Question about 2005 Ford Expedition

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2005 Expedition trouble codes P2104 and P2112

What do the trouble codes P2104 and P2112 mean?

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  • ricklori458 Feb 23, 2009

    I have the same issue with the car car. I replaced the Throttle Position Sensor and that helped but the car still goes into limp mode. I understand the next step is have the onboard computer reprogrammed to the latest software updates?

    We will see if that fixes it?



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As if a simple cable linking the gas pedal to the throttle plate wasn’t good enough, engineers have now made that design complicated too. Why do engineers do these things to us? That expensive throttle body can’t cost less than a cheap little throttle cable; or can it? Are there any advantages to the manufacturer or the consumer with such a design? Let’s examine the system and see. In the Ford ETC system, the PCM directly controls the position of the throttle plate by use of a DC motor. A redesigned throttle body, coupled with a redesigned PCM, a redesigned throttle position sensor (has 2 position sensors inside of it), and the addition of an accelerator pedal position sensor (APPS) make up the ETC system directly. The ETC system replaces the throttle cable and brackets, IAC valve and it’s wiring, cruise control servo, plus some wiring for the cruise system as well. The only part of the ETC system that is truly new (excluding redesigning) to the gasoline vehicle is the APPS, and it has been in service on the DI diesel for years. So with that considered, what appears to be more complicated on the surface, is actually less elaborate when viewing the entire scope. It might cost less to build too.
The principle reason for using the ETC system is for improved drivability through its torque based strategies, which take better advantage of VCT and transmission shift strategies. There are however, other benefits. It allows the PCM to limit vehicle speed and engine rev through throttle control, rather than inducing misfires. Also, adding factory cruise control to a vehicle that wasn’t originally equipped with cruise becomes a snap; Simply replace the steering wheel (in some cases replace the clock spring too) and “tell” the PCM it has cruise, with a capable scan tool. Nice huh?
The ETC system also helps pave the way for future design changes to the vehicle’s passenger compartment as well; such as the consumer being able to slide the vehicle controls to the opposite side of the dash. ETC also makes it possible for the traditional throttle pedal to be eliminated all together by replacing it with hand controls on the steering wheel. That feature holds obvious potential for dealer or factory equipped handicap driver applications.

Posted on Jan 25, 2009


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2005 ford 150 what does thies cods mean p0121 p2104 p2112

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P2104: Throttle Actuator Control System Forced Idle

P2112: Throttle Actuator Control System - Stuck Closed

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04 Lincoln ls wrench on dash,won't accelerate past 6mph codes p2112 p2104

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Can you tell me about codes P2104 & P2112

I'm not too sure you have the correct code - see below for explanation.
Also there is a possibility you have a manufacturer specific code - Call parts dept at your local ford dealer for more.

best regards

OBD-II codes consist of a number of parts. Here is a sample OBD2 code:

Here is a breakdown of what each digit of the code means:
First Character - System The first character identifies identifies the system related to the trouble code.

  • P = Powertrain
  • B = Body
  • C = Chassis
  • U = Undefined
Second Digit - Code Type The second digit identifies whether the code is a generic code (same on all OBD-II equpped vehicles), or a manufacturer specific code.
  • 0 = Generic (this is the digit zero -- not the letter "O")
  • 1 = Enhanced (manufacturer specific)
Third Digit - Sub-System The third digit denotes the type of sub-system that pertains to the code
  • 1 = Emission Management (Fuel or Air)
  • 2 = Injector Circuit (Fuel or Air)
  • 3 = Ignition or Misfire
  • 4 = Emission Control
  • 5 = Vehicle Speed & Idle Control
  • 6 = Computer & Output Circuit
  • 7 = Transmission
  • 8 = Transmission
  • 9 = SAE Reserved
  • 0 = SAE Reserved
Fourth and Fifth Digits These digits, along with the others, are variable, and relate to a particular problem. For example,a P0171 code means P0171 - System Too Lean (Bank 1).

Aug 18, 2011 | 2005 Ford Expedition

1 Answer

Trouble code p2104 & p2112 for 2005 ford explorer xlt

There is a motor on the throttle body that opens it

It is called a Throttle Actuator Control Motor (TACM)

Those are the codes you got

DO NOT replace the throttle body

Spray the throttle plate with- CRC Throttle Body Cleaner

You should also have COP Ignition Coil-- Codes

A bad coil may be spiking the PCM,coming back
on the TPS and setting thoses codes

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The following diagnostic codes P2104, P2111, and P2112 the engine failure mode appears car wont move turn it off and on again and its fine with just the check engine light Happens several timesaday now

all the codes point to throttle body. clean throttle body, especially around throttle plate. check for loose wires, if problems persist. replace throttle body. p2104 is tac system forced idle, p2111 is tac system stuck open, p2112 is tac system stuck closed. clean throttle body good, and see if this fixes it. then go from there. have a good day !!

Jan 30, 2011 | 2005 Ford Five Hundred

1 Answer

Etc fail safe mode codes p2104 2107 2110 2111 2112

P2104 Throttle Actuator Control System - Forced Idle
P2107 Throttle Actuator Control Module Processor
P2110 Throttle Actuator Control System - Forced Limited RPM
P2111 Throttle Actuator Control System - Stuck Open
P2112 Throttle Actuator Control System - Stuck Closed

Seems like Throttle Actuator is the problem.

Good luck on this repair.

Jul 13, 2010 | 2005 Lincoln LS

1 Answer

2005 Ford Expedition (4wd) with trouble codes p2104 and p2112 completely cuts off at low speeds. All signs point to throttle position sensor, but want to make sure I'm on the right track.

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.
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

Jan 12, 2010 | 2005 Ford Expedition

2 Answers

P2104 P2112 P2111 My 2005 Expedition continues to cut off and the engine light comes on. After a few miles the light goes off. Then the problem starts all over again.

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

Dec 07, 2009 | 2005 Ford Expedition

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