MK5 Golf GTI, Code p0171: system too lean bank 1. Code came on after I had the intake manifold off and back on. : r/Cartalk
P0171 System Too Lean | GOLFMKV.com - VW GTI Forum / VW Rabbit Forum / VW R32 Forum / VW Golf Forum
P0171, P2187 and P2279...OR...How A Vacuum Leak Has Me Losing My Mind! | VW GTI MKVI Forum / VW Golf R Forum / VW Golf MKVI Forum / VW GTI Forum - Golfmk6.com
VW and AUDI Engine code P0171 P0174 P1136 and P1138 air leak test - YouTube