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I got codes PO101, PO171, and PO174 what do they mean on my 2005 Chevy Avalanche?

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I got codes PO101, PO171, and PO174 what do they mean on my 2005 Chevy Avalanche?

Vehicle: 2005 Chevy Avalanche 4.5L

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P0101 = Mass Air Flow Sensor Performance

P0171 = Fuel Trim System Bank 1

P0174 = Fuel Trim System Bank 2

All related to the air flow sensor. You should start by cleaning or replacing the sensor.

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