The PCM needs to be reprogrammed at a Ford dealer. There is a technical service bulletin for these codes. 04-17-12 is the number for the bulletin.
Some Taurus/Sable vehicles equipped with a 3.0L FFV engine may exhibit a malfunction indicator lamp (MIL) illuminated and diagnostic trouble codes (DTCs) P0172/P0175, with no driveability conditions present.
To service, reprogram the powertrain control module (PCM) to the latest calibration using WDS release B32.8 or higher. Calibration files may also be obtained at www.motorcraft.com. Do not replace the MAF, HEGO or PCM for this condition.
Eligible Under Provisions Of New Vehicle Limited Warranty Coverage And Emissions Warranty Coverage
Ford Technician
Ford Senior Master,Ase Master with Advanced Level,25 year Ford Tech, Auto Trans and Drivability,Etc