AutoCodes – Ford – P2104 1997 Ford F150

P2104 1997 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 1997 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 2,840

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 1997 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 1997 Ford F150 - Throttle Actuator Control System Forced Idle - AutoCodes.com — P2104 1997 Ford F150 Code - Throttle Actuator Control System Forced Idle

What does this mean?

What are the Possible Causes of the DTC P2104 1997 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 1997 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 1997 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 1997 Ford F150 Code

1. What does OBDII code P2104 mean for my 1997 Ford F150?

- OBDII code P2104 indicates an issue with the Throttle Actuator Control System Forced Idle in your vehicle.

2. What are the common symptoms of OBDII code P2104 in a 1997 Ford F150?

- Common symptoms of OBDII code P2104 may include the vehicle going into "limp mode," reduced engine power, and difficulty accelerating.

3. What are the possible causes of OBDII code P2104 in a 1997 Ford F150?

- Possible causes of OBDII code P2104 may include a faulty throttle body, a malfunctioning throttle position sensor, wiring issues, or a problem with the engine control module.

4. How can I diagnose the issue related to OBDII code P2104 in my 1997 Ford F150?

- Diagnosing the issue related to OBDII code P2104 may involve using a scan tool to check for other related trouble codes, inspecting the throttle body and sensors for any visible damage, and testing the wiring for continuity.

5. Can I still drive my 1997 Ford F150 with OBDII code P2104 present?

- It is not recommended to drive your 1997 Ford F150 with OBDII code P2104 present, as it may lead to further damage and safety risks.

6. How can I repair OBDII code P2104 in my 1997 Ford F150?

- Repairing OBDII 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.

7. Is it possible to reset OBDII code P2104 in a 1997 Ford F150 without repairs?

- While clearing the trouble code may temporarily turn off the check engine light, it is crucial to address the underlying issue causing OBDII code P2104 to prevent future problems.

8. Can a DIY enthusiast fix OBDII code P2104 in a 1997 Ford F150?

- Depending on the level of expertise and access to tools, a DIY enthusiast may be able to address OBDII code P2104 by following repair guides or consulting with a professional for assistance.

9. How much does it typically cost to repair OBDII code P2104 in a 1997 Ford F150?

- The cost of repairing OBDII code P2104 in a 1997 Ford F150 can vary based on the specific issue, parts needed, labor rates, and whether the repair is done at a dealership or an independent mechanic.

10. What should I do if OBDII code P2104 keeps coming back in my 1997 Ford F150 after repairs?

- If OBDII code P2104 keeps reappearing after repairs, it is advisable to recheck the components, ensure proper installation, and consider seeking professional help to diagnose any underlying issues.