AutoCodes – Ford – P2104 1999 Ford F150

P2104 1999 Ford F150 Code - Throttle Actuator Control System Forced Idle

Quick Answer

The electronic Throttle Actuator Control (TAC) is a DC motor controlled by the Powertrain Control Module (PCM). Common causes include Faulty Throttle Actuator Control (TAC), Throttle Actuator Control (TAC) harness is open or shorted, Throttle Actuator Control (TAC) circuit poor electrical connection. 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 1999 Ford F150 indicates Throttle Actuator Control System Forced Idle.
Common causes: Common causes include Faulty Throttle Actuator Control (TAC), Throttle Actuator Control (TAC) harness is open or shorted, Throttle Actuator Control (TAC) circuit poor electrical connection.
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.

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Code Popularity 2,598

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P2104 1999 Ford F150 Description

The electronic Throttle Actuator Control (TAC) is a DC motor controlled by the Powertrain Control Module (PCM). There are 2 designs for the TAC, parallel and inline. The parallel design has the motor under the bore parallel to the plate shaft. The motor housing is integrated into the main housing. The inline design has a separate motor housing. An internal spring is used in both designs to return the throttle plate to a default position. The default position is typically a throttle angle of 7 to 8 degrees from the hard stop angle. The closed throttle plate hard stop prevents the throttle from binding in the bore. This hard stop setting is not adjustable and is set to result in less airflow than the minimum engine airflow required at idle. The P2104 code is set when the Throttle Actuator Control (TAC) system is in the Failure Mode Effects Management (FMEM) mode of forced idle.

OBDII Code P2104 1999 Ford F150 - Throttle Actuator Control System Forced Idle - AutoCodes.com — P2104 1999 Ford F150 Code - Throttle Actuator Control System Forced Idle

What does this mean?

What are the Possible Causes of the DTC P2104 1999 Ford F150?

Faulty Throttle Actuator Control (TAC)
Throttle Actuator Control (TAC) harness is open or shorted
Throttle Actuator Control (TAC) circuit poor electrical connection
Faulty Powertrain Control Module (PCM)

How to Fix the DTC P2104 1999 Ford F150?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What does this mean?

Code Tech Notes

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.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2104 1999 Ford F150 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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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 1999 Ford F150 Code

1. What does OBDII code P2104 mean for a 1999 Ford F150?

The OBDII code P2104 for a 1999 Ford F150 indicates an issue with the Throttle Actuator Control System Forced Idle.

2. What are the common symptoms of OBDII code P2104 in a 1999 Ford F150?

Common symptoms of OBDII code P2104 in a 1999 Ford F150 include the vehicle going into "limp mode," reduced engine power, and the engine idling higher than normal.

3. What are some possible causes of OBDII code P2104 in a 1999 Ford F150?

Possible causes of OBDII code P2104 in a 1999 Ford F150 include a faulty throttle actuator control module, damaged wiring or connectors, or a problem with the throttle body.

4. How can I diagnose the OBDII code P2104 in my 1999 Ford F150?

Diagnosing the OBDII code P2104 in a 1999 Ford F150 typically involves using a scan tool to retrieve the trouble codes, checking the throttle actuator control system components for any visible damage, and testing the wiring and connectors for continuity.

5. What steps can I take to repair OBDII code P2104 in my 1999 Ford F150?

Repairing OBDII code P2104 in a 1999 Ford F150 may involve replacing the throttle actuator control module, repairing or replacing damaged wiring or connectors, or cleaning and inspecting the throttle body.

6. Can I continue driving my 1999 Ford F150 with OBDII code P2104?

It is not recommended to continue driving your 1999 Ford F150 with OBDII code P2104, as it can lead to further damage to the throttle actuator control system and potentially cause unsafe driving conditions.

7. How much does it typically cost to repair OBDII code P2104 in a 1999 Ford F150?

The cost of repairing OBDII code P2104 in a 1999 Ford F150 can vary depending on the specific issue causing the code, but it may range from $200 to $600 or more, including parts and labor.

8. Can a DIY enthusiast repair OBDII code P2104 in a 1999 Ford F150?

Depending on their skill level and experience, a DIY enthusiast may be able to repair OBDII code P2104 in a 1999 Ford F150 by following repair guides and using the necessary tools and equipment.

9. Is OBDII code P2104 a common issue in 1999 Ford F150 vehicles?

OBDII code P2104 is not a common issue in 1999 Ford F150 vehicles, but it can occur due to various factors such as wear and tear, electrical problems, or component failures.

10. How can I prevent OBDII code P2104 from occurring in my 1999 Ford F150?

To prevent OBDII code P2104 from occurring in your 1999 Ford F150, it is essential to perform regular maintenance, keep the throttle actuator control system components clean, and address any warning signs promptly to avoid potential issues.