Code always put out largest steeringAngle

[Sasti1234]

Hello,
I tried to get the code work with the Arduino Pro Mini, but it turned the servo always to the maximum steering angle. So I put the MPU on my Arduino UNO to make the debugging a bit easier. Then I added a print command in the code that puts out the steeringAngle variable just before the servoSteering.write() command. The Code puts always -50 out. When I move the MPU a little bit the value sways for a very short time and then jump back to -50. Have anyone an idea what could be the problem?

Thanks in advance.