Tahoe check engine light P0171 & P0174

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!

Reply to
John
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Reply to
Shep

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.

Reply to
John

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