Torque sensor speed signal fault

Stop riding Last verified: pending review Reviewed by: editorial team

Quick answer

Error code 26 indicates a fault with the speed signal from the torque sensor. This issue prevents the motor from functioning, as the system relies on accurate sensor data to operate correctly.

Stop riding Sensor Often DIY-friendly Intermediate (30–60 min)

Does this apply to your bike?

H700 · Bafang · Common displays: DP E171

Heads-up: the same number can mean different things on other systems — always check your drive system first. Browse all drive systems →

What you’ll notice

The display shows error code 26, and the motor is non-functional.

Likely causes, ranked

Start at #1 — causes are ordered by how often they turn out to be the problem.

#1 Faulty Torque Sensor

How to check: Inspect the torque sensor for damage or disconnection.

#2 Damaged Connectors

How to check: Check all connectors for corrosion, loose connections, or dirt.

#3 Signal Reading Issues

How to check: Connect the pedelec to the BESST tool to check the torque sensor signal.

Troubleshooting steps

Inspect Connectors

easy

Check all connectors on the pedelec for damage or corrosion.

If it passes →Proceed to check the torque sensor signal.

If it fails →Repair or replace damaged connectors.
Check Torque Sensor Signal

Tools: BESST tool intermediate

Use the BESST tool to diagnose the torque sensor signal.

If it passes →If the signal is normal, proceed to replace the display.

If it fails →Replace the torque sensor.
Replace Display

Tools: screwdriver intermediate

If the torque sensor signal is normal, replace the display unit.

If it passes →Check if the system returns to normal.

If it fails →Update the controller using BESST.
Update Controller

Tools: BESST tool intermediate

If the display replacement does not resolve the issue, update the controller.

If it passes →Check if the system returns to normal.

If it fails →Replace the torque sensor.
Replace Torque Sensor

Tools: screwdriver advanced

If all previous steps fail, replace the torque sensor.

If it passes →Clear the error code and check system functionality.

If it fails →Contact Bafang for further assistance.

When to stop and get professional help

If the motor does not function after all troubleshooting steps, seek professional help.

Never open, puncture, or disassemble the battery pack, and never bypass the BMS. See our safety guide.

More codes for H700

15 · Controller temperature sensor fault 21 · Speed sensor fault 25 · Torque signal fault 27 · Over current of the controller 30 · Communication failed 33 · Brake detection circuit is fault

Different number? Type it into the search box at the top of the page.

Did this fix your problem?

None% of riders reported this solved

Sources & verification

Last verified: pending review Reviewed by: editorial team

Missing a code or step? Tell us.

Spotted a code we don’t cover, or a step that didn’t match your bike? Send it in — submissions shape what we research next.