Trouble with my wife's A6. I put the Vag-Com and pulled the following code
16721 Crankshaft position sensor (G28) 0r (G4) signal too low PO337-92-00 Unknown Error Ellaboration. I went on A6 forum and found nothing on what to look for to fix problem. Help

You didn't post what kind of engine you have...or year.

Is the car running bad or did you just pull these codes? If the second, just clear them and see if they come back.

Sorry, but I don't have an A6 manual.