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Engine-Codes – Ford – P2128 2009 Ford Fusion

P2128 2009 Ford Fusion Code - Throttle/Pedal Position Sensor/Switch 'E' Circuit High

Quick Answer

The P2128 diagnostic trouble code for a 2009 Ford Fusion indicates an issue with the Throttle/Pedal Position Sensor/Switch 'E' Circuit being too high. Common causes include Faulty throttle position sensor, Corroded or damaged wiring in the sensor circuit, ECM software or hardware issues. 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
P2128 2009 Ford Fusion indicates Throttle/Pedal Position Sensor/Switch 'E' Circuit High.
Common causes
Common causes include Faulty throttle position sensor, Corroded or damaged wiring in the sensor circuit, ECM software or hardware issues.
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 P2128 2009 Ford Fusion Description

The P2128 diagnostic trouble code for a 2009 Ford Fusion indicates an issue with the Throttle/Pedal Position Sensor/Switch 'E' Circuit being too high. This sensor is crucial for the vehicle's electronic throttle control system, as it helps determine the position of the throttle pedal and communicates this information to the engine control module (ECM). When the sensor detects that the voltage in the circuit is higher than normal, it triggers the P2128 code.

OBDII Code P2128 2009 Ford Fusion - Throttle/Pedal Position Sensor/Switch 'E' Circuit High
P2128 2009 Ford Fusion Code - Throttle/Pedal Position Sensor/Switch 'E' Circuit High

Common Causes of P2128 2009 Ford Fusion

  1. Faulty throttle position sensor
  2. Corroded or damaged wiring in the sensor circuit
  3. ECM software or hardware issues
  4. Poor electrical connections
  5. Environmental factors such as moisture or debris affecting sensor operation

Symptoms of P2128 2009 Ford Fusion

  1. Rough idling or engine stalling
  2. Reduced acceleration or lack of response to throttle input
  3. Check Engine Light illuminated on the dashboard
  4. Vehicle going into limp mode
  5. Poor fuel efficiency

How to Fix P2128 2009 Ford Fusion

  1. Use an OBD-II scanner to confirm the P2128 code and diagnose the specific cause of the issue.
  2. Inspect the throttle position sensor and its wiring for any visible damage or corrosion.
  3. Test the sensor's voltage output using a multimeter to ensure it is within the manufacturer's specifications.
  4. Replace the throttle position sensor if it is found to be faulty, ensuring proper installation and calibration.
  5. Clear the trouble code from the ECM's memory and test drive the vehicle to verify that the issue has been resolved.

Cost to Fix P2128 2009 Ford Fusion

The typical repair costs for addressing a P2128 code on a 2009 Ford Fusion can range from $150 to $400, including parts and labor. However, it's important to note that specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. Rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less. It's advisable to check local rates for a more accurate estimate before proceeding with the repair.

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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 P2128 2009 Ford Fusion Code

1. What are common symptoms of OBDII code P2128 in a 2009 Ford Fusion?

The common symptoms of code P2128 include reduced engine power, hesitation or surging while driving, and the vehicle going into "limp mode."

2. What does the Throttle/Pedal Position Sensor/Switch 'E' Circuit High mean in relation to OBDII code P2128?

The code P2128 indicates that the voltage signal from the throttle/pedal position sensor or switch 'E' circuit is higher than normal, suggesting a potential issue with the sensor or its circuit.

3. What are possible causes of OBDII code P2128 in a 2009 Ford Fusion?

Possible causes of code P2128 include a faulty throttle/pedal position sensor, damaged wiring or connectors in the sensor circuit, or a problem with the engine control module (ECM).

4. How can I diagnose the cause of OBDII code P2128 in my 2009 Ford Fusion?

Diagnosing code P2128 may involve inspecting the throttle/pedal position sensor and its wiring for damage, testing the sensor's voltage output, and checking for any ECM-related issues using a diagnostic scanner.

5. Is it safe to continue driving my 2009 Ford Fusion with OBDII code P2128 present?

It is not recommended to drive your vehicle with code P2128 present, as it can lead to unsafe driving conditions due to reduced engine power and potential performance issues.

6. Can I repair OBDII code P2128 in my 2009 Ford Fusion myself?

Depending on your experience and tools available, you may be able to repair code P2128 yourself by replacing the throttle/pedal position sensor, repairing damaged wiring, or addressing any ECM issues.

7. How much does it typically cost to fix OBDII code P2128 in a 2009 Ford Fusion?

The cost to fix code P2128 can vary depending on the exact cause of the issue. Replacing a throttle/pedal position sensor or repairing wiring may cost a few hundred dollars, while ECM-related repairs could be more expensive.

8. Will resetting the OBDII code P2128 in my 2009 Ford Fusion make it go away permanently?

Resetting the code may temporarily clear the check engine light, but if the underlying issue causing code P2128 is not addressed, the code is likely to reappear after driving the vehicle again.

9. How urgent is it to address OBDII code P2128 in a 2009 Ford Fusion?

It is important to address code P2128 promptly to prevent potential drivability issues and further damage to engine components. Ignoring the code can lead to more costly repairs in the future.

10. Can extreme weather conditions affect the occurrence of OBDII code P2128 in a 2009 Ford Fusion?

Extreme weather conditions, such as extreme heat or cold, can sometimes affect the performance of sensors and electrical components in the throttle/pedal position system, potentially triggering code P2128.

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