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Why I am receiving this message with couple DTC communication errors ?U? every time i flash with an updated tune?
I?ve made 20+ flashes previously with no SES light , as for the last 3-4 flashes i receiving this ?
already done the VATS delete process for the GenV , unless there is something additional for those global B 🤔
please can someone advise?
Modules constantly send "State of Health" messages back and forth to give an indication of communication issues. When you flash the ECM/PCM or for that matter almost any module you can get false "U" codes and the module you are programming does not answer state of health requests. Just delete the codes in ALL modules and then see if any return after the clear.