If your Riding’Times GT73 has ever flashed an error code on the display, you know that sinking feeling. The bike is trying to tell you something, but unless you speak "electric motorbike," it can be hard to know what to do next.

Here's the good news: most of these codes point to a small set of issues, and many can be diagnosed with a few simple checks. This guide walks you through the five most common GT73 error codes—E06, E07, E08, E10, and E11—so you can figure out what's happening and whether you need to pick up a tool or contact support.

A Quick Word Before You Start Fixing Your GT73 Error Codes

Before inspecting, disconnecting, or reconnecting any wires, power off the bike and remove the battery. Only restore power when a troubleshooting step specifically instructs you to do so, and keep your hands clear of exposed electrical connections.

GT73 Error Code E06 - Undervoltage Protection

Meaning: The battery voltage has dropped below the controller's minimum operating threshold. Think of it as the bike's low-fuel warning.

Common Causes

1. Low Battery: The most straightforward reason. The battery charge is simply too low to run the bike.
2. Defective Battery: If the battery is charged but still triggers this error, the battery cells may be unable to deliver the required power.

What to Check

• Charge the Battery: Plug it in and let it reach a full charge. If the error clears, your only issue was a low battery.
• Test with a Multimeter: If you have a multimeter, a fully charged 48V battery should read around 54.6V (the official charger output). If it doesn't, the battery may be the culprit.
• Battery Replacement: If the battery fails to hold a charge or doesn't meet the correct voltage, it may need to be replaced.

GT73 Error Code E07 - Motor Hall Sensor Fault

Meaning: The controller isn't receiving the proper signal from the motor's Hall sensors. These sensors help the controller "know" the motor's position so it can apply power smoothly. This is one of the most frustrating errors because the bike may work for a minute or two before shutting down.

Common Causes

1. Wiring Damage: The motor cable insulation is cut, worn, or otherwise damaged.
2. Loose Connection: The Hall sensor connector between the controller and motor is loose or disconnected.
3. Internal Sensor Damage: The Hall sensors inside the motor are faulty.

What to Check

• Inspect the Motor Cable: Follow the cable from the motor to the controller and look for any visible damage like cuts, scrapes, or missing insulation. Pay special attention to areas where the cable might rub against the frame or near folding points.
• Check the Hall Connector: This connector is often located beneath the seat or within the main controller compartment near the bottom bracket. Ensure it is fully seated and not loose.
• Inspect the Pins: Disconnect the Hall connector and check for bent, misaligned, or corroded pins. Reconnect it securely.
• Power Cycle: After checking connections, power the bike back on. The error code should clear if the problem was a loose connection. If the bike runs for a few minutes and then shuts down again, the issue may be internal to the motor or related to the controller warming up.

GT73 Error Code E08 - Motor Phase-Wire Short Circuit or Controller MOSFET Fault

Meaning: There's a short circuit in the thick phase wires that deliver power to the motor, or the controller's power components (MOSFETs) have failed.

Common Causes

1. Short Circuit: The three thick phase wires (usually yellow, green, and blue) are touching each other or the frame.
2. Controller Failure: An internal component in the controller has failed.

What to Check

• Inspect Phase Wires: Visually inspect the motor cable for any damage.
• Disconnect the Phase Wires: Power off the bike. Disconnect the three thick phase-wire connectors between the motor and the controller.
• The Isolation Test: Power the bike back on with these wires disconnected and check the display:

• • If E08 disappears, the problem is with the motor (likely a short inside). The motor will need replacement.
  • If E08 remains on the display, the problem is with the controller, which will need to be replaced.

GT73 Error Code E10 - Display-to-Controller Communication Fault

Meaning: The display and the controller have stopped talking to each other.

Common Causes

1. Connection Issue: The communication cable between the display and controller is loose or damaged.
2. Controller Fault: An internal controller fault is preventing communication.
3. Interference: A fault in another component (like the motor or PAS sensor) is interfering with the communication bus.

What to Check

• Check the Communication Connector: Inspect the connection between the display and the controller. Reconnect it securely and test.
• Isolate the Fault: This is a step-by-step process to find the problem component:

• • Power off, disconnect the three motor phase wires, and power on. If E10 is gone, the motor is the culprit.
  • If E10 remains, power off and disconnect the pedal assist sensor (PAS) connector, then test again.

• Identify the Source:

• • If E10 persists after those disconnections, the controller and communication cable need replacing.
  • If E10 clears after a specific connector is disconnected, the component on that circuit (e.g., the PAS sensor) is the source.

GT73 E10, E08, and E09 Error Code Troubleshooting - motor phase-wire and PAS connector checks:

GT73 Error Code E11 - Throttle Fault

Meaning: The controller detects an issue with the throttle's signal.

Common Causes

1. Connection Issue: The throttle cable connector is loose.
2. Startup Issue: The throttle was held or not in its neutral position when the bike was powered on.
3. Defective Throttle: The throttle itself has failed.

What to Check

• Check the Throttle Connector: Ensure the cable connector is secure and the pins are not bent.
• Check Throttle Position: Make sure the throttle is fully returned to its neutral position before powering on. Always start the bike with your hands off the throttle.
• Throttle Replacement: If E11 remains, the throttle likely needs replacement.

When to Contact Support

If you've worked through these steps and the error code persists, or if you see smoke, sparking, or signs of overheating, a burning smell, melted connectors, or visibly damaged wiring, it's time to call in the experts. Don't ride the bike if you see these warning signs.

Support will need specific information to help you. Before contacting them, make sure you have:

• Your Original Order Number
• A Clear Photo or Video of the error and any visible damage
• A clear photo of the motor’s serial number (located on the motor casing)
  
• A photo that shows the entire handlebar area
  

The Following Replacement Parts are Available:

If troubleshooting indicates that a component may be faulty, contact Riding'times support at support@ridert.com, to confirm the diagnosis before ordering a replacement part. 

• GT73 Replacement Motor
• GT73 Replacement Controller
• GT73 Throttle
• All GT73 Parts and Accessories

Official Sources and Supporting Data

• Official FAQ error-code guide: https://www.ridingtimes.com/pages/faq
• Official GT73 E10/E08/E09 troubleshooting article: https://www.ridingtimes.com/blogs/blog/gt73-error-code-e10-e08-e09-fix

This guide is for informational purposes. Always consult your owner's manual and official support channels for the most accurate and up-to-date information.