Shimano STEPS Error Code E023 (Battery Internal Electrical Failure): What It Means
TL;DR
E023 = An electrical failure inside the battery is indicated; system may not start.
Official next step: Turn power off then on with the battery power button. If it persists, consult a dealer/distributor.
Quick fix (safe DIY first)
- Power the system off and back on using the battery power button.
- If you have a second known-good battery, test (only if it’s supported for your system).
- If it repeats, treat it as a battery diagnostic/replacement situation.
60-second checks (the things that cause repeat codes)
- Does it happen after charging? Try a different outlet/charger if available (genuine Shimano).
- Any signs of overheating, swelling, or water ingress? If yes, stop using it.
What usually causes E023
- 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
- Do not open the battery housing; lithium battery work is hazardous.
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/