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P2122 2009 Ford Fusion Code - Throttle/Pedal Position Sensor/Switch 'D' Circuit Low

Quick Answer

The P2122 diagnostic trouble code for a 2009 Ford Fusion indicates an issue with the Throttle/Pedal Position Sensor/Switch 'D' Circuit being low. Common causes include Faulty Throttle/Pedal Position Sensor/Switch, Damaged wiring or connectors in the sensor circuit, Corrosion or contamination affecting the sensor's signal. 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
P2122 2009 Ford Fusion indicates Throttle/Pedal Position Sensor/Switch 'D' Circuit Low.
Common causes
Common causes include Faulty Throttle/Pedal Position Sensor/Switch, Damaged wiring or connectors in the sensor circuit, Corrosion or contamination affecting the sensor's signal.
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 P2122 2009 Ford Fusion Description

The P2122 diagnostic trouble code for a 2009 Ford Fusion indicates an issue with the Throttle/Pedal Position Sensor/Switch 'D' Circuit being low. This sensor is responsible for monitoring the position of the throttle pedal and sending this information to the engine control module (ECM). The ECM uses this data to determine the appropriate fuel delivery and ignition timing for optimal engine performance.

OBDII Code P2122 2009 Ford Fusion - Throttle/Pedal Position Sensor/Switch 'D' Circuit Low
P2122 2009 Ford Fusion Code - Throttle/Pedal Position Sensor/Switch 'D' Circuit Low

Common Causes of P2122 2009 Ford Fusion

  1. Faulty Throttle/Pedal Position Sensor/Switch.
  2. Damaged wiring or connectors in the sensor circuit.
  3. Corrosion or contamination affecting the sensor's signal.
  4. Issues with the ECM receiving or interpreting the sensor data correctly.
  5. Environmental factors such as extreme temperatures affecting sensor performance.

Symptoms of P2122 2009 Ford Fusion

  1. Poor acceleration or lack of response when pressing the throttle pedal.
  2. Rough idling or stalling when coming to a stop.
  3. Reduced fuel efficiency.
  4. Check Engine Light illuminated on the dashboard.
  5. Limp mode activation, limiting the vehicle's power output.

How to Fix P2122 2009 Ford Fusion

  1. Begin by diagnosing the issue using a scan tool to retrieve the trouble codes and perform a thorough inspection of the Throttle/Pedal Position Sensor/Switch 'D' Circuit.
  2. Check the sensor's wiring and connectors for any signs of damage, corrosion, or loose connections. Repair or replace as necessary.
  3. Test the Throttle/Pedal Position Sensor/Switch for proper operation and signal output. Replace the sensor if it is found to be faulty.
  4. Clear the trouble codes from the ECM's memory and perform a test drive to verify that the issue has been resolved.
  5. If the problem persists, further diagnostics may be required to identify any underlying issues with the ECM or other related components.

Cost to Fix P2122 2009 Ford Fusion

The typical repair costs for addressing a Throttle/Pedal Position Sensor/Switch 'D' Circuit Low issue on a 2009 Ford Fusion can vary depending on the specific cause of the problem. In general, the cost of replacing a faulty sensor can range from $100 to $300, including parts and labor. However, if additional repairs or diagnostics are needed, the total cost could be higher.

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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 P2122 2009 Ford Fusion Code

1. What does the OBDII code P2122 mean for a 2009 Ford Fusion?

P2122 indicates a "Throttle/Pedal Position Sensor/Switch 'D' Circuit Low," meaning the powertrain control module (PCM) has detected a low voltage signal from the throttle or pedal position sensor.

2. What are the common symptoms of code P2122?

Symptoms include reduced engine performance, a lack of throttle response, the accelerator pedal not working properly, and the vehicle potentially entering "limp mode."

3. What causes the P2122 code to appear?

The most common causes are a faulty throttle position sensor, damaged wiring or connectors in the circuit, a malfunctioning accelerator pedal position sensor, or a problem with the PCM.

4. Can I drive my 2009 Ford Fusion with the P2122 code?

It is not recommended to drive with this code active, as it can lead to reduced performance and safety concerns due to limited throttle functionality.

5. How do I diagnose the P2122 code on my Ford Fusion?

Start by inspecting the wiring and connectors for the throttle and pedal position sensors. Use a multimeter to check for proper voltage and continuity in the circuit. If necessary, scan live data to monitor sensor output.

6. What repairs can fix the P2122 code?

Repairs may include replacing the throttle position sensor, accelerator pedal position sensor, or repairing damaged wiring and connectors. In rare cases, the PCM may need to be reprogrammed or replaced.

7. How much does it cost to fix the P2122 code?

Depending on the issue, repairs can range from $100 to $400, with sensor replacements generally being less expensive than PCM-related fixes.

8. Can a dirty throttle body cause the P2122 code?

No, a dirty throttle body is not typically a cause of this code, as it specifically relates to electrical issues in the throttle/pedal position sensor circuit.

9. Will clearing the code with a scanner fix the problem?

Clearing the code may temporarily turn off the check engine light, but the underlying issue must be diagnosed and repaired to prevent the code from returning.

10. Does the P2122 code require professional repair?

If you're experienced with automotive electronics, you may be able to diagnose and fix the issue yourself. Otherwise, it's best to consult a professional mechanic for accurate troubleshooting and repair.

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