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P2123 2011 Ford Fusion Code - Throttle/Pedal Position Sensor/Switch 'D' Circuit High

Quick Answer

The P2123 diagnostic trouble code for a 2011 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 or connector issues in the sensor circuit, ECM software or hardware problems. 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 2011 Ford Fusion indicates Throttle/Pedal Position Sensor/Switch 'D' Circuit High.
Common causes
Common causes include Faulty Throttle/Pedal Position Sensor/Switch 'D', Wiring or connector issues in the sensor circuit, ECM software or hardware problems.
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 05, 2024
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Code P2123 2011 Ford Fusion Description

The P2123 diagnostic trouble code for a 2011 Ford Fusion indicates a problem with the Throttle/Pedal Position Sensor/Switch 'D' Circuit being too high. This sensor is crucial for the engine control module (ECM) to determine the appropriate throttle position and adjust fuel delivery and ignition timing accordingly. When the circuit voltage is too high, it can lead to incorrect throttle position readings, causing drivability issues and potentially compromising vehicle safety. This issue can affect the vehicle's performance, fuel efficiency, and emissions output.

OBDII Code P2123 2011 Ford Fusion - Throttle/Pedal Position Sensor/Switch 'D' Circuit High
P2123 2011 Ford Fusion Code - Throttle/Pedal Position Sensor/Switch 'D' Circuit High

Common Causes of P2123 2011 Ford Fusion

  1. Faulty Throttle/Pedal Position Sensor/Switch 'D'
  2. Wiring or connector issues in the sensor circuit
  3. ECM software or hardware problems
  4. Corrosion or damage to sensor components
  5. Environmental factors such as moisture or heat affecting sensor functionality

Symptoms of P2123 2011 Ford Fusion

  1. Reduced engine power or acceleration
  2. Engine stalling or rough idling
  3. Check Engine Light illuminated on the dashboard
  4. Unresponsive throttle pedal
  5. Reduced fuel economy

How to Fix P2123 2011 Ford Fusion

  1. Begin by diagnosing the specific cause of the high circuit voltage using a diagnostic scanner and multimeter.
  2. Inspect the Throttle/Pedal Position Sensor/Switch 'D' and related wiring for any visible damage or corrosion.
  3. Replace the sensor if it is found to be faulty, ensuring proper installation and calibration.
  4. Repair any damaged wiring or connectors in the circuit if necessary.
  5. Clear the diagnostic trouble codes and perform a test drive to ensure the issue has been resolved.

Cost to Fix P2123 2011 Ford Fusion

The cost for repairing a Throttle/Pedal Position Sensor/Switch 'D' Circuit High issue can vary depending on the specific cause of the problem and the labor rates of the repair shop. Generally, the parts for this repair can range from $50 to $200, with labor costs adding another $100 to $200. Therefore, the total cost for this repair could be between $150 to $400. It's important to consider that additional diagnostic time may be needed to pinpoint the exact cause of the issue, potentially increasing the overall repair cost.

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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 2011 Ford Fusion Code

1. What are the common symptoms of OBDII code P2123 in a 2011 Ford Fusion?

The common symptoms of OBDII code P2123 include issues with acceleration, reduced engine power, stalling, and potentially even the vehicle going into "limp mode."

2. What can cause the Throttle/Pedal Position Sensor/Switch 'D' Circuit High code P2123 in a 2011 Ford Fusion?

The P2123 code in a 2011 Ford Fusion is typically caused by a faulty throttle position sensor, a problem with the pedal position sensor, damaged wiring, or a corroded connector.

3. How serious is OBDII code P2123 in a 2011 Ford Fusion?

While the severity of the issue can vary, it is generally recommended to address code P2123 promptly to prevent potential safety hazards and further damage to the vehicle.

4. Can I continue driving my 2011 Ford Fusion with OBDII code P2123?

It is not advisable to continue driving your Ford Fusion with code P2123 as it can lead to performance issues, safety concerns, and potential further damage to the vehicle.

5. How can I diagnose OBDII code P2123 in my 2011 Ford Fusion?

Diagnosing OBDII code P2123 involves using an OBDII scanner to retrieve the code, visually inspecting the throttle and pedal position sensors, checking for damaged wiring, and testing the sensor's voltage.

6. What are the repair options for OBDII code P2123 in a 2011 Ford Fusion?

Repair options for code P2123 may include replacing the throttle position sensor, fixing any wiring issues, cleaning or replacing connectors, or seeking assistance from a qualified mechanic for a thorough diagnosis and repair.

7. Can I reset OBDII code P2123 in my 2011 Ford Fusion by disconnecting the battery?

While disconnecting the battery may reset the code temporarily, it is important to address the underlying issue causing code P2123 to prevent it from reoccurring.

8. How much does it cost to repair OBDII code P2123 in a 2011 Ford Fusion?

The cost of repairing code P2123 can vary depending on the extent of the issue, the parts needed for replacement, and whether you choose to do the repair yourself or seek professional help.

9. Will OBDII code P2123 cause my 2011 Ford Fusion to fail an emissions test?

Yes, if left unaddressed, code P2123 can cause your Ford Fusion to fail an emissions test due to the impact it has on the vehicle's performance and emissions system.

10. How long does it take to repair OBDII code P2123 in a 2011 Ford Fusion?

The repair time for code P2123 can vary based on the exact cause of the issue, the availability of parts, and whether you are performing the repair yourself or relying on a professional technician.

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