2001 Pontiac Aztek Q&A

2001 Pontiac Aztek Question: what would cause codes p0171 and code 404 on my pontiac aztek

after changing the acm sensor,gas cap, and purge valve,also changed the plugs and wires -
Answer 1
Code p0171 is usually caused by a vacuum leak somewhere on bank 1. Check gaskets, seals, and especially vacuum hoses for damage to cause this problem. -