Shimano STEPS error and warning codes: W and E code list

Shimano drive units show two kinds of codes. A W code is a warning that clears once the cause goes away. An E code is an error that stops assist or the whole system until it is fixed. This page lists the codes Shimano publishes in its E8000 series user's manual, which covers the SC-E8000, SC-E6010, SC-E6100 and SC-E7000 cycle computers (E8000 user's manual), plus codes from Shimano's newer manuals and FAQ. For the basics, start with Shimano STEPS troubleshooting.

How to read and look up a code

1. Note the code on the cycle computer, or connect E-TUBE PROJECT Cyclist, which checks for errors and warnings (Shimano FAQ).
2. Look it up in Shimano's online error lookup, where you pick E or W and enter the number (Shimano assist checks). The lookup also covers codes not in this list, such as E030 and W101, so the lookup and your own manual come first.
3. Listen for beeps. Three short beeps mean an error or warning. Two short beeps mean a wrong or blocked switch press (Shimano FAQ).

If an error fills the whole SC-E8000 screen, clear it with the battery's power button or by taking the battery out of its holder. If it returns, see a dealer (E8000 user's manual).

Warnings (W codes)

• W010: the drive unit is hotter than normal and assist may drop. Stop using assist until it cools.
• W011: speed can't be detected, so top assist speed may be lower. The speed sensor may have moved or the magnet may have come off. See align speed sensor magnet.
• W013: torque sensor setup didn't finish and assist may be weak. Turn the power on again with your feet off the pedals.
• W020: the battery is outside its temperature range and nothing will start. Move a hot battery somewhere cool and out of the sun, or bring a cold one indoors to warm up.
• W032: an electronic derailleur is fitted where the system expects a mechanical one, and walk assist may be weaker. The system needs the derailleur type it was set up for.
• W967: shown in the E-TUBE RIDE app when the E-BIKE system lock is on. Disengage the lock to ride (Shimano FAQ).

Errors (E codes)

• E010: general system error, no assist. Turn the system on again with the battery's power button.
• E013: drive unit firmware problem, no assist. See a dealer.
• E014: the speed sensor may be in the wrong place, no assist. See a dealer.
• E020: battery and drive unit can't talk, no assist. Check the cable between them is properly plugged in.
• E021: the battery meets standards but isn't supported, no assist. Restart with the battery's power button.
• E022: the battery doesn't meet the system's standards, and nothing starts. Restart, then see a dealer.
• E023: internal electrical fault in the battery, and nothing starts. Turn off with the battery button and back on.
• E024: communication error with the bike's system, and nothing starts. Check no cable is loose.
• E025: a genuine drive unit isn't connected or a cable is unplugged. Use the genuine battery and drive unit and check the cables.
• E033: the firmware doesn't support the setup, no assist. All units need a firmware update.
• E043: part of the cycle computer's firmware may be damaged, no assist. See a dealer.

All of the above come from the E8000 user's manual.

Tampering and Safe Mode

• E295: the system has detected tampering. A restart clears it for a while.
• E299: Safe Mode, after E295 has shown too many times. Assist stops, and only a Shimano office or authorized distributor can lift it with a special device (EP8, EP6 and EP5 manual).

When to see a Shimano dealer

• Any E code that returns after a restart, and any W code that won't clear.
• Firmware updates, which shops do with E-TUBE PROJECT Professional (Shimano FAQ).
• Speed sensor position, cable faults and Safe Mode.

More help: Shimano motors explained, e-bike error codes and when to call a pro.

Sources

• E8000 user's manual, si.shimano.com
• Shimano FAQ, bike.shimano.com
• Shimano assist checks, si.shimano.com
• EP8, EP6 and EP5 manual, si.shimano.com

Stuck after these checks? Find a shop near you.