The Electronic Speed Controller (ESC) acts as the brain of the motor, essentially functioning as its throttle, which is why the error message uses that terminology. It provides all the power to the motor. This error essentially indicates that there is no communication between the ESC and the motor.
Possible Causes
The drone's firmware is not up to date.
Defective ESC.
Faulty motor.
Troubleshooting Steps
Verify whether the drone requires a full update or a mini update.
The ESC referenced in the error might be faulty. You can try:
Checking to see if the light on the ESC is flashing. If it doesn’t show a green, red, or yellow light when powered on, it may indicate that it is defective.
Swapping it with another ESC on the drone to see if the error number changes. If it does, then the ESC is likely the issue.
Replacing the ESC.
If you’ve confirmed that the ESC is not the issue, you can replace the motor.