P0101Mass Air Flow (MAF) Sensor Circuit Low Frequency
P0137HO2S Circuit Low Voltage Bank 1 Sensor 2
P0157HO2S Circuit Low Voltage Bank 2 Sensor 2
Are you sure p1171 is not p0171? I can't seem to find 1171.
It looks like you are running lean due to a vacuum leak or something. The maf code is a big clue. P0171 is a lean bank 1. When you take it in have them look at the fuel trims and I bet they will be lean. I would check the intake gasket for any leaks. I don't think they are going after the true problem by replacing the sensors. I think the sensors are doing their job, but the dealer is not finding the cause.