Aventon Mid Drive – W08 Motor Lock Protection TroubleshootingUpdated 3 days ago
This article explains how to troubleshoot the W08 Motor Lock Protection error on Aventon mid drive eBikes.
Use this article if your bike:
shows a W08 error code
loses motor assistance unexpectedly
feels like the rear wheel is not rotating freely
has resistance or interference while moving the rear wheel
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 W08 error code
a photo or video showing the issue
when the issue first appeared
confirmation of whether the bike powers on
confirmation of whether the battery charges
confirmation of whether the display turns on
confirmation of whether the motor engages
confirmation of whether the issue started after riding, transport, storage, water exposure, impact, crash, 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 continue riding if there is visible damage, motor resistance, smoke, overheating, or a burning smell.
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 W08 error means the bike has detected motor lock protection.
This can happen if the rear wheel cannot rotate freely due to an obstruction or interference.
Possible Causes
Possible causes include:
obstruction preventing the rear wheel from rotating freely
interference involving the tyre
interference involving the spokes
interference involving the hub
interference involving the brake
Troubleshooting Steps
Step 1 – Power Off the Bike
Turn the bike off completely before inspecting the rear wheel area.
Do not continue troubleshooting while the bike is powered on.
If yes
If the bike is fully powered off:
continue to Step 2
If no
If the bike does not power off normally:
stop troubleshooting
contact support
If the issue clears
If the error clears after restarting later:
monitor the bike during normal riding
If the issue remains
Continue to Step 2.
Step 2 – Inspect the Rear Wheel for Obstructions
Inspect the rear wheel carefully for anything preventing it from rotating freely.
Check the following areas for visible interference or obstruction:
tyre
spokes
hub
brake area
If safe to do so, slowly rotate the rear wheel by hand and check whether it moves freely.
Remove any obvious obstruction if it is safe and accessible.
Restart the bike after completing the inspection.
If yes
If you found and removed an obstruction:
restart the bike
check whether the W08 error has cleared
If no
If you cannot find an obstruction or the wheel still does not rotate freely:
continue to Step 3
If the issue clears
The issue was likely caused by an obstruction or interference preventing the rear wheel from rotating normally.
Continue monitoring the bike during normal use.
If the issue remains
Continue to Step 3.
Step 3 – Check Whether the Error Persists
Turn the bike back on and check whether the W08 error code is still displayed.
If yes
If the W08 error remains:
stop using the bike
please contact our support team with the photos and videos listed below so we can review the next step
If no
If the W08 error no longer appears:
monitor the bike during normal riding
if the error returns, contact support
If the issue clears
The issue was likely caused by temporary wheel interference or obstruction.
Continue monitoring the bike.
If the issue remains
Please contact support.
When To Contact Support
Please contact support if:
the W08 error remains after completing the steps above
the rear wheel does not rotate freely
there is visible damage
the bike does not power on
the display does not turn on
the motor does not engage
the issue appears to involve the motor, hub, brake, connector, cable, controller, or internal wiring
the bike has been exposed to water, impact, crash damage, transport damage, 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 W08 error code
a video showing the rear wheel rotating
a photo of the display
photos of the rear wheel area
photos of the tyre, spokes, hub, and brake area
photos of any visible damage
confirmation of whether the bike powers on
confirmation of whether the battery charges
confirmation of whether the display turns on
confirmation of whether the motor engages
confirmation of whether the rear wheel rotates freely
confirmation of whether the issue started after 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 W08 error remains.
Do not ride the bike if the rear wheel does not rotate freely.
Do not ride the bike if there is visible damage, overheating, smoke, a burning smell, or water exposure.
Do not open the battery, controller, motor, or sealed electrical components.
Do not force connectors or electrical components.
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.