Shimano STEPS error E023: Battery electrical abnormality detected
The Shimano STEPS system has detected an electrical abnormality inside the battery pack. Motor assistance is cut off and walk assist is disabled until the fault clears, so the bike rides like a normal unpowered bicycle. The display continues to show the E023 code so a technician can diagnose the battery.
| Drive system | Shimano STEPS (E5000, E6100, E7000, E8000, EP6, EP801) |
| Severity | Dealer needed |
| Keep riding? | Do not keep riding |
| Typical cost | Battery diagnostics at a dealer typically run €30 to €80, and a replacement Shimano STEPS battery, if required, costs roughly €450 to €900 fitted depending on capacity and model. |
Likely causes
- Loose, dirty, or corroded contacts between the battery and the mount on the frame
- Internal cell voltage imbalance inside the battery pack
- Water or moisture ingress into the battery casing or connector
- Damaged battery cable, connector, or wiring loom between battery and drive unit
- Battery firmware mismatch after a system or dealer software update
- Genuine BMS (battery management system) hardware failure inside the pack
How to fix Shimano STEPS error E023
- 1. Switch off the system and remove the battery from its mount.
- 2. Inspect the battery terminals and the frame mount contacts for dirt, corrosion, or moisture; wipe clean with a dry cloth.
- 3. Check the battery casing for visible damage, swelling, cracks, or signs of water ingress.
- 4. Refit the battery, confirm it clicks fully into place, and switch the system on to see if the code clears.
- 5. If the code returns, leave the battery off the bike for a few minutes, refit, and try once more.
- 6. If E023 reappears, contact the place of purchase or an authorised Shimano dealer for diagnostic testing and warranty handling.
Warranty: A genuine internal battery fault inside the two-year Shimano warranty window is normally covered; water ingress, physical impact, crash damage, and consumable wear on the battery are excluded.
Typical cost: Battery diagnostics at a dealer typically run €30 to €80, and a replacement Shimano STEPS battery, if required, costs roughly €450 to €900 fitted depending on capacity and model.
Frequently asked
Can I reset Shimano error E023?
Shimano error E023 cannot be cleared by the rider using the normal power cycle or button sequence, because it is triggered by an internal battery condition the system treats as a hard fault. If the code stays on after removing, inspecting, and refitting the battery, it remains stored until a dealer runs Shimano diagnostic software.
Is it safe to keep riding with Shimano E023?
No, E023 disables motor assistance and walk assist, so the bike still rolls like a normal bicycle but cannot be assisted or motor-walked up hills. Riding without power will not worsen the battery fault, but plan a route home or transport because assistance will not return on its own.
Will the battery be replaced under warranty, and what does it cost?
If the dealer diagnostic confirms a genuine internal battery fault within the Shimano warranty period (typically two years from purchase), the battery is replaced at no cost to the rider. Outside warranty, a new Shimano STEPS battery runs roughly €450 to €900 fitted, depending on capacity and model.
Related Shimano STEPS codes
Manuals and video
Official source: si.shimano.com
Not an official Shimano STEPS document. Compiled from workshop experience and public service information; details can differ per system version and bike brand.