850C (Bafang) code list · 850C Display

Error 13 on 850C Display

What it means + how to fix it From the manual

Quick answer

Error 13 on the 850C means “Battery's temperature sensor error.” Most likely cause: a very hot or cold battery, dirty battery contacts, or a battery fault. Try this first: bring the battery to room temperature.

Try this first

Free, and each takes under 5 minutes.

Bring the battery to room temperature
Turn it off and on again
Reseat the battery

In plain English

The battery's temperature sensor isn't reporting correctly. Bring the battery to room temperature and reseat it. If the code stays, the battery needs a shop check.

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.

1Bring the battery to room temperatureFree If the bike has been in hot sun or freezing cold, bring the battery indoors for an hour, then try again.
2Turn it off and on againFree Switch the display off, wait 30 seconds, then switch it back on. If the code clears, note what you were doing when it appeared, in case it comes back.
3Reseat the batteryFree Switch off and slide or lift the battery out of its mount. Wipe any dirt off the metal contacts on the battery and the mount, then put it back until it clicks and locks.
4Have the battery testedShop job A shop can test the battery and its protection circuit and tell you if it needs replacing. Never open the battery pack yourself.

Parts you might need

As an Amazon Associate I earn from qualifying purchases. These links go straight to Amazon.

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

Replacement e-bike battery
Only if a shop confirms your battery is worn out or faulty. Must match voltage, mount and connector.
Link coming soon
Electrical contact cleaner spray
Cleans dirt and corrosion from connector pins and battery contacts.
Link coming soon

Still not fixed?

Pages to try next:

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 and your error history.