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P1123 Ford Code - Throttle Position Sensor Circuit Intermittent High Voltage

Quick Answer

The P1123 code for Ford vehicles indicates a problem with the Throttle Position Sensor (TPS) circuit experiencing intermittent high voltage. Common causes include Faulty Throttle Position Sensor, Damaged wiring or connectors in the TPS circuit, Corrosion or poor connections 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
P1123 Ford indicates Throttle Position Sensor Circuit Intermittent High Voltage.
Common causes
Common causes include Faulty Throttle Position Sensor, Damaged wiring or connectors in the TPS circuit, Corrosion or poor connections 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 11, 2024
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Code P1123 Ford Description

The P1123 code for Ford vehicles indicates a problem with the Throttle Position Sensor (TPS) circuit experiencing intermittent high voltage. The TPS is a crucial component that monitors the position of the throttle valve and sends this information to the engine control module (ECM). This data helps the ECM adjust the air-fuel mixture for optimal engine performance.

OBDII Code P1123 Ford - Throttle Position Sensor Circuit Intermittent High Voltage
P1123 Ford Code - Throttle Position Sensor Circuit Intermittent High Voltage

Common Causes of P1123 Ford

  1. Faulty Throttle Position Sensor
  2. Damaged wiring or connectors in the TPS circuit
  3. Corrosion or poor connections in the TPS circuit
  4. Issues with the ECM receiving incorrect signals from the TPS

Symptoms of P1123 Ford

  1. Rough idling or unstable engine speed
  2. Decreased fuel efficiency
  3. Hesitation or jerking during acceleration
  4. Check Engine Light illuminated on the dashboard

How to Fix P1123 Ford

  1. Perform a thorough diagnostic scan to confirm the P1123 code and identify the specific cause of the high voltage signal.
  2. Inspect the TPS sensor, wiring, and connectors for any visible damage or corrosion. Replace any faulty components.
  3. Test the TPS sensor's voltage output and resistance to ensure it is functioning within specifications.
  4. Clear the error code from the ECM and perform a test drive to verify that the issue has been resolved.
  5. If the problem persists, further troubleshooting may be required to pinpoint the exact source of the high voltage signal.

Cost to Fix P1123 Ford

The typical repair costs for resolving a P1123 code can range from $100 to $300, depending on the specific cause of the issue and the cost of replacement parts. This estimate includes both parts and labor. However, it is important to note that diagnosis time and labor rates at auto repair shops can vary significantly based on factors such as location, vehicle make and model, and engine type. It is recommended to check with local repair shops for a more accurate estimate based on your specific circumstances.

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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 P1123 Ford Code

1. What are the common symptoms of OBDII code P1123 in a Ford related to the throttle position sensor circuit?

- Common symptoms include rough idling, poor acceleration, stalling, and potential lack of power in the vehicle.

2. What could be causing the Throttle Position Sensor Circuit Intermittent High Voltage error code (P1123) in a Ford?

- Potential causes include a faulty throttle position sensor, damaged wiring or connectors, issues with the throttle body, or a problem with the engine control module.

3. How can I diagnose the Throttle Position Sensor Circuit Intermittent High Voltage issue in my Ford?

- You can use a multimeter to test the throttle position sensor's voltage output, inspect the wiring and connectors for any damage, and perform a thorough visual inspection of the throttle body components.

4. Can a dirty throttle body cause OBDII code P1123 in a Ford?

- Yes, a dirty or clogged throttle body can disrupt the proper functioning of the throttle position sensor and potentially trigger the P1123 error code.

5. Is it safe to drive my Ford with the P1123 error code related to the throttle position sensor circuit?

- It is not recommended to drive the vehicle with the P1123 code present, as it can lead to poor performance and potential safety hazards. It's best to address the issue promptly.

6. How can I repair the Throttle Position Sensor Circuit Intermittent High Voltage problem in my Ford?

- Repair options may include replacing the throttle position sensor, repairing or replacing damaged wiring or connectors, cleaning the throttle body, or resetting the engine control module.

7. Can resetting the Check Engine Light clear the P1123 trouble code in a Ford?

- While resetting the Check Engine Light may temporarily clear the code, it is important to diagnose and address the underlying issue causing the P1123 code to prevent it from reoccurring.

8. Will disconnecting the battery reset the throttle position sensor in a Ford with code P1123?

- Disconnecting the battery may reset the vehicle's computer system, but it will not necessarily resolve the underlying problem with the throttle position sensor circuit causing the P1123 error code.

9. How much does it typically cost to repair the Throttle Position Sensor Circuit Intermittent High Voltage issue in a Ford?

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

10. Can a DIY enthusiast fix the P1123 error code related to the throttle position sensor circuit in a Ford?

- Depending on the individual's skills and experience, some DIY enthusiasts may be able to address the issue by following repair guides and using the necessary tools. However, it is recommended to consult a professional if unsure.

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