ODB Codes P0102, P1139, P1137 Come Up

P0102 - Mass or Volume Air Flow Circuit Low Input

P1137 - Long term Fuel Trim Add Fuel Bank 1 System Too Rich

P1139 - Long Term Fuel Trim Add Fuel Bank 2 System Too Rich

Trying To Figure Out if i still need a diagnostic check to found out more or could i jus go from there with the info tha i have????? need help if any body could please help

 

All three could be caused by a bad MAF. what year/model/engine do you have?

 

2000 A6 Ouattro Turbo V6
Engine: APB-2.7T
that the engine