Downward Vision System Error
DJI Drone
Severity: ModerateWhat Does This Error Mean?
Downward Vision System Error means the cameras on the bottom of the drone that allow indoor hovering have a fault. Without this system, the drone cannot hold position indoors or at low altitude without GPS. Cleaning the sensors and restarting the drone fixes most cases.
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
- Downward vision sensors dirty or obscured
- Flying over a uniform surface (water, sand, plain white floor) that sensors cannot read
- Sensor lens scratched from a landing
- Low light conditions below the drone
- Firmware issue affecting downward sensor processing
How to Fix It
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Power off and clean the two downward-facing sensor windows on the drone's belly.
These are small circular lenses on the underside. Clean with a microfiber cloth and lens cleaner.
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Ensure there is adequate texture and light below the drone.
Downward vision needs a patterned surface and enough light to work. Plain white carpet and dark rooms both cause errors.
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Restart the drone and check if the error clears.
Many sensor errors are temporary and clear after a restart.
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Check for firmware updates in the DJI Fly app.
Some downward vision errors are firmware-related and have been fixed in subsequent updates.
When to Call a Professional
Cleaning the sensors resolves most downward vision errors. If sensors are scratched or the error persists in good conditions, DJI repair may be needed. Sensor replacement is available at DJI service centers.
Frequently Asked Questions
Can I fly indoors without the downward vision system?
Yes, but it is risky. Without downward vision, the drone will drift laterally indoors (no GPS, no vision = no position hold). Only fly indoors without vision positioning if you are an experienced pilot and the area is obstacle-free.
Why does the drone drift when flying over water?
Water is a uniform, reflective surface that the downward vision sensors cannot interpret. The sensors see a constantly changing pattern in the water reflections, causing position hold to fail. Fly over water using GPS mode (above 10m altitude) where GPS position hold takes over.
Does the Downward Vision System use the same sensors as obstacle avoidance?
No — they are different sensor systems. Downward vision sensors face straight down for position holding. Obstacle avoidance sensors face forward, backward, and sideways to detect obstacles. Each can fail independently.