Connect the tool and ensure the ignition is in the "On" or "Start" position. Relaunch the software. 2. Update the MDG 1 Firmware
Specifically, "20 Fixed" often indicates that the software has recognized the diagnostic MDG 1 (Media Diagnostic Gateway) interface, but the communication loop between the computer, the interface, and the machine’s control unit has been broken or "fixed" in an unresponsive state. Common Causes
STIHL’s proprietary software allows technicians to connect to M-Tronic (electronic engine management) and electric-drive tools. It provides real-time data on: Maximum and idle RPM histories. Total operating hours. Number of starts. Calibration data for fuel and ignition systems. stihl diagnostic software 20 fixed
Many technicians find that simply restarting the connection solves the problem. Close the SDS software. Disconnect the MDG 1 from the PC and the machine. Reconnect the MDG 1 to the PC first.
If the error persists, navigate to your computer's . Find the STIHL Diagnostic Interface under "Ports" or "Universal Serial Bus controllers." Uninstall the driver, unplug the device, and plug it back in to allow Windows to fetch the latest driver from the STIHL software directory. Staying Up to Date Connect the tool and ensure the ignition is
STIHL tools often require a specific "handshake" order (connecting the tool, turning on the ignition, then launching the software).
In the context of STIHL diagnostic tools, an error code—especially one labeled "Fixed"—usually refers to a or a hardware recognition failure . Update the MDG 1 Firmware Specifically, "20 Fixed"
Are you seeing this error on a , or does it happen with every tool you connect?
By following these troubleshooting steps, you can turn your diagnostic tool back into the asset it’s meant to be, ensuring your STIHL equipment stays fine-tuned and ready for the job site.