Question

I got the engine code P0171 on my 2008 Audi TT 2.0L Turbo. Hi, if anyone can tell me where to start? first, check that part

Answer 1

HI there,

Many times when you have a lean mixture code the issue is either a vacuum leak, a mass air flow sensor or the front O2 sensor.

Answer 2

P0171 AUDI - System Too Lean Bank 1
Read more: https://www.autocodes.com/p0171_audi.html