Bafang error 14: Motor over temperature
Bafang BBS01/BBS02/BBSHD, M-series mid-drives and hub motors (UART & CAN displays)WarningRide with caution
The motor's internal temperature sensor reports overheating, so the controller cuts or limits power to protect the windings and magnets. Riders see this after long climbs, heavy cargo or off-road use at low speed. It clears once the motor cools.
Likely causes
- Long steep climbs at low cadence (mid-drive in a high gear)
- Heavy load, trailer or cargo at low speed on a hub motor
- Hot ambient temperature
- Current limit raised above the motor's rating
- Motor sensor drifting after an earlier overheat
How to fix Bafang error 14
- Stop and let the motor cool 15-20 minutes, then power cycle
- Use lower gears and keep cadence up so the motor spins faster and pulls less current
- Avoid full throttle from standstill with heavy loads on hub motors
- Lower the current limit if you have raised it
- If it trips in mild riding, have the motor's sensor and windings checked
Go to a dealer if: Go to a shop if the motor overheats on easy rides or the code no longer clears after cooling.
Warranty: If the bike or kit is under warranty (usually 1-2 years via the seller), contact them before opening anything, as opened motors and controllers can void the claim.
Typical cost: Usually free; a motor temperature sensor or stator repair is EUR/USD 60-250.
Warranty: If the bike or kit is under warranty (usually 1-2 years via the seller), contact them before opening anything, as opened motors and controllers can void the claim.
Typical cost: Usually free; a motor temperature sensor or stator repair is EUR/USD 60-250.
Still stuck? Take a photo of the display and show it to a local e-bike workshop. Bring the bike's system name (e.g. Bosch Performance Line CX) and the exact code; that saves diagnostic time and money.
Frequently asked
Can I reset error 14?
It clears itself after cooling. Power cycle if the display keeps showing it.
Can I keep riding with error 14?
Yes once cooled, but change your riding style. Repeated overheating demagnetises the motor over time.
Warranty?
Normal use yes; raised current limits or towing beyond the rated load are usually excluded.
Related Bafang codes
Not an official Bafang document. Compiled from workshop experience and public service information; details can differ per system version and bike brand.