code po171 help?

[tdub79]

hello I have a 2000 tahoe with the servise engine soon light on with the po171 code I think that is the right code about running to lean or mass air flow can anyone help Ive tryed cleaning the screen but it dosnt help?

 

[Grebbler]

Did you clean the actual sensor wire with MAF cleaner? All the snorkel tubes tight fitting?

Lean code could be fuel pressure, bad fuel filter, weak fuel pump, intake gasket, etc