Aventon – Pedal Assist Not Functioning & No Error Code Present TroubleshootingUpdated 2 days ago
This article explains how to troubleshoot pedal assist (PAS) issues on Aventon e-bikes when no error code is shown.
Use this article if your bike:
powers on normally
has no error code
throttle works but pedal assist does not
walk mode works but pedal assist does not
pedal assist works intermittently
Before You Start
Prepare:
order number
Aventon model
photo/video of the issue
confirmation of whether throttle works
confirmation of whether walk mode works
confirmation of whether the display turns on
when the issue first appeared
whether the issue followed water exposure, crash, impact, transport, modification, or third-party repair
photos of visible damage, if any
Do not continue riding if the bike has visible damage, electrical smell, smoke, overheating, water exposure, motor resistance, or unpredictable motor behaviour.
What This Issue Means
Loss of pedal assist can be caused by a loose connection, damaged component, cadence sensor issue, torque sensor issue, harness issue, or controller issue.
Possible Causes
loose connection
dirt or damage in a connector
damaged cable
damaged cadence sensor
damaged torque sensor
damaged harness
damaged controller
Troubleshooting Steps
Step 1 – Check for Visible Damage or Loose Connections
Inspect visible cables and accessible connectors around the display, main wire harness, motor, and sensor area.
Check for:
loose plugs
dirt or grit
damaged cables
cut or frayed wiring
visible impact damage
Reconnect any loose accessible connectors, then retest the bike.
If the issue clears
The issue was likely caused by a loose or interrupted connection. Continue monitoring the bike.
If the issue remains
Continue to Step 2.
If anything looks damaged
Please contact our support team with the photos/videos listed below so we can review the next step.
Step 2 – Confirm Whether Throttle and Walk Mode Work
Test whether the throttle and walk mode still function.
If throttle and walk mode work
Continue to Step 3.
If throttle and walk mode do not work
Please contact our support team with the photos/videos listed below so we can review the next step.
Cadence Sensor Bikes
Step 3 – Check the Cadence Sensor
If your bike uses a cadence sensor, inspect the cadence sensor near the crank area.
Check whether the sensor:
is secure
is not rotating
has no visible damage
has no loose accessible connection
Reconnect the cadence sensor connection if it is accessible and safe to do so, then retest the bike.
If the issue clears
The issue was likely caused by a loose cadence sensor connection. Continue monitoring the bike.
If the issue remains
Please contact our support team with the photos/videos listed below so we can review the next step.
Torque Sensor Bikes
Step 4 – Check the Torque Sensor Connection
If your bike uses a torque sensor, inspect the accessible torque sensor connection to the wire harness or controller.
Reconnect any loose accessible connection, then retest the bike.
If the issue clears
The issue was likely caused by a loose torque sensor connection. Continue monitoring the bike.
If the issue remains
Continue to Step 5.
Step 5 – Reset the Torque Sensor
Only complete this step if throttle or walk mode is still working.
Put the bike into ECO mode.
Hold the down arrow for 2 seconds to activate walk mode.
Let the bike assist itself for about 9 metres.
Put the bike back into ECO mode.
Cycle through all pedal assist levels.
Retest pedal assist.
If the issue clears
The torque sensor reset may have restored pedal assist function. Continue monitoring the bike.
If the issue remains
Please contact our support team with the photos/videos listed below so we can review the next step.
When To Contact Support
Contact support if:
pedal assist still does not work
throttle and walk mode also do not work
there is visible damage
a cable or connector is damaged
the bike has had water exposure, crash, impact, transport damage, modification, or third-party repair
you are unsure how to safely complete a step
What To Send Support
Please send:
order number
Aventon model
photo/video of the issue
photo of the display
photos of the sensor area and accessible connectors
photos of visible damage
confirmation of whether throttle works
confirmation of whether walk mode works
confirmation of whether the display turns on
steps already completed from this article
Important Safety Notes
Do not continue riding if pedal assist cuts in or out unexpectedly.
Do not ride if there is visible damage, overheating, smoke, burning smell, water exposure, or motor resistance.
Do not open the battery, controller, motor, or sealed electrical components.
Do not force connectors.
Do not work on wiring while the bike is powered on or connected to the charger.
Contact support if unsure.