I just bought maxicom mk808ts 3 days ago, plugged into vehicle via obd port 2 (2017 VW aw polo) and completed an automatic scan, found one code, (02 sensor) I deleted DTC and disconnected tool. Started up vechicle and fuel gauge was saying 0 fuel and 0miles remaining! The fuel before had over 1\4 full of full! What has happened! Is this common for vw polo from 2017 onwards or new tool!?