how to fix m1 brake error 1505

The M1 Brake Error 1505 typically refers to an issue with an electric scooter or bicycle equipped with an M1 brake system. This error code may indicate a problem with the brake sensor, wiring, or the brake lever. Here are steps to diagnose and potentially fix this issue:

Materials You’ll Need:

  • Basic hand tools
  • Replacement brake sensor or parts (if needed)


  1. Safety First:
    • Ensure that the scooter or bicycle is turned off and in a safe, stable position before beginning any work.
  2. Inspect Brake Lever and Cable:
    • Start by visually inspecting the brake lever and the brake cable. Check for any visible damage, such as frayed cables, loose connections, or a damaged brake lever.
  3. Check Brake Sensor Connection:
    • Locate the brake sensor on your electric scooter or bicycle. It’s typically a small device attached to the brake lever or cable. Ensure that the sensor is securely connected to the wiring harness.
  4. Inspect Wiring:
    • Examine the wiring from the brake sensor to the main control unit of the scooter or bicycle. Look for any signs of damage, such as exposed wires or cuts. If you find any damaged wiring, it may need to be repaired or replaced.
  5. Test the Brake Lever:
    • Squeeze and release the brake lever a few times while observing the brake sensor and its response. Ensure that the brake lever is activating the sensor as it should. If the sensor doesn’t respond when the brake lever is engaged, it may be faulty.
  6. Check Magnet Alignment (if applicable):
    • Some brake sensors work in conjunction with a small magnet. Ensure that the magnet is aligned correctly with the sensor. If it’s misaligned, it may not trigger the sensor properly.
  7. Clean and Lubricate:
    • Sometimes, debris or dirt buildup can affect the operation of the brake sensor. Clean the sensor and surrounding area to ensure there are no obstructions. Additionally, you can apply a small amount of lubricant to the moving parts of the brake lever and sensor to ensure smooth operation.
  8. Reset the System:
    • Some electric scooters or bicycles have a reset function to clear error codes. Consult your scooter or bicycle’s user manual for instructions on how to perform a system reset.
  9. Replace Faulty Components:
    • If you’ve determined that the brake sensor is faulty or damaged, you may need to replace it with a new one. Contact the manufacturer or a reputable parts supplier to obtain the correct replacement sensor. Follow the manufacturer’s instructions for installation.
  10. Reassemble and Test:
    • After making any necessary repairs or replacements, reassemble the brake components and ensure that all connections are secure. Test the brake system to confirm that the error code has been resolved.
  11. Professional Assistance:
    • If you’re unable to diagnose or fix the M1 Brake Error 1505 on your own, or if the issue persists after attempting the above steps, it’s advisable to seek professional assistance from a qualified electric scooter or bicycle technician. They have the expertise and specialized tools to diagnose and repair complex electrical and brake system issues.

Always prioritize safety when working on electric scooters or bicycles. If you’re unsure about any aspect of the repair process or if the issue remains unresolved, consult the manufacturer’s support or a professional technician for further assistance.

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