Tahoe service engine soon 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!

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tamiejohn
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Intake manifold gasket was the problem.

Reply to
tamiejohn

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