Check Engine- running too lean???
 

Hello all,

First timer out here. Stats:
02 A4 Grey on black
1.8T Quattro AutoManual with 63K.

I got a check engine light and scanner saying running too lean.

I googled afew things and came up with the2 possible probs,

1)vacuum lines
2)air flow sensor

Instead of going to the dealer rip off prices, can anyone help me on how I could figure out this problem on my own or the most innexpensive route????

Thank you in advance for your help