This article explains how to troubleshoot the E44 Torque Sensor Error on an Aventon eBike.

Use this article if your bike:

• Shows an E44 error code
• Has reduced or no pedal assist
• Has inconsistent pedal assist response
• Displays a torque sensor-related warning

If you are unsure of your Aventon model, please confirm your model before continuing.

Stop troubleshooting immediately if anything looks unsafe, damaged, overheated, or smells burnt.

Before You Start

Please prepare the following:

• Order number
• Aventon model
• Photo or video of the E44 error code
• Photo of the display
• Photo of the torque sensor area, if accessible
• Photo of accessible connectors and wiring
• When the issue first appeared
• Whether the bike powers on
• Whether the display turns on
• Whether pedal assist engages
• Whether the issue happened after transport, storage, water exposure, crash, impact, modification, or third-party repair
• Photos of visible damage

Safety Warnings

• Do not continue riding if the bike has visible damage, overheating, smoke, 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.

What This Error Means

The E44 Torque Sensor Error means the bike has detected a torque sensor warning or communication issue.

This may happen if:

• The torque sensor is damaged
• The torque sensor cable is damaged
• There is a poor connection between the controller and torque sensor
• There is cable or connector damage

Possible Causes

Possible causes include:

• Torque sensor internal warning or error
• Damaged torque sensor
• Damaged torque sensor cable
• Damaged controller
• Worn cable
• Broken connector
• Internal open circuit
• Visible cable or connector damage

Troubleshooting Steps

Step 1 – Inspect the Torque Sensor and Connected Cables

Turn the bike off before continuing.

Disconnect, inspect, and clean the accessible:

• Torque sensor connection
• Torque sensor cable
• Cable connected to the torque sensor
• Cable connected to the controller for the torque sensor, if accessible

Check for:

• Loose connections
• Bent pins
• Worn cables
• Broken connectors
• Dirt or contamination
• Visible cable damage

Reconnect everything securely and restart the bike.

If yes – Visible damage is found

Continue to the relevant section below:

• Torque sensor damage
• Controller or controller cable damage

If no – No visible damage is found

Fully reconnect the:

• Torque sensor
• Torque sensor harness

Restart the bike and check whether the E44 error remains.

If the issue clears

The issue was likely caused by a loose or poor connection.

Monitor the bike during normal use.

If the issue remains

Continue to Step 2.

Step 2 – Check Whether the Error Persists After Reconnecting

After reconnecting all accessible cables and connectors, restart the bike and test pedal assist carefully.

If yes – The E44 code still appears

The issue may involve the torque sensor, wiring, or controller system.

Please contact our support team with the photos/videos listed below so we can review the next step.

If no – The error no longer appears

The issue was likely caused by a temporary connection issue.

Continue monitoring the bike during use.

Visible Damage Troubleshooting

Step 3 – Torque Sensor or Torque Sensor Cable Damage Found

Inspect the accessible torque sensor and connected cable for:

• Cuts
• Worn insulation
• Pinched cables
• Loose connectors
• Bent pins
• Broken fittings

If yes

Do not continue riding the bike.

Please contact our support team with photos of the torque sensor area and connectors.

If the issue remains

The controller system may also require further inspection.

Please contact support.

Step 4 – Controller or Controller Cable Damage Found

Inspect the accessible controller cable area for:

• Visible cable damage
• Burn marks
• Broken connectors
• Loose fittings
• Water exposure

If yes

Stop using the bike immediately.

Please contact our support team with photos of the controller area and visible damage.

If the issue remains

The torque sensor system may also require further inspection.

Please contact support.

Step 5 – Check Whether Pedal Assist Problems Continue

Check whether:

• Pedal assist does not engage
• Pedal assist cuts in and out
• The E44 error returns repeatedly
• Pedal assist response feels abnormal

If yes

The issue may involve:

• The torque sensor system
• Torque sensor communication
• The torque sensor wiring
• The controller system

Please contact our support team with:

• Video of the issue
• Video of the display during riding
• Photos of accessible connectors and wiring

If the issue remains

Please contact support.

Step 6 – Inspect for Visible Damage or Water Exposure

Inspect the accessible torque sensor and controller areas for:

• Visible damage
• Water exposure
• Loose connectors
• Damaged wiring
• Signs of impact

If yes

Stop using the bike immediately.

Please contact our support team with photos/videos of the affected area.

If no

Restart the bike and check whether the E44 error returns.

If the issue remains

The torque sensor or controller system may require further inspection.

Please contact support.

When To Contact Support

Please contact support if:

• The E44 error remains after completing these checks
• Pedal assist does not engage
• There is visible cable or connector damage
• Pedal assist behaves abnormally
• The bike has been exposed to water, crash, impact, transport damage, modification, or third-party repair
• You are unsure how to safely complete a step

If the issue remains after these steps, please contact our support team and include the photos/videos listed below.

What To Send Support

Please send:

• Order number
• Aventon model
• Photo/video of the E44 error code
• Photo of the display
• Photo/video of the torque sensor area
• Photo of accessible connectors and wiring, if safe
• Photo of the controller area, if relevant
• Photos of visible damage
• Confirmation of whether the bike powers on
• Confirmation of whether the display turns on
• Confirmation of whether pedal assist engages
• Confirmation of whether the issue happened after water exposure, crash, impact, modification, or third-party repair
• Confirmation of the troubleshooting steps already completed

Important Safety Notes

• Do not continue riding if the E44 error remains.
• Do not ride the bike if there is visible damage, overheating, smoke, burning smell, or abnormal pedal assist behaviour.
• Do not open the torque sensor, controller, 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 you are unsure.