Volkswagen Passat B5 Discussion
Hello all, 03 B5 1.8t AWM. 160K
Was throwing codes P0299,P0420,P0171
I replaced the bad original diverter valve and no longer get P0171. Car feels much stronger after. Cleaned MAF also. Boost leak tested ok. Vac leak tested ok.
Still getting P0299 only when accelerating hard, usually...