DJI Motor Obstruction Detected — What It Means & How to Fix It

What Does This Error Mean?

Motor Obstruction Detected means one or more propellers cannot spin freely. The drone will not arm its motors until the obstruction is cleared. Power off the drone and inspect all propellers and motors before attempting to fly.

Affected Models

DJI Mini 3 Pro
DJI Mavic 3
DJI Air 2S
DJI Mini 4 Pro
DJI Phantom 4 Pro
DJI Avata 2

Common Causes

Grass, dirt, or debris caught in a motor or propeller hub
Propeller installed incorrectly and rubbing against the arm
Cracked propeller catching on the motor mount
Propeller guard installed and contacting the propeller
Hair, string, or foreign object wrapped around the motor shaft

How to Fix It

Power off the drone immediately.

Never attempt to spin or inspect propellers while the drone is powered on — motors can start unexpectedly.
Inspect each propeller for debris, grass, or foreign objects.

Check underneath the propeller hub and around the motor shaft. Grass and string can wrap invisibly tight.
Gently turn each motor by hand and check for grinding or resistance.

Each motor should spin smoothly with almost no resistance. Any catching or grinding indicates a problem.
Remove any foreign objects with tweezers and reinstall propellers correctly.

DJI propellers have CW and CCW markings — match them to the motor arm markings. Incorrectly installed props cause obstruction.
Power on and attempt a slow motor arm on flat ground before flying.

In the DJI Fly app, arm the motors at low throttle and listen for any abnormal sound before taking off.

When to Call a Professional

Motor Obstruction is almost always a physical object that you can remove yourself. If a motor bearing is damaged and grinds when turned by hand, DJI repair is needed. Motor replacement costs $30-$80 per motor depending on the model.

Frequently Asked Questions

Can I remove the propellers to clean the motors?

Yes — DJI propellers are designed to be removed for cleaning and replacement. Use the propeller removal tool if included, or press the center button and twist. Clean debris from the motor with a soft brush. Do not use water on the motor.

How do I prevent motor obstruction?

Always inspect the landing site before landing — avoid long grass, sand, and gravel. Use a landing pad to keep the drone elevated off grass and debris. Inspect all motors and propellers before every flight.

One motor sounds different from the others after clearing the obstruction — is it damaged?

A slight sound difference may just be a propeller that needs reseating. Remove and reinstall the propeller on that motor carefully. If the motor makes a grinding noise when spun by hand, the bearing is damaged and needs replacement.