Shimano STEPS error E024: Battery overcurrent protection triggered
The battery management circuit has detected an overcurrent condition and shut down output to protect the cells and drive unit, which the system logs as a communication error between battery and drive unit. Motor assist is cut, walk assist is disabled, and the speed display may drop to zero. The bike will still switch on and lights will work, but no propulsion is available until the fault clears.
| Drive system | Shimano STEPS (E5000, E6100, E7000, E8000, EP6, EP801) |
| Severity | Dealer needed |
| Keep riding? | Do not keep riding |
| Typical cost | Dealer diagnostic typically runs 40 to 80 EUR; cleaning and reseating is often free if done at the point of sale, a replacement wiring harness 60 to 150 EUR, and a new genuine Shimano battery 550 to 900 EUR fitted. |
Likely causes
- Dirty or oxidised contacts between battery and cradle on the frame
- Loose battery mounting so the pack is not fully seated in its dock
- Moisture or corrosion inside the battery or motor connector
- Damaged or pinched wiring harness between battery and drive unit
- Mismatched or non-genuine battery fitted after a previous replacement
- Firmware version on the battery not matching the drive unit after an update
How to fix Shimano STEPS error E024
- Switch the display off and remove the key if fitted.
- Hold the battery power button for at least five seconds to fully power down, then press it again to wake the pack.
- Take the battery out and wipe the contact pins on both the pack and the frame cradle with a dry, lint-free cloth.
- Reseat the battery until it clicks and locks, then power the system on and check the display.
- Ride a short distance on a flat surface to confirm the code has cleared.
- If E024 returns immediately or within a few minutes, stop riding and take the bike to an authorised Shimano dealer for diagnostic.
- Do not attempt to open the battery or motor yourself; the dealer will run a system diagnostic and check the wiring and component compatibility.
Warranty: A genuine Shimano battery or drive unit failure inside the standard two-year warranty period is normally covered as a manufacturing defect, while water ingress, crash damage, and use of non-approved batteries are excluded.
Typical cost: Dealer diagnostic typically runs 40 to 80 EUR; cleaning and reseating is often free if done at the point of sale, a replacement wiring harness 60 to 150 EUR, and a new genuine Shimano battery 550 to 900 EUR fitted.
Frequently asked
Can I reset Shimano error E024?
Yes, in most cases. Turn the system off, hold the battery power button for five seconds to fully discharge the control board, then power the pack back on with the battery firmly seated. If the code reappears within a minute, the reset has not held and the bike needs dealer attention.
Is it safe to keep riding with E024?
No. Motor assist is disabled, so on hills or in traffic the bike behaves like an unpowered bicycle with the added weight of the system. Continuing to ride does not cause further damage, but the loss of assist can be a safety hazard on gradients.
How much will the repair cost and is it under warranty?
If the battery or drive unit is diagnosed as faulty within two years of purchase, Shimano typically covers the part under warranty and you pay only labour of around 40 to 80 EUR. Out of warranty, expect 550 to 900 EUR for a genuine replacement battery plus fitting.
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.