what other codes did you have ??
how much was your maf and where did you buy it?
Got mine from audi, worked out at £103 with the VAT and i gave them my old one back
Have you considered fitting a boost gauge, they are very very good for visual aid
The main codes were brake light switch (sorted now) the usual 17703 plus 17536 which is one of three things, MAF, Oxygen sensor or
Fuel injector so after speaking to Rhys tried it with the maf unpluged and seems better so went for that as a 1st step.
Did price it from Skoda £99 with vat, went direct to Bosch through work and paid less.
I am thinking of a boost gauge but it is money at the minute, so many things need funds yet I am trying to stick to a plan if that makes sense, next month I want to change my chav alloys as a 1st step plus hope to have this problem put to bed so I can move onto the next stage.