2005 ford expedition new throttle body installed but still having same problem with codes coming back and loosing throttle

I had same problem with my 2005 Expedition. The solution for mine turned out to be a dirty throttle body. Cleaned the inside of it with rag and carb. cleaner so that the throttle plate wouldn't bind and no more problem.

replace the throttle body. you can be dissatisfied, but its going to happen to any make or model. vehicles are made to break. if they werent then there would be no need to buy new cars

Spray the Throttle Plate with CRC Throttle Body Cleaner

If you still have problems return for more ideas,
with more detail and any codes, if lights come on the
dash in the future

Most likely the ETC Fail Safe (Electronic Throttle Control)
Various Codes for the Throttle Body will be present

Before you replace the Throttle Body because of a failed
TACM (Throttle Actuator Control Motor) Spray the throttle
inlet and plate with CRC Throttle Body Cleaner

The Failsafe can also occur from a really bad COP Ignition
Coil spiking the PCM (computer) and coming back on both
sides of the TPS Sensor. You then loose throttle plate
position and thus shut down or go only 6 mph

I would check the Throttle Actuator Control Motor on the throttle body. That is what controls the position of the throttle plate opening.

sounds like the throttle position sensor

Shown here is the P2104 obd2 code and their general meaning. For a brief description of any particular OBD2 code and how to fix the obd2 trouble code, please browsw below. P2104 Engine TP Actuator Cntl System
This obd2 code is very common on newer vehicles which contain new design of throttle positioner sensor. Instead of putting a tps sensor at the side of your throttle body as in older engines, a throttle actuator control system is installed which eliminates the mechanical linkage (cable) between the throttle body and the throttle pedal. Under the throttle pedal, a throttle switch is installed and a throttle module or actuator is incorporated beside the throttle body. Because there is no mechanical device that wears out, it is more effecient in delivering better mileage and performance torque (besides...the actuator module performs better in getting all throttle signals to the ecm and trany).
To test this code, check the integrity of the wires going to both the throttle body actuator and the ecm including the throttle switch. Most of the time, if you have symptoms like trany going to a limp mode, the culprit originates from the trany circuit. However, if the symptom is engine related like hesitation, the problem resides in the throttle actuator itself which may sometimes includes the replacement of the whole throttle body assembly. Contact ATS if you need a wiring diagram or detailed fixes for your throttle actuator control system.
TIP:
Before replacing the throttle control actuator and throttle body, try cleaning the throttle plates and all plug-in wiring connections. Also, watch out the throttle body mounting bolts which can easily break (use care) when removing them.

P2112 Throttle Actuator Control System - Stuck Closed

The p2104 code was set because the PCM had to set the idle speed, the p2112 was set to indicate that your throttle body was stuck closed. You can try to remove the throttle body and clean it, check to ensure that it opens smoothly, check the TPS connector to ensure that it is plugged in correctly, reset the light and if the problem returns, you will probably have to install a new throttle body assembly. Hope this helps, let me know

Try cleaning the Throttle Body,with CRC Throttle Body Cleaner.
Forget Ford-your out of warrantee

We ended up taking the vehicle to a trusted auto repair shop. The codes came up indicating a failed throttle body, most likely in the electronics. After a few more pinpoint tests, the recommendation was to replace the throttle body. The cost for this repair was just under $500. Since there is no aftermarket on this part, Genuine Ford parts were used.