Ford should know this one, this is a Tech bulliten from them:
WRENCH LIGHT ON WITH BOTH DTC P2106 AND P2135 - VEHICLES BUILT 11/29/2004 AND PRIOR
TECHNICAL SERVICE BULLETIN
Reference Number(s): 05-14-4, Date of Issue: July 25, 2005
FORD: 2003-2005 Thunderbird; 2005 Crown Victoria, Mustang; 2004-2005 Explorer, F-150; 2005 E-Series, Expedition, F-Super Duty LINCOLN:2003-2005 LS; 2005 Town Car, Navigator MERCURY:2005 Grand Marquis; 2004-2005 Mountaineer
Replace the throttle position sensor (TPS) following the instruction sheet included in the TPS service kit. Reprogram the powertrain control module (PCM) to the latest calibration using WDS release B36.11 and higher, or B37.2 and higher. This new calibration is not included in the B37 CD. Calibration files are also available at www. Motorcraft. Com
Please let us know what you find so it will help others.
Wednesday, November 30th, 2016 AT 9:31 AM