Home › Shimano STEPS › Error E033
Shimano STEPS error E033: Firmware update required
Shimano STEPS (all drive units, shown on SC-E5000/E6100/E7000/E8000 displays and via EW-EN100 LED)Dealer neededSafe to keep riding
E033 means the firmware of the drive unit or a connected component is not at a version the system accepts, typically after one part was updated or replaced. The bike often still works with reduced function, but the code stays until everything is on matching firmware.
Likely causes
- One component updated (via app) while others were left on older firmware
- Replacement part shipped with a different firmware version
- Drive unit exchanged under warranty without a follow-up full update
- Update interrupted before all components were done
How to fix Shimano STEPS error E033
- Connect with the E-TUBE PROJECT Cyclist app (Bluetooth via the display or EW-EN100) and let it check all components for updates
- Charge the battery above 50 percent before updating and keep the phone close to the bike
- Update every component the app lists, not just the drive unit
- If the app cannot update a component, the dealer's wired E-TUBE PROJECT Professional will
Go to a dealer if: A dealer is needed when the consumer app cannot see or update the affected component; the wired professional tool can update every part on the bus.
Warranty: Firmware updates are normally free at the dealer within the warranty period and low-cost afterwards.
Typical cost: Usually free / DIY with the app; otherwise a short labour charge.
Warranty: Firmware updates are normally free at the dealer within the warranty period and low-cost afterwards.
Typical cost: Usually free / DIY with the app; otherwise a short labour charge.
Still stuck? Take a photo of the display and show it to a local e-bike workshop. Bring the bike's system name (e.g. Bosch Performance Line CX) and the exact code; that saves diagnostic time and money.
Frequently asked
Can I reset E033 myself?
Yes, by completing the firmware update with the E-TUBE app or at a dealer.
Can I keep riding with E033?
Yes, generally you can keep riding; some functions may be limited until updated.
Is E033 covered by warranty?
Firmware updates are a service item, but dealers usually do them free in warranty.
Related Shimano STEPS codes
Not an official Shimano STEPS document. Compiled from workshop experience and public service information; details can differ per system version and bike brand.