Ive been told a may have a faulty MAF ,although i have power,i dont have economy. A4 tid 130 (awx engine) only does 24.6 m.p.g !!!! ive replaced temp sensor,ive heard a fault maf will give wrong readings (although will still work) How can i check the readings via vag-com? and what are good readings and what are bad? Unless theres another reason its heavy on diesel! 16.00 pounds it used,it did 94.6 miles town driving @ 91.9 pence per litre.