AutoCodes – Ford – P2104 2002 Ford F150

P2104 2002 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 2002 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 2,698

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 2002 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 2002 Ford F150 - Throttle Actuator Control System Forced Idle - AutoCodes.com — P2104 2002 Ford F150 Code - Throttle Actuator Control System Forced Idle

What does this mean?

What are the Possible Causes of the DTC P2104 2002 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 2002 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 2002 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 2002 Ford F150 Code

1. What does OBDII code P2104 on a 2002 Ford F150 mean?

The code P2104 indicates a Throttle Actuator Control System Forced Idle condition, which means the vehicle's engine control module has detected an issue with the throttle actuator control system.

2. What are the common symptoms of OBDII code P2104 on a 2002 Ford F150?

Common symptoms of code P2104 may include reduced engine power, difficulty accelerating, rough idle, and the vehicle going into "limp mode" where it is forced to idle.

3. What are the possible causes of OBDII code P2104 on a 2002 Ford F150?

The main causes of code P2104 can be a faulty throttle body, a malfunctioning throttle position sensor, wiring issues in the throttle actuator control system, or a problem with the engine control module.

4. How can I diagnose OBDII code P2104 on a 2002 Ford F150?

Diagnosing code P2104 typically involves using an OBDII scanner to retrieve the fault code, inspecting the throttle body and related components for any visible damage or wear, and testing the throttle position sensor and wiring for proper function.

5. Can I still drive my 2002 Ford F150 with OBDII code P2104?

It is not recommended to drive your vehicle when code P2104 is present, as it can lead to unsafe driving conditions and potential further damage to the engine. It is best to address the issue promptly.

6. How do I repair OBDII code P2104 on a 2002 Ford F150?

Repairing code P2104 may involve cleaning or replacing the throttle body, replacing the throttle position sensor, repairing any damaged wiring, or reprogramming the engine control module. It is best to consult a professional mechanic for an accurate diagnosis and repair.

7. Can a DIY enthusiast fix OBDII code P2104 on a 2002 Ford F150?

While some simple tasks like cleaning the throttle body or checking the wiring connections can be done by a DIY enthusiast, diagnosing and repairing code P2104 often requires specialized tools and expertise. It is recommended to seek professional help for this issue.

8. How much does it cost to repair OBDII code P2104 on a 2002 Ford F150?

The cost of repairing code P2104 can vary depending on the specific cause of the issue, the labor rates in your area, and the parts needed for the repair. It is advisable to get multiple quotes from different mechanics to compare prices.

9. Will resetting the check engine light resolve OBDII code P2104 on a 2002 Ford F150?

Simply resetting the check engine light will not fix the underlying issue causing code P2104. The problem must be diagnosed and repaired before the check engine light will stay off.

10. How can I prevent OBDII code P2104 from appearing on my 2002 Ford F150?

To prevent code P2104, it is important to perform regular maintenance on your vehicle, including cleaning the throttle body, checking the throttle position sensor, and addressing any warning signs of potential issues promptly.