Aventon error 09: Motor phase error
Aventon e-bikes with Bafang hub motor (Pace, Level, Aventure, Sinch, Soltera) and Aventon colour or LCD displayDealer neededDo not keep riding
A fault on a motor phase wire: open, short or unbalanced current. The motor clicks, cogs or is dead; sometimes a burnt smell. Stop using assist.
| Drive system | Aventon e-bikes with Bafang hub motor (Pace, Level, Aventure, Sinch, Soltera) and Aventon colour or LCD display |
| Severity | Dealer needed |
| Keep riding? | Do not keep riding |
| Typical cost | Controller USD 100-180; hub motor USD 250-400. |
Likely causes
- Corroded or burnt pins in the motor connector
- Motor cable damaged at the dropout
- Burnt motor windings
- Failed controller MOSFET
How to fix Aventon error 09
- Inspect the motor connector for burnt or corroded pins
- Check the cable
- Spin the wheel unplugged and feel for cogging
- Contact Aventon support or a dealer; motor or controller replacement
Go to a dealer if: Go to a dealer immediately.
Warranty: Aventon gives a 2-year limited warranty on frame, motor, battery and electronics through its dealer network; open a ticket with Aventon support before replacing parts.
Typical cost: Controller USD 100-180; hub motor USD 250-400.
Warranty: Aventon gives a 2-year limited warranty on frame, motor, battery and electronics through its dealer network; open a ticket with Aventon support before replacing parts.
Typical cost: Controller USD 100-180; hub motor USD 250-400.
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 Aventon error 09?
No.
Can I keep riding?
No, a phase short can destroy the controller.
Warranty?
Yes, motor and controller are covered.
Related Aventon codes
Manuals and video
Not an official Aventon document. Compiled from workshop experience and public service information; details can differ per system version and bike brand.