Bafang DP E170.CAN / E180.CAN / E181.CAN code list · Bafang DP E170 / E180 / E181 Display

Error 81 on Bafang DP E170 / E180 / E181 Display

What it means + how to fix it From the manual

Quick answer

Error 81 on the Bafang E170 / E180 / E181 means “Bluetooth module has an error.” Most likely cause: a fault in the display's Bluetooth module. Try this first: restart the system first.

Try this first

Free, and each takes under 5 minutes.

Restart the system first
Forget and re-pair the bike

In plain English

The Bluetooth part of the system has a fault. Restart and re-pair your phone first. If it stays, the manual's answer is your retailer.

Step-by-step checklist

Work from the top. Steps go from free and easy to shop jobs. Switch the bike off before touching any connector. Tick each step as you go. Your progress is saved on this device.

1Restart the system firstFree Bafang's manual says to restart first whenever an error code appears: switch the system off, wait a few seconds, then switch it back on. If the code doesn't go away, carry on with the steps below.
2Forget and re-pair the bikeFree In your phone's Bluetooth settings and the bike's app, remove the bike, then pair it again.
3Ask a Bafang dealer to read the faultShop job Bafang dealers have a diagnostic tool that reads detailed fault data and can update firmware. It often pins down internal faults quickly.

Parts you might need

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Only buy a part if the free steps didn't fix it. Always match the voltage and connector type to your bike.

Replacement display
Must be compatible with your controller and its protocol, not just the same plug.
Link coming soon

Still not fixed?

Pages to try next:

All Bafang E170 / E180 / E181 codes

When it's time for a shop: if you've worked through every step and the problem is still there, take the bike to an e-bike shop. Bring your notes on when it happens, plus the code.