Stihl · Power Tools
This indicates a problem with the sensor signal from the motor, potentially affecting speed detection or position sensing. This could be due to a faulty sensor or lead.
Click steps to track your progress.
Check the motor lead and sensor lead connections for security and damage.
Inspect the sensor itself for any signs of physical damage or contamination.
Test the sensor lead according to the flow chart in the technical information.
If the issue persists, the motor or its associated electronics may be faulty.