Tahoe check engine light P0171 & P0174

May 11, 2005 2 Replies
2003 Tahoe 5.3litre 50K

The ses light is on again, dealer reccomended fuel injection cleaning for $120, done that now the problem is back. The only sympton is rough idle that is not always present.



The codes mean bank 1&2 lean - could this be MAF sensor or 02 any advice is appreciated.



thanks!



Thanks for the info...Found air leak with the intake manifold gasket. Thought they corrected the problem with the gaskets on the newer vortecs ? Guess not.

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