Tahoe service engine soon P0171 & P0174

May 09, 2005 1 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!



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