Pedalwise
Reference

Bafang error codes: full list with safe checks

Bafang's two digit error codes grouped by part, with what a rider can safely check, which codes need a shop, and why the meaning depends on your display.

Last edited Nov 8, 2026 by Pedalwise team Edit History Add a subpage

The Pedalwise team started this page from official manuals, support pages and repair videos. Fixed this yourself, or spotted something wrong? Help improve it.

Battery and electrical safety. Lithium-ion batteries can catch fire if they're damaged or charged wrong. Never open a battery pack, and stop using any battery that's swollen, hot, wet or smells burnt. Every edit to this page is checked by a second person before it goes live.

Bafang error codes show as a two digit number on the display, next to a warning icon. The meaning depends on your display and controller, so treat this list as a guide and check your own display's manual. It comes from Bafang's DP C271.CAN display manual (DP C271 manual), with notes from Bafang's FAQ (Bafang FAQ). For the basics, start with Bafang troubleshooting.

Before you look up a code

  1. Restart the system. Bafang says to do this first, and to contact your dealer if the code stays (DP C271 manual).
  2. On displays like the DP C271, open Settings, then Information, then Error Code, to see the last ten errors. 00 means no error.
  3. Many of Bafang's next steps use its BESST tool or swap parts. That is shop work (Bafang BESST).

Throttle, brakes and controls

  • 04: throttle fault on the DP C271. Bafang's FAQ uses 04 for a throttle that has not returned to its rest position. Check the throttle springs back freely and its plug is pushed home. Don't ride with a sticking throttle. See throttle not working.
  • 05: throttle not back in its rest position. Same checks as 04.
  • 33: brake signal fault, on bikes with brake sensors. Check the brake sensor plugs. See check brake cutoff and throttle.
  • 36: keypad detection circuit fault. Shop: update or replace the controller.
  • 61: gear shift detection fault. Check the shifter isn't jammed.
  • 62: electronic derailleur won't release. Shop.
  • 71: electronic lock jammed. Shop.
  • 81: Bluetooth module fault. Shop.

Motor and sensors

  • 08: hall sensor signal fault in the motor. Check the motor plug is fully connected. If it stays, shop. See motor cable and hall sensors.
  • 09: motor phase fault. Shop.
  • 10: motor too hot. Power off and let it cool. If it keeps coming back, shop.
  • 11: motor temperature sensor fault. Shop.
  • 21: speed sensor fault. Restart and check the magnet sits 10 to 20 mm from the sensor and the plug is in. See align speed sensor magnet.
  • 25: torque signal fault. Check connections, then shop.
  • 26: torque sensor speed signal fault. Check connections, then shop.

Controller and communication

  • 07: overvoltage protection. Remove and refit the battery. If it stays, shop.
  • 12: controller current sensor fault. Shop.
  • 14: controller too hot. Let it cool and restart.
  • 15: controller temperature sensor fault. Let it cool and restart, then shop.
  • 27: controller overcurrent. Shop.
  • 30: communication fault. Check every connector for loose plugs or damage with the battery out, then shop. See inspect and clean connectors.
  • 35: 15V detection circuit fault. Shop.
  • 37: watchdog circuit fault. Shop.

Battery

  • 13: battery temperature sensor fault. Check the battery is seated, then shop.
  • 41: total battery voltage too high. Shop.
  • 42: total battery voltage too low. Charge the battery. If it stays, shop.
  • 43: total cell power too high. Shop.
  • 44: a single cell voltage too high. Shop.
  • 45: battery too hot. Let it cool.
  • 46: battery too cold. Bring it to room temperature.
  • 47 and 48: battery state of charge too high or too low. Shop.

Battery codes that won't clear mean the battery needs a pro. Never open a battery, try to reset it or bypass its protection. See battery won't charge and e-bike battery care.

Common faults without a code

Bafang's FAQ also has fix sheets for problems that show no number, including a display that won't power on (CF02), a runaway motor (CF03), e-brake not working (CF04), lights not working (CF05), walk assist not working (CF06), throttle not working (CF07) and short range (CF08) (Bafang FAQ).

If the motor runs on by itself or keeps driving when you brake, switch off, remove the battery and don't ride until a shop has checked it.

When to see a shop

  • Any code that returns after a restart.
  • Motor, controller, sensor and battery faults marked shop above.
  • Any job that needs BESST, a new controller or a new display matched to your bike.

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

Sources

Stuck after these checks? Find a shop near you.

Need a pro?

If these steps didn't fix it, find a shop near you in our partner network. For battery or wiring trouble, look for shops marked Battery and electrical.

Talk

Questions, things that worked for you, or something that looks wrong on this page.

Sign in to join the conversation.

CC BY-NC-SA 4.0Text by Pedalwise and contributors, shared under CC BY-NC-SA 4.0. Linked videos and manuals keep their own terms. How to reuse it