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Engine-Codes – Ford – P0123 2002 Ford F150

P0123 2002 Ford F150 Code - Throttle Position Circuit High Input

Quick Answer

The P0123 code for a 2002 Ford F150 indicates a Throttle Position Circuit High Input. Common causes include Faulty throttle position sensor, Damaged wiring or connectors in the TPS circuit, Corrosion or poor connection in the TPS circuit. 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
P0123 2002 Ford F150 indicates Throttle Position Circuit High Input .
Common causes
Common causes include Faulty throttle position sensor, Damaged wiring or connectors in the TPS circuit, Corrosion or poor connection in the TPS circuit.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 10, 2024
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Code P0123 2002 Ford F150 Description

The P0123 code for a 2002 Ford F150 indicates a Throttle Position Circuit High Input. This means that the Engine Control Module (ECM) has detected a higher than normal voltage input from the throttle position sensor (TPS). The TPS is a sensor that monitors the position of the throttle valve in the engine, which allows the ECM to adjust the air-fuel mixture for optimal performance. When the ECM receives a high input signal from the TPS, it may cause issues with engine performance and drivability.

OBDII Code P0123 2002 Ford F150 - Throttle Position Circuit High Input
P0123 2002 Ford F150 Code - Throttle Position Circuit High Input

Common Causes of P0123 2002 Ford F150

  1. Faulty throttle position sensor
  2. Damaged wiring or connectors in the TPS circuit
  3. Corrosion or poor connection in the TPS circuit
  4. Issues with the ECM

Symptoms of P0123 2002 Ford F150

  1. Erratic idling
  2. Stalling
  3. Hesitation or surging while driving
  4. Lack of power and acceleration
  5. Decreased fuel efficiency

How to Fix P0123 2002 Ford F150

  1. Begin by diagnosing the issue using a scan tool to confirm the P0123 code and check the voltage output of the throttle position sensor.
  2. Inspect the wiring and connectors in the TPS circuit for any damage, corrosion, or loose connections. Repair or replace as needed.
  3. Test the throttle position sensor for proper operation and replace if it is faulty.
  4. Clear the fault codes from the ECM and perform a test drive to ensure the issue has been resolved.
  5. If the problem persists, further diagnosis may be required to identify any underlying issues with the ECM or other components.

Cost to Fix P0123 2002 Ford F150

The typical repair costs for addressing a Throttle Position Circuit High Input code like P0123 can range from $100 to $300, depending on the specific cause of the issue and the cost of parts and labor. It is important to note that the actual repair costs may vary based on the location, vehicle make and model, and the rates of the auto repair shop. Diagnostic time and labor rates can also influence the overall cost, so it is advisable to obtain a detailed estimate from a trusted mechanic before proceeding with the repair.

What does this mean?

Tech Notes for P0123 2002 Ford F150

The TP sensor circuit is monitored by the PCM for a high TP rotation angle (or voltage) input through the comprehensive component monitor (CCM). If during key ON engine OFF or key ON engine running the TP rotation angle (or voltage) changes above maximum calibrated limit, the test fails.

A TP PID (TP V PID) reading greater than 93% (4.65 volts) in key ON engine OFF, continuous memory or key ON engine running indicates a hard fault.

When is the Code Detected?

The Throttle Position Sensor (TPS) signal 1 circuit has reported a high voltage

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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 P0123 2002 Ford F150 Code

1. What are common symptoms of OBDII code P0123 on a 2002 Ford F150?

- Common symptoms include stalling, decreased fuel efficiency, rough idling, and issues with acceleration.

2. What does the OBDII code P0123 "Throttle Position Circuit High Input" mean on a 2002 Ford F150?

- This code indicates that the Engine Control Module (ECM) has detected a high voltage signal from the throttle position sensor.

3. What are possible causes of OBDII code P0123 on a 2002 Ford F150?

- Common causes include a faulty throttle position sensor, damaged wiring or connectors in the throttle position circuit, or issues with the ECM.

4. How can I diagnose the cause of OBDII code P0123 on a 2002 Ford F150?

- Diagnostic steps may include checking the throttle position sensor's voltage output, inspecting wiring for damage, and performing a scan tool test.

5. Is it safe to continue driving with OBDII code P0123 on a 2002 Ford F150?

- It is not recommended to drive with this code as it can lead to poor engine performance and potentially cause further damage.

6. Can I repair OBDII code P0123 on a 2002 Ford F150 myself?

- Depending on your mechanical skills, you may be able to replace the throttle position sensor or repair wiring yourself. However, professional diagnosis is recommended.

7. How much does it typically cost to repair OBDII code P0123 on a 2002 Ford F150?

- The cost of repairs can vary depending on the exact cause of the code, but it may range from $100 to $300 for parts and labor.

8. Will resetting the OBDII code P0123 on a 2002 Ford F150 make it go away permanently?

- Resetting the code may temporarily turn off the Check Engine Light, but if the underlying issue is not fixed, the code is likely to reappear.

9. Can a faulty throttle position sensor cause other issues besides triggering OBDII code P0123 on a 2002 Ford F150?

- Yes, a faulty throttle position sensor can cause erratic shifting, poor fuel economy, and other performance issues in addition to triggering this specific code.

10. How long does it take to repair OBDII code P0123 on a 2002 Ford F150?

- The repair time can vary based on the exact cause of the code and the complexity of the repair, but it typically takes 1-2 hours for a professional technician to diagnose and fix the issue.

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