After not being able to scan the audi tt for years I have finally found how to fix the problem. This is a problem that a lot of people have and there isn't much information on this online. After finding the k line we can disconnect them all at one point to check them all separately. This is something that i couldn't find the answer to so hopefully it helps someone else out.
#ModdingAddiction #DIY
Audi OBDII Port Not Working FIXED!!!
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modding addictionmoddingaddictionAUDITTQUARTROKLINEK-LINEK LINEOBDOBDIIOBD2COMMUNICATIONS ERRORunable to connecthow toground12 vtroubleshootings4a4a6stuck k linecannot conncet code readercode readergroundedno voltageaftermarket radiok-line stuck highk-line stuck lowstuck lowstuck high12 voltsross-techross techaftermarket radio problemsobd port not workingobd scanner not connectingobd2 port not workingobd2obd 2obd