I eventually got my hands on a can of compressed air and blew out the ultrasonic sensors and thankfully that has fixed the issue.
They didn't look in the slightest bit dirty but they must be very sensitive.
Hopefully this might help someone else in the future...
Hi guys,
Sorry for resurrecting an old thread but my Mavic Pro just started having a similar issue.
On the Controller it shows an error "Downward Sensor Error" and then slowly gains altitude.
If I attempt to go lower the drone then goes into an automated landing mode.
I have calibrated the...
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