i do not know what an ECU tune is to answer your question... sorry on that.

also i was watching the screen at the emissions testing center and that was the message displayed.....sensors not commuicating....rejected...

the obd ii i used was about an hour later when i got back home.....several miles and stops later......

question: if it is communicating with my tester does that mean it will communicate with the emissions station tester or are they looking for different data?

thanks for the help...