2002 Chevrolet Tahoe Q&A

2002 Chevrolet Tahoe Question: Codes P0171 & P0174

Answer 1
What engine????? -
Comment 1
4.8 -
Comment 2
First suspect is vacuum leak at intake manifold. Not the only possibility though. Prob. need to get a mechanic to check it out. -
Comment 3
I work part time at a shop. can it be check with carb spray -
Comment 4
Cool, now we can talk motors! Yes that will work, check all the other stuff also like MAF may need cleaning, upstream O2's Use a scanner, you will find it! -
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