Sm-g960f read codes failed

Reading Codes Online...
Checking modem version.
Restarting phone.
Waiting for ADB connection. Be patient! Do NOT disconnect the phone!
Reading data. Be patient! Do NOT disconnect the phone!
Read codes failed.
Finished at local time: [08.03.18 19:20:50]
WorkID: 41855444




SM-G960F - WHY HAVE CODES FAILED