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 there is no error code displayed.
Use this article if your bike:
powers on normally
the throttle works but pedal assist does not
pedal assist works intermittently
walk mode works but pedal assist does not
there is no error code shown on the display
This article applies to Aventon e-bikes equipped with either:
a cadence sensor
or a torque sensor
Stop troubleshooting and contact support if anything appears unsafe or damaged.
Before You Start
Please prepare the following:
order number or proof of purchase
Aventon model
photo or video of the issue
confirmation of whether the bike powers on
confirmation of whether throttle function works
confirmation of whether walk mode works
confirmation of whether the display turns on
confirmation of when the issue first appeared
confirmation of whether the issue occurred after riding, transport, storage, impact, water exposure, modification, or third-party repair
photos of visible damage, if any
Safety Warnings
Do not continue riding if the bike loses power unexpectedly.
Do not open sealed electrical components.
Do not work on wiring while the bike is powered on or charging.
Do not force connectors.
Stop and contact support if you are unsure.
What This Issue Means
If pedal assist is not functioning and no error code is present, the issue may be related to:
a loose connection
a damaged sensor
damaged wiring
the controller
the wiring harness
a cadence sensor or torque sensor issue
Depending on the Aventon model, your bike may use:
a cadence sensor
or a torque sensor
Cadence sensors detect crank rotation.
Torque sensors adjust motor support based on rider pedal input.
Possible Causes
Possible causes may include:
loose connection
dirt or grit inside a connector
damaged cable
damaged harness
damaged cadence sensor
damaged torque sensor
damaged controller
visible impact damage
water exposure
Troubleshooting Steps
Step 1 – Confirm the Bike Powers On Normally
Power the bike on and confirm the display operates normally.
If yes
Continue to Step 2.
If no
Refer to the “Bike Will Not Power On” troubleshooting article before continuing.
If the issue clears
Continue monitoring the bike.
If the issue remains
Continue to Step 2.
Step 2 – Check for Visible Damage
Inspect visible cables, connectors, and wiring around:
the crank area
the motor area
the display
the harness connections
Check for:
loose plugs
dirt or grit
cuts or frayed cables
impact damage
water exposure
Reconnect any loose accessible connectors and retest the bike.
If yes
If damage is visible, please contact our support team with the photos/videos listed below so we can review the next step.
If no
Continue to Step 3.
If the issue clears
The issue was likely caused by a loose or contaminated connection.
If the issue remains
Continue to Step 3.
Step 3 – Check Whether the Bike Uses a Cadence Sensor or Torque Sensor
Different Aventon models use different pedal assist systems.
If yes
If you know your bike uses a cadence sensor, continue to Step 4.
If your bike uses a torque sensor, continue to Step 7.
If no
Please contact support with your Aventon model information before continuing.
If the issue clears
Continue monitoring the bike.
If the issue remains
Continue to the correct sensor troubleshooting section below.
Cadence Sensor Troubleshooting
Step 4 – Inspect the Cadence Sensor Area
Inspect the cadence sensor area near the crank on the non-drive side of the bike.
Confirm:
the sensor appears secure
the sensor has not shifted
the sensor is not rotating
there is no visible damage
Disconnect and reconnect any accessible cadence sensor connection if safe to do so.
Retest the bike.
If yes
If pedal assist now functions correctly, the issue was likely caused by a loose connection.
If no
Continue to Step 5.
If the issue clears
Continue monitoring the bike.
If the issue remains
Continue to Step 5.
Step 5 – Check Whether Walk Mode Works
Test whether walk mode functions normally.
If yes
The cadence sensor may not be functioning correctly.
Please contact our support team with the photos/videos listed below so we can review the next step.
If no
Continue to Step 6.
If the issue clears
Continue monitoring the bike.
If the issue remains
Continue to Step 6.
Step 6 – Check Whether Both PAS and Throttle Are Not Functioning
Test whether both pedal assist and throttle are non-functional.
If yes
The issue may involve the controller or related wiring.
Please contact our support team with the photos/videos listed below so we can review the next step.
If no
Please contact support for further assistance.
If the issue clears
Continue monitoring the bike.
If the issue remains
Contact support.
Torque Sensor Troubleshooting
Step 7 – Inspect Torque Sensor Connections
Inspect accessible wiring and connectors related to the torque sensor and motor area.
Confirm connectors are:
secure
clean
free from dirt or grit
free from visible damage
Reconnect any loose accessible connectors and retest the bike.
If yes
If pedal assist now functions correctly, the issue was likely caused by a loose connection.
If no
Continue to Step 8.
If the issue clears
Continue monitoring the bike.
If the issue remains
Continue to Step 8.
Step 8 – Perform a Torque Sensor Reset Procedure
If walk mode still functions, perform the following reset process:
Put the bike into ECO mode.
Hold the down arrow button for 2 seconds to activate walk mode.
Allow the bike to assist itself for approximately 30 feet.
Return the bike to ECO mode.
Cycle through all pedal assist levels.
Retest pedal assist function.
If yes
If pedal assist now functions correctly, the issue may have been related to torque sensor calibration.
Continue monitoring the bike.
If no
Continue to Step 9.
If the issue clears
Continue monitoring the bike.
If the issue remains
Continue to Step 9.
Step 9 – Check Whether Walk Mode Still Functions
Test whether walk mode still operates normally.
If yes
The torque sensor may require further inspection.
Please contact our support team with the photos/videos listed below so we can review the next step.
If no
Continue to Step 10.
If the issue clears
Continue monitoring the bike.
If the issue remains
Continue to Step 10.
Step 10 – Check Whether Both PAS and Throttle Are Not Functioning
Test whether both pedal assist and throttle are non-functional.
If yes
The issue may involve the controller or related wiring.
Please contact our support team with the photos/videos listed below so we can review the next step.
If no
Please contact support for further assistance.
If the issue clears
Continue monitoring the bike.
If the issue remains
Contact support.
When To Contact Support
Please contact support if:
pedal assist still does not function after these checks
the bike has visible wiring damage
connectors appear damaged or burnt
the bike has experienced impact or water exposure
both throttle and pedal assist stop functioning
walk mode no longer functions
you are unsure how to safely complete any step
the bike has been modified or repaired by a third party
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:
order number or proof of purchase
Aventon model
photo or video showing the issue
photo of the display while powered on
confirmation of whether throttle function works
confirmation of whether walk mode works
photos of accessible wiring and connectors
photos of the crank and sensor area
photos of visible damage
confirmation of whether the issue occurred after impact, water exposure, transport, modification, or third-party repair
steps already completed from this article
Important Safety Notes
Do not continue riding if pedal assist cuts in and out unexpectedly.
Do not ride if there is visible damage, overheating, smoke, burning smell, or water exposure.
Do not open the battery, controller, motor, or sealed electrical components.
Do not force connectors or wiring.
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.