Hi Captian and pilot,

I facing a problem that my Mavic is not holding the position in the air. It keep moving down or moving to left while I not pressing anything on the controller.
Is there any solution to fix this problem?

Video or screenshot would be helpful in order to troubleshoot

As Tviscomi mentioned, it's hard to say without more information, but the most common solutions to this would be to calibrate the IMU or remote control. Also, some amount of drift is normal if VPS is disabled or ineffective (e.g., in low light conditions or when no "pattern" below the aircraft it can use to hover in place), but if it continues moving indefinitely that does imply some issue other than a lack of VPS.

Could you be in sport mode? This might explain the movements.

I agree with Droneflying could be lack of calibration or lack vps

Marty Markoe Posted at 2018-1-2 06:47
Could you be in sport mode? This might explain the movements.

Noted will check it out.
Thank you Marty

DroneFlying Posted at 2018-1-2 05:52
As Tviscomi mentioned, it's hard to say without more information, but the most common solutions to this would be to calibrate the IMU or remote control. Also, some amount of drift is normal if VPS is disabled or ineffective (e.g., in low light conditions or when no "pattern" below the aircraft it can use to hover in place), but if it continues moving indefinitely that does imply some issue other than a lack of VPS.

Noted will check on it later.
Thank you DroneFlying

Tviscomi Posted at 2018-1-2 05:47
Video or screenshot would be helpful in order to troubleshoot

Later I upload the video to show you.

How close are you flying to ground and what is you GPS status.

Locoman Posted at 2018-1-2 07:07
How close are you flying to ground and what is you GPS status.

It about 1m between myself and the mavic. for the GPS signal is good.

Below 13m AGL Id say you need to calibrate the sensors in Assistant 2 (and the IMU and RC to be safe as others have advised). If flying higher when this happens it could be down to GPS or simply heavy wind gusts overpowering the motors are causing minor drift.

Just to verify, did you fly the drone in a place with No GPS signal? If the drone doesn't hover stably, please refer to the info below:
1. Check if the propellers are damaged, change it if necessary;
2. Fly in P mode with good GPS environment, avoid flying when there is a strong wind and much interference around;
3. Calibrate the IMU and compass, if possible, also calibrate the VPS system;
See if it helps. If the drone has an impact damage or crash incident before, please send it back for an overall check. Thank you.