500 — Internal Drive Unit Fault): Meaning + Fix
- Error 511 — Internal Drive Unit Fault): Meaning + What To Do
- Error 550 — Impermissible Load / Unauthorized Accessory): Fix Checklist
Common mistakes that waste time (and cause repeat codes)
| Mistake | What it causes | Better move |
|---|---|---|
| Turning the bike on while pushing hard on the pedals | Sensor init errors / instant re-trigger | Power on with no load on pedals |
| Pressure-washing the motor/battery/display area | Water in connectors → comm faults | Gentle rinse, then dry + protect contacts |
| Ignoring “only happens on bumps” | Intermittent power loss (unsafe) | Check battery latch/seat + harness strain |
| Chasing firmware without basics | Repeat faults + partial updates | Do connectors first, then update all units |
| Riding through battery/overcurrent faults | Heat + damage risk | Stop riding; get battery/controller checked |
Related site tools (keep the hub loop)
- All brands: https://jieli-electric.com/e-bike-error-codes/
- E‑bike class decision tool: https://jieli-electric.com/e-bike-class-decision-tool/
- Mods & DIY legal checklist: https://jieli-electric.com/e-bike-mods-diy-kits-legal-checklist/
- Speed & power thresholds: https://jieli-electric.com/speed-power-thresholds/
- Laws & Safety hub: https://jieli-electric.com/laws-safety/
Official resources (for this brand)
- Bosch eBike Systems Help Center (error codes): https://help.bosch-ebike.com/
- Bosch eBike dealer locator / support pages: https://www.bosch-ebike.com/