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Engine-Codes – Ford – P2104 Ford

P2104 Ford Code - Throttle Actuator Control System Forced Idle

Quick Answer

The P2104 Ford code indicates a problem with the Throttle Actuator Control System, specifically that the system is being forced into idle mode. Common causes include Faulty throttle position sensor, Wiring issues in the throttle actuator control system, Vacuum leaks in the intake system. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P2104 Ford indicates Throttle Actuator Control System Forced Idle.
Common causes
Common causes include Faulty throttle position sensor, Wiring issues in the throttle actuator control system, Vacuum leaks in the intake system.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 07, 2024
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Code P2104 Ford Description

The P2104 Ford code indicates a problem with the Throttle Actuator Control System, specifically that the system is being forced into idle mode. The throttle actuator control system is responsible for regulating the airflow into the engine, controlling the throttle opening, and maintaining the engine speed. When this code is triggered, it means that the engine control module (ECM) has detected an issue with the throttle actuator control system that is causing the vehicle to go into forced idle mode.

OBDII Code P2104 Ford - Throttle Actuator Control System Forced Idle
P2104 Ford Code - Throttle Actuator Control System Forced Idle

Common Causes of P2104 Ford

  1. Faulty throttle position sensor
  2. Wiring issues in the throttle actuator control system
  3. Vacuum leaks in the intake system
  4. Malfunctioning throttle body
  5. ECM software or hardware issues

Symptoms of P2104 Ford

  1. Loss of power and acceleration
  2. Engine stalling or difficulty starting
  3. Vehicle going into limp mode
  4. Check Engine Light illuminated on the dashboard

How to Fix P2104 Ford

  1. Diagnose the issue by using a scan tool to retrieve the trouble codes and perform a thorough inspection of the throttle actuator control system.
  2. Check the throttle position sensor for proper operation and replace if necessary.
  3. Inspect the wiring harness for any damage or loose connections and repair as needed.
  4. Check for vacuum leaks in the intake system and address any leaks found.
  5. If the throttle body is faulty, replace it with a new one and reprogram the ECM if required.

Cost to Fix P2104 Ford

The cost of repairing a P2104 Ford code can vary depending on the specific cause of the issue and the labor rates in your area. In general, the parts required for this repair, such as a throttle position sensor or throttle body, can range from $100 to $300. Additionally, the labor costs for diagnosing and repairing the issue can range from $200 to $500. Overall, you can expect to pay anywhere from $300 to $800 for resolving a P2104 code, but it's essential to get a personalized estimate from a qualified mechanic or auto repair shop.

What does this mean?

Tech Notes for P2104 Ford

The P2104 code is an informational code only and may set in combination with a number of other codes which are causing the Failure Mode Effects Management (FMEM). If other codes are present, diagnose other codes first.

When is the Code Detected?

The P2104 code is an informational code only and may set in combination with a number of other codes which are causing the Failure Mode Effects Management (FMEM).

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Information for Specific Ford Models

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P2104 Ford Code

1. What are common symptoms of OBDII code P2104 in a Ford vehicle?

The common symptoms of OBDII code P2104 in a Ford vehicle include the engine stalling, reduced power and acceleration, rough idling, and the vehicle going into a forced idle mode.

2. What does the OBDII code P2104 in a Ford mean?

OBDII code P2104 in a Ford indicates a problem with the Throttle Actuator Control System, specifically that the system is forcing the vehicle into an idle state.

3. What are the possible causes of OBDII code P2104 in a Ford?

Possible causes of OBDII code P2104 in a Ford include a faulty throttle body, issues with the throttle position sensor, a malfunctioning electronic throttle control system, or wiring/connectivity problems.

4. How can I diagnose the OBDII code P2104 in my Ford vehicle?

Diagnosing OBDII code P2104 in a Ford typically involves using an OBDII scanner to read the code, checking the throttle body and related components for any visible damage or wear, and testing the throttle position sensor and electronic throttle control system.

5. Can I drive my Ford with OBDII code P2104?

It is not recommended to drive your Ford with OBDII code P2104, as the vehicle may experience performance issues and potentially stall while driving. It's best to address the underlying problem before continuing to drive the vehicle.

6. How can I repair OBDII code P2104 in my Ford?

Repairing OBDII code P2104 in a Ford may involve replacing the throttle body, repairing or replacing the throttle position sensor, checking and repairing any wiring/connectivity issues, or resetting the electronic throttle control system.

7. Can a DIY enthusiast fix OBDII code P2104 in a Ford?

While some experienced DIY enthusiasts may be able to address OBDII code P2104 in a Ford by following repair guides and using the necessary tools, it's recommended to seek professional help for accurate diagnosis and repair.

8. How much does it cost to fix OBDII code P2104 in a Ford?

The cost of fixing OBDII code P2104 in a Ford can vary depending on the underlying issue, the parts needed for repair, and whether you choose to do the repair yourself or take the vehicle to a mechanic. Costs may range from a few hundred to over a thousand dollars.

9. What happens if I ignore OBDII code P2104 in my Ford?

Ignoring OBDII code P2104 in a Ford can lead to further damage to the throttle control system, decreased fuel efficiency, engine performance issues, and potentially unsafe driving conditions. It's best to address the problem promptly.

10. How can I prevent OBDII code P2104 in my Ford in the future?

To prevent OBDII code P2104 in your Ford in the future, it's essential to perform regular maintenance checks, such as cleaning the throttle body, inspecting the throttle position sensor, and ensuring proper connectivity of the electronic throttle control system components.

Discuss the causes and fixes for P2104 Ford OBDII Code

Submit a New Comment

  • 2104 is what part is and how do i located

    Reply to Comment

  • What model?

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  • When I put the TAC motor on i noticed the butterflies were slamming shut and sticking shut. You would have to really stab it by finger to get it to open up. So probably the wrong thing to do I turned the adjuster screw a little until the butterflies would quit sticking. Now I can not get the TAC out of FMEM forced Idle. I adjusted the screw back out, have double checked my spring placement. and nothing works. Replaced the EGR valve also and am getting a Low circuit reading on that as well P0405. Any suggestions?

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  • Try disconnecting the car battery for about 30 minutes to reset the system and drive a few miles for the idle to reset.

    Did you disconnect the TAC when you were moving the butterflies? with the TAC connected, the TAC could act as a generator when moving the butterflies and damage other components like the PCM.

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  • yes i did, after further examination the butterfly was open about 20 degrees or better even at idle. I tightened the spring in the TAC one full turn. Fixed all

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  • Great!! I'm glad you solve the problem.

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  • are the TAC and the throttle body motor the same thing?

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  • Yes on most vehicles, what model and year is your Ford?

    Reply to Comment

  • 2005 Ford F150 Lariat.

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