Seen this before on drive by wire throttle bodies..Vehicle should be covered under either the 3/36 bumper to bumper or 5/50 emission warranty. The mass air flow sensor must see a minimum cfm of air before allowing the vehicle to start, should be a easy fix. But only Ford or large fleets will have a IDS to re-flash the car.
The worst-case scenario would be one of the 20+ modules (computers) refuses to wake up when the key is turned on. That still would require an IDS and lot of time to locate which module in the communication area network is at fault.
Engine Controls - MIL ON/DTC's P0505/P0506/Hard Start
Notes
TSB 08-18-2
09/15/08
MIL ON - P0506 AND/OR P0505 - HESITATION/LOSS
OF RPM/DIFFICULTY STARTING/LOW IDLE RPM
FORD:
2005-2007 Crown Victoria
2006 Mustang, Mustang
2004-2006 F-150, F-150
2005-2006 E-350, E-450, F-Super Duty
2006 F-53 Motorhome Chassis
2006-2007 Explorer Sport Trac, Explorer
LINCOLN:
2005-2007 Town Car
2006 Mark LT
MERCURY:
2005-2007 Grand Marquis
2006-2007 Mountaineer, Mountaineer
This article supersedes TSB(s) 08-5-13, 07-23-12 and 06-25-8 to update the Service Procedure.
ISSUE
Some 2004-2006 4.6L and 5.4L F-150 (excluding F-150 Heritage), 2006 5.4L Mark LT, 2005-2006 6.8L E-350 / E-450, 2005-2006 6.8L F-Super Duty (F-250 to F-550), 2006 6.8L F-53 Motorhome Chassis, 2006-2007 4.0L Explorer 4 dr, 2007 4.0L Explorer Sport Trac, 2006-2007 4.0L Mountaineer, 2006 4.0L Mustang, 2006 - 2007 4.6L 3V Explorer / Explorer Sport Trac / Mountaineer, 2006 4.6L 3V Mustang, and 2005-2007 Crown Vic / Grand Marquis / Towncar vehicles may exhibit one or more of the following symptoms: drive-away hesitation, loss of RPM on deceleration, difficulty starting, and/or idle RPM less than desired. Malfunction indicator lamp (MIL) may be illuminated with diagnostic trouble codes (DTCs) P0506 and/or P0505. These conditions may appear after battery disconnect, dead battery condition, or keep alive memory (KAM) reset. The symptoms may be due to engine deposits in the throttle leading to air[low less than desired.
ACTION
Follow the Service Procedure steps to correct the condition.
SERVICE PROCEDURE
1. Reprogram the powertrain control module (PCM) to the latest calibration using IDS release 53.9 and higher or 54.1 and higher. This new calibration is not included in the VCM 2008.1 DVD. Calibration files may also be obtained at the website. The calibration contains a sludge compensation strategy for the throttle body.