AutoCodes – Ford – P2104 1998 Ford F150

P2104 1998 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 1998 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 2,464

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 1998 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 1998 Ford F150 - Throttle Actuator Control System Forced Idle - AutoCodes.com — P2104 1998 Ford F150 Code - Throttle Actuator Control System Forced Idle

What does this mean?

What are the Possible Causes of the DTC P2104 1998 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 1998 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 1998 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 1998 Ford F150 Code

1. What is OBDII code P2104 on a 1998 Ford F150?

- OBDII code P2104 indicates a Throttle Actuator Control System Forced Idle condition on a 1998 Ford F150.

2. What are the common symptoms of OBDII code P2104 on a 1998 Ford F150?

- Common symptoms of OBDII code P2104 include the vehicle going into "limp mode," limited acceleration, and the engine idling roughly.

3. What are the possible causes of OBDII code P2104 on a 1998 Ford F150?

- Possible causes of OBDII code P2104 include a faulty throttle actuator control module, damaged wiring or connectors, or issues with the throttle body itself.

4. How can I diagnose OBDII code P2104 on a 1998 Ford F150?

- Diagnosing OBDII code P2104 involves using a scan tool to retrieve the code, checking the throttle actuator control module, inspecting for damaged wiring, and testing the throttle body.

5. How can I repair OBDII code P2104 on a 1998 Ford F150?

- Repairing OBDII code P2104 may involve replacing the throttle actuator control module, repairing or replacing damaged wiring or connectors, or cleaning/replacing the throttle body.

6. Can I drive my 1998 Ford F150 with OBDII code P2104?

- It is not recommended to drive your 1998 Ford F150 with OBDII code P2104, as it may lead to further damage to the throttle system and affect the vehicle's performance.

7. How much does it cost to repair OBDII code P2104 on a 1998 Ford F150?

- The cost to repair OBDII code P2104 on a 1998 Ford F150 can vary depending on the exact cause of the issue, but it typically ranges from $200 to $600 including parts and labor.

8. Can OBDII code P2104 on a 1998 Ford F150 cause other problems?

- Yes, if left unresolved, OBDII code P2104 on a 1998 Ford F150 can lead to issues with engine performance, fuel efficiency, and overall drivability of the vehicle.

9. How long does it take to fix OBDII code P2104 on a 1998 Ford F150?

- The time it takes to fix OBDII code P2104 on a 1998 Ford F150 can vary depending on the exact cause and complexity of the repair, but it typically takes a few hours to complete.

10. Can I reset OBDII code P2104 on a 1998 Ford F150 by disconnecting the battery?

- Disconnecting the battery may temporarily clear the code, but it is not a recommended long-term solution. It is important to diagnose and repair the underlying issue causing OBDII code P2104.