Sensor error GoPro Karma

[Ejub]

I have crashed karma and broke front left arm. I have replaced arm and propellers. When i start karma take off land i receive Sensor error and immediately landing. What sensor is error?

 

[Ejub]

I sloved case.
Left back arm make problem.
On right side see picture little piece who press sensor for control arm. I heat it up and press back to normal position. Now its full functional.