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P2123 2012 Ford Fusion Code - Throttle/Pedal Position Sensor/Switch 'D' Circuit High

Quick Answer

The P2123 diagnostic trouble code (DTC) for a 2012 Ford Fusion indicates a problem with the Throttle/Pedal Position Sensor/Switch 'D' Circuit being too high. Common causes include Faulty Throttle/Pedal Position Sensor/Switch 'D', Wiring issues such as shorts or open circuits, Corrosion or poor connections in the sensor 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
P2123 2012 Ford Fusion indicates Throttle/Pedal Position Sensor/Switch 'D' Circuit High.
Common causes
Common causes include Faulty Throttle/Pedal Position Sensor/Switch 'D', Wiring issues such as shorts or open circuits, Corrosion or poor connections in the sensor 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 17, 2024
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Code P2123 2012 Ford Fusion Description

The P2123 diagnostic trouble code (DTC) for a 2012 Ford Fusion indicates a problem with the Throttle/Pedal Position Sensor/Switch 'D' Circuit being too high. This sensor is crucial for the proper functioning of the vehicle's throttle system, as it helps the engine control module (ECM) determine the correct amount of air and fuel to deliver to the engine. When this sensor reports a high voltage signal, it means that the throttle position is higher than expected, potentially leading to issues with engine performance and drivability.

OBDII Code P2123 2012 Ford Fusion - Throttle/Pedal Position Sensor/Switch 'D' Circuit High
P2123 2012 Ford Fusion Code - Throttle/Pedal Position Sensor/Switch 'D' Circuit High

Common Causes of P2123 2012 Ford Fusion

  1. Faulty Throttle/Pedal Position Sensor/Switch 'D'
  2. Wiring issues such as shorts or open circuits
  3. Corrosion or poor connections in the sensor circuit
  4. ECM malfunction or software glitches

Symptoms of P2123 2012 Ford Fusion

  1. Loss of power or acceleration
  2. Engine stalling or surging
  3. Rough idling or uneven engine performance
  4. Check Engine Light illuminated on the dashboard

How to Fix P2123 2012 Ford Fusion

  1. Begin by conducting a thorough inspection of the throttle position sensor and its wiring harness for any visible damage or corrosion.
  2. Use a multimeter to test the sensor's voltage output and compare it to the manufacturer's specifications to determine if it is within the acceptable range.
  3. If the sensor is found to be faulty, replace it with a new one following the manufacturer's guidelines.
  4. Clear the diagnostic trouble codes from the ECM using a scan tool and perform a test drive to ensure that the issue has been resolved.
  5. If the problem persists, further diagnostic testing may be required to identify any underlying wiring or ECM issues that need to be addressed.

Cost to Fix P2123 2012 Ford Fusion

The cost of repairing a Throttle/Pedal Position Sensor/Switch 'D' Circuit High issue on a 2012 Ford Fusion can vary depending on the specific cause of the problem and the labor rates in your area. In general, the cost of a new throttle position sensor can range from $50 to $150, while the labor cost for the repair can be between $100 and $200. Therefore, the total repair cost could be anywhere from $150 to $350. It is recommended to consult with a qualified mechanic or auto repair shop to get an accurate estimate based on your vehicle's specific needs and location. Labor rates at auto repair shops typically range from $80 to $150 per hour, but can vary based on various factors.

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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 P2123 2012 Ford Fusion Code

1. What are the common symptoms of OBDII code P2123 in a 2012 Ford Fusion?

- Common symptoms include reduced engine power, hesitation or stalling when accelerating, and the vehicle going into limp mode.

2. What does the OBDII code P2123 indicate in a 2012 Ford Fusion?

- OBDII code P2123 indicates an issue with the Throttle/Pedal Position Sensor/Switch 'D' Circuit High in the vehicle.

3. What are the possible causes of OBDII code P2123 in a 2012 Ford Fusion?

- Possible causes include a faulty throttle position sensor, damaged wiring or connectors in the throttle pedal circuit, or a problem with the engine control module.

4. How can I diagnose the Throttle/Pedal Position Sensor/Switch 'D' Circuit High issue in my 2012 Ford Fusion?

- Use a scan tool to read the trouble codes, inspect the throttle position sensor and its wiring for damage, and perform a thorough visual inspection of the throttle pedal circuit.

5. Can I still drive my 2012 Ford Fusion with OBDII code P2123 present?

- It is not recommended to drive the vehicle with code P2123 present as it can lead to unsafe driving conditions and potential damage to the engine.

6. How can I repair OBDII code P2123 in my 2012 Ford Fusion?

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

7. Is it possible to reset the OBDII code P2123 in a 2012 Ford Fusion without repairs?

- While clearing the code with a scan tool may temporarily turn off the check engine light, it is important to address the underlying issue to prevent further problems.

8. How much does it typically cost to repair OBDII code P2123 in a 2012 Ford Fusion?

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

9. Can a DIY enthusiast fix OBDII code P2123 in a 2012 Ford Fusion?

- While some simple repairs like sensor replacement or wiring fixes can be done by DIY enthusiasts, it is recommended to consult a professional for proper diagnosis and repair.

10. How can I prevent OBDII code P2123 from occurring in my 2012 Ford Fusion in the future?

- Regularly inspect and maintain the throttle position sensor and its related components, drive responsibly to avoid sudden acceleration or deceleration, and address any engine performance issues promptly.

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