Turn off check engine light with Va can scanner

I brought Audi A6 about two thirty day period in the past. Last week the?? Check out engine mild?? was on, so i took it to the garage. The technician considered I'd a bad o2 sensor. So I went to Firestone previous week and obtained some car function carried out: new air filter, brakes, drums, coolant, and so forth. But once they were completed with my motor vehicle, the look at engine light was still on .I don??t determine what??s gonging on.
Yesterday the?? look at engine light?? just disappeared. That produced me really baffled. What??s mistaken with my vehicle or it??s just perfectly? I went to the garage again, this time I locate a further technician. He explained that if the o2 sensor was examining a rich or lean burn up maybe you have experienced it mounted when you experienced do the job finished. Once the motor vehicle starting up working correctly that was no more an issue and so the light disappear, however the vehicle laptop or computer is still storing the code .The technician indicates that I should use a vag diagnostic tool to go through and erase the fault code.
Which vag diagnostic tool is best? In personalized, I just need a code reader which might browse and clear my Audi fault codes .The technician advised Va can scanner to me .Va can scan diagnostic instrument which outlets a database of greater than 14000 fault-codes is completely suitable with all VW, Audi, Seat and Skoda designs.