Shimano STEPS Error Code E013 (Drive Unit Firmware Error): Meaning + What to Do
TL;DR
E013 = An anomaly/error was detected in the drive unit firmware; assistance may stop.
Official next step: If it persists, contact a dealer/agency. (Some manuals also suggest checking the speed sensor placement first.)
Quick fix (safe DIY first)
- Restart the system (battery power switch/button).
- If your bike uses a spoke magnet + speed sensor, confirm the sensor is aligned and secure.
- If you have access to E-TUBE PROJECT (app/PC), check for firmware updates once the bike is stable.
60-second checks (the things that cause repeat codes)
- Did this begin after a component swap (display, battery, motor service) or firmware update?
- Any intermittent speed-sensor readings (often shows as speed dropping to 0 while moving)?
What usually causes E013
- Loose or intermittent connectors (battery mount, motor harness, display/switch).
- Water/corrosion at contacts after rain/washing.
- Firmware/compatibility mismatch after service or a component swap.
- In some cases, an internal sensor or control-unit fault that needs dealer diagnostics.
When to stop DIY (go to a Shimano STEPS dealer)
Go to a dealer if:
– The code returns immediately after a clean restart.
– Assistance cuts in/out while riding (safety issue).
– You see damaged wiring, bent pins, corrosion, or water intrusion.
– The official remedy for the code is “consult an agency/dealer.”
Don’t do this
- Don’t attempt unofficial firmware hacks; dealer tooling is safest for compatibility issues.
Related guides (closed-loop)
- Shimano STEPS error codes index: https://jieli-electric.com/shimano-steps-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/