TL;DR Error 07 = Overvoltage protection. Official guidance (Bafang): Remove/reinsert battery; controller update via BESST; or change battery. Note: Bafang error codes can vary by display/system (UART vs CAN, model families). This page follows Bafang’s official DP C271 display manual wording. Quick fix (safe DIY first) Power off, remove battery (if removable), re-seat firmly. If…
TL;DR Error 05 = The throttle is not back in its correct position. Official guidance (Bafang): Ensure throttle returns to neutral; check connector; replace throttle if needed. Note: Bafang error codes can vary by display/system (UART vs CAN, model families). This page follows Bafang’s official DP C271 display manual wording. Quick fix (safe DIY first)…
TL;DR Error 04 = The throttle has fault. Official guidance (Bafang): Check throttle connector/cable; reconnect; replace throttle if needed. Note: Bafang error codes can vary by display/system (UART vs CAN, model families). This page follows Bafang’s official DP C271 display manual wording. Quick fix (safe DIY first) Reseat the throttle connector (power off first). Inspect…
TL;DR E043 = Part of the cycle computer’s firmware may be damaged/corrupt; assistance may stop. Official next step: Consult an agency/dealer. Quick fix (safe DIY first) Restart the system (battery power). If you can connect to E-TUBE PROJECT, check whether the display/SC unit will accept a firmware re-flash. If the display is glitchy/blank or the…
TL;DR E033 = Current firmware doesn’t support system operation; assistance may stop. Official next step: Connect to E-TUBE PROJECT and update firmware for all units to the latest version. Quick fix (safe DIY first) If you can, connect with E-TUBE PROJECT (app/PC) and check for updates. Make sure your phone/app version is current and the…
TL;DR E031 = Chain tension may not be adjusted or the crank may not be installed properly; assist may not work (shifting may still work). Official next step: Consult an agency/dealer. Quick fix (safe DIY first) If your bike uses a chain drive with adjustable tension, do a basic visual check for extremely tight/loose tension….
TL;DR E030 = A setting error was detected; assistance may stop. Official next step: Restart using the battery power switch; if it persists, consult an agency. Quick fix (safe DIY first) Restart the system (battery power). If you recently changed settings/components, revert what changed (if possible). If you use E-TUBE PROJECT, confirm all units are…
TL;DR E025 = Displayed when a genuine drive unit is not connected or when cables are disconnected; system may not start. Official next step: Connect a genuine battery/drive unit and check cable condition. Quick fix (safe DIY first) If this appeared after service, re-check every connector the shop may have unplugged. Confirm the battery is…
TL;DR E024 = A communication error with the bicycle system; system may not start. Official next step: Make sure cables are not loose or improperly connected. Quick fix (safe DIY first) Power off; check that the visible connectors (display, switch, battery mount) are seated. Re-seat removable display and restart. If it keeps returning, have a…
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…
