I have a 25 000 miles A4. The car appears to be sluggish, it appears as there is no boost from the turbo. Also, transmission (tiptronic) vent into default shifting, prompting the reverse gear to engage very violently, it almost looked as it would rip the tranny off. When reseting, there were no engine codes it only had tranny neutral switch fault code. When reset, it does not come on any longer, yet the car still is sluggish. Heard about adjusting the turbo (increasing the boost to what psi) or any other suggestions?
PLEASE HELP