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Engine-Codes – Ford – P0123 2001 Ford F150

P0123 2001 Ford F150 Code - Throttle Position Circuit High Input

Quick Answer

The P0123 diagnostic trouble code (DTC) for a 2001 Ford F150 indicates a Throttle Position Circuit High Input. Common causes include Faulty throttle position sensor, Damaged wiring or connectors in the TPS circuit, Malfunctioning ECM. 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 2001 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, Malfunctioning ECM.
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 13, 2024
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Code P0123 2001 Ford F150 Description

The P0123 diagnostic trouble code (DTC) for a 2001 Ford F150 indicates a Throttle Position Circuit High Input. This means that the Engine Control Module (ECM) has detected a higher than normal voltage signal from the throttle position sensor (TPS). The TPS is a sensor that monitors the position of the throttle valve and sends this information to the ECM, which then adjusts the air-fuel mixture for optimal engine performance. When the ECM receives a high voltage signal from the TPS, it may cause issues with engine performance, fuel efficiency, and overall drivability of the vehicle.

OBDII Code P0123 2001 Ford F150 - Throttle Position Circuit High Input
P0123 2001 Ford F150 Code - Throttle Position Circuit High Input

Common Causes of P0123 2001 Ford F150

  1. Faulty throttle position sensor
  2. Damaged wiring or connectors in the TPS circuit
  3. Malfunctioning ECM
  4. Corrosion or poor connections in the TPS circuit
  5. Mechanical issues with the throttle body

Symptoms of P0123 2001 Ford F150

  1. Erratic idle
  2. Stalling
  3. Hesitation or surging during acceleration
  4. Reduced engine power
  5. Limited vehicle speed

How to Fix P0123 2001 Ford F150

  1. Begin by conducting a thorough inspection of the throttle position sensor, wiring, and connectors for any visible damage or corrosion.
  2. Test the throttle position sensor using a multimeter to check for proper voltage output at various throttle positions.
  3. If the TPS is faulty, replace it with a new sensor following the manufacturer's guidelines.
  4. Check and repair any damaged wiring or connectors in the TPS circuit to ensure proper electrical connections.
  5. Clear the DTC with a scan tool and perform a test drive to verify that the issue has been resolved.

Cost to Fix P0123 2001 Ford F150

The typical repair costs for addressing a Throttle Position Circuit High Input code (P0123) on a 2001 Ford F150 can range from $100 to $300, depending on the cost of parts and labor. This estimate includes the price of a new throttle position sensor, any necessary wiring repairs, and the labor involved in diagnosing and fixing the issue. It's important to note that specific diagnosis time and labor rates at auto repair shops can vary, so it's advisable to check with local shops for a more accurate estimate.

What does this mean?

Tech Notes for P0123 2001 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 2001 Ford F150 Code

1. What are the common symptoms of OBDII code P0123 in a 2001 Ford F150?

- Common symptoms include issues with engine acceleration, rough idling, poor fuel efficiency, and potential stalling.

2. What does the OBDII code P0123 indicate in a 2001 Ford F150?

- The code P0123 indicates a Throttle Position Circuit High Input error, meaning the throttle position sensor is reporting a higher than normal voltage.

3. What are the possible causes of OBDII code P0123 in a 2001 Ford F150?

- Possible causes include a faulty throttle position sensor, damaged wiring or connectors in the throttle position circuit, or a malfunctioning Engine Control Module (ECM).

4. How can I diagnose the OBDII code P0123 in a 2001 Ford F150?

- Diagnosing the code involves using an OBDII scanner to read the code, checking the throttle position sensor's voltage output, inspecting wiring for damage, and testing the ECM.

5. Can I still drive my 2001 Ford F150 with OBDII code P0123?

- It is not recommended to drive the vehicle with this code as it can lead to poor performance and potential safety issues. It's best to address the problem promptly.

6. How can I repair OBDII code P0123 in a 2001 Ford F150?

- Repair methods may include replacing the throttle position sensor, repairing or replacing damaged wiring, or reprogramming the ECM if necessary.

7. Is it safe to reset the OBDII code P0123 in a 2001 Ford F150 using a scanner?

- While resetting the code may temporarily turn off the Check Engine Light, it is important to diagnose and fix the underlying issue causing the code to prevent further problems.

8. How much does it typically cost to repair OBDII code P0123 in a 2001 Ford F150?

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

9. Can a DIY enthusiast fix OBDII code P0123 in a 2001 Ford F150?

- Depending on the individual's skill level, diagnosing and repairing the code may be possible. However, it is recommended to consult a professional if unsure.

10. How often does OBDII code P0123 occur in a 2001 Ford F150?

- The occurrence of this code can vary, but it is not uncommon in vehicles with higher mileage or older throttle position sensors. Regular maintenance can help prevent it.

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