AutoCodes – Ford – P0123 2002 Ford F150

P0123 2002 Ford F150 Code - Throttle Position Circuit High Input

Quick Answer

The Throttle Position Sensor (TPS) responds to the accelerator pedal movement. Common causes include Faulty throttle position sensor, Throttle position sensor harness is open or shorted, Throttle position sensor 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: P0123 2002 Ford F150 indicates Throttle Position Circuit High Input .
Common causes: Common causes include Faulty throttle position sensor, Throttle position sensor harness is open or shorted, Throttle position sensor 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.

Save to My Repairs Step-by-Step Diagnostic Guide My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 4,519

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
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P0123 2002 Ford F150 Description

The Throttle Position Sensor (TPS) responds to the accelerator pedal movement. This sensor is a kind of potentiometer which transforms the throttle position into output voltage, and emits the voltage signal to the Engine Control Module (ECM). In addition, the sensor detects the opening and closing speed of the throttle valve and feeds the voltage signal to the ECM.
Idle position of the throttle valve is determined by the ECM receiving the signal from the throttle position sensor. This sensor controls engine operation such as fuel cut. On the other hand, the Wide open and closed throttle position switch, which is built into the throttle position sensor unit, is not used for engine control.

OBDII Code P0123 2002 Ford F150 - Throttle Position Circuit High Input - AutoCodes.com — P0123 2002 Ford F150 Code - Throttle Position Circuit High Input

What does this mean?

What are the Possible Causes of the DTC P0123 2002 Ford F150?

Faulty throttle position sensor
Throttle position sensor harness is open or shorted
Throttle position sensor circuit poor electrical connection

How to Fix the DTC P0123 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 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.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0123 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.

Need more information about the P0123 2002 Ford F150 code?

Need more information on how to fix the P0123 2002 Ford F150 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0123 2002 Ford F150 code diagnosed by a professional: Find a repair shop in your area

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.