Aventon Mid Drive – W09 Current Software Not Up to Date TroubleshootingUpdated 2 days ago
This article explains how to troubleshoot the W09 Current Software Not Up to Date error on Aventon mid drive eBikes.
Use this article if your bike:
shows a W09 error code
cannot complete app functions correctly
displays a software or firmware warning
has connection issues with the Aventon app
If you are unsure about any step or anything looks unsafe, stop and contact support before continuing.
Before You Start
Please prepare the following before troubleshooting:
your order number
your Aventon model
a photo or video of the W09 error code
a screenshot of the Aventon app version, if possible
when the issue first appeared
confirmation of whether the bike powers on
confirmation of whether the display turns on
confirmation of whether the bike connects to the Aventon app
confirmation of whether the issue started after an app update, firmware update, transport, storage, water exposure, impact, modification, or third-party repair
photos of any visible damage
Safety Warnings
Do not continue riding if the bike has a persistent error code.
Do not attempt firmware updates if the bike or battery has visible damage.
Do not open sealed electrical components.
Do not work on wiring while the bike is powered on or charging.
Stop and contact support if you are unsure about any step.
What This Error Means
The W09 error means the current software is not up to date.
The bike may require an updated version of the Aventon app or updated electrical firmware.
Possible Causes
Possible causes include:
the Aventon app is not updated to the latest version
the bike firmware is not updated to the latest version
Troubleshooting Steps
Step 1 – Update the Aventon App
Check whether the Aventon app is updated to the latest version on your mobile device.
If an update is available:
install the latest version of the Aventon app
fully close and reopen the app after updating
If yes
If the app is now updated:
continue to Step 2
If no
If you cannot update the app:
contact support
If the issue clears
The issue was likely caused by an outdated app version.
Continue monitoring the bike and app connection.
If the issue remains
Continue to Step 2.
Step 2 – Reconnect the eBike to the Aventon App
Open the Aventon app and reconnect your eBike.
Check whether:
the bike appears correctly in the app
the app maintains connection
the W09 error clears after reconnecting
If yes
If the W09 error clears:
continue using the bike normally
monitor the bike and app connection
If no
If the W09 error remains:
continue to Step 3
If the issue clears
The issue was likely caused by an app connection or software communication issue.
Continue monitoring the bike.
If the issue remains
Continue to Step 3.
Step 3 – Update the eBike Firmware
Using the Aventon app, check whether electrical firmware updates are available for the eBike.
If updates are available:
update all available electrical firmware to the latest version using the Aventon app
keep the bike powered on during the update process
do not disconnect the app during updates
After the update is complete:
restart the bike
reconnect to the Aventon app
check whether the W09 error remains
If yes
If the W09 error clears after updating:
continue monitoring the bike and app connection
If no
If the W09 error remains after updating:
please contact our support team with the photos and videos listed below so we can review the next step
If the issue clears
The issue was likely caused by outdated firmware or software communication.
Continue monitoring the bike.
If the issue remains
Please contact support.
When To Contact Support
Please contact support if:
the W09 error remains after completing the steps above
the bike cannot connect to the Aventon app
the firmware update cannot complete
the bike does not power on
the display does not turn on
there is visible damage
the issue started after water exposure, transport damage, impact, crash, modification, or third-party repair
you are unsure how to safely complete any step
If the issue remains after this step, please contact our support team and include the photos/videos listed below.
What To Send Support
Please send the following:
your order number
your Aventon model
a photo or video of the W09 error code
screenshots of the Aventon app
confirmation of the app version installed
confirmation of whether firmware updates were attempted
a photo of the display
photos of any visible damage
confirmation of whether the bike powers on
confirmation of whether the display turns on
confirmation of whether the bike connects to the Aventon app
confirmation of whether the issue started after an update, transport, storage, water exposure, impact, crash, modification, or third-party repair
confirmation of which troubleshooting steps you have already completed
Important Safety Notes
Do not continue riding if the W09 error remains.
Do not ride the bike if there is visible damage, overheating, smoke, a burning smell, or water exposure.
Do not open the battery, controller, display, or sealed electrical components.
Do not interrupt firmware updates once they have started.
Do not work on wiring while the bike is powered on or connected to the charger.
Contact support if you are unsure about any step.