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

- Code Popularity: 2,363 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 2/3
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What are the Possible Causes of the DTC P2104 1999 Ford F150?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • 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)
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How to Fix the DTC P2104 1999 Ford F150?

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

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.

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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. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

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).

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

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

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