AutoCodes – Ford – P2128 2009 Ford Fusion

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

Quick Answer

The Accelerator Pedal Position (APP) sensor is an input to the Powertrain Control Module (PCM) and used to determine the amount of torque requested by the operator. Common causes include Faulty Accelerator Pedal Position (APP) Sensor, Accelerator Pedal Position (APP) Sensor harness is open or shorted, Accelerator Pedal Position (APP) Sensor circuit poor electrical connection. 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 Accelerator Pedal Position (APP) Sensor, Accelerator Pedal Position (APP) Sensor harness is open or shorted, Accelerator Pedal Position (APP) Sensor circuit poor electrical connection.
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.

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Code Popularity 1,855

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

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Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2128 2009 Ford Fusion Description

The Accelerator Pedal Position (APP) sensor is an input to the Powertrain Control Module (PCM) and used to determine the amount of torque requested by the operator. There are 2 pedal position signals in the sensor. Both signals, APP and APP2, have a positive slope (increasing angle, increasing voltage), but are offset and increase at different rates. The 2 pedal position signals make sure the PCM receives a correct input even if 1 signal has a concern. The PCM determines if a signal is incorrect by calculating where it should be, inferred from the other signals. If a concern is present with one of the circuits the other input is used. There are 2 reference voltage circuits, 2 signal return circuits, and 2 signal circuits (a total of 6 circuits and pins) between the PCM and the APP sensor assembly. The pedal position signal is converted to pedal travel degrees (rotary angle) by the PCM. The software converts these degrees to counts, which is the input to the torque based strategy. The accelerator pedal position (APP) sensor 2 is out of self-test range high.

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

What does this mean?

What are the Possible Causes of the DTC P2128 2009 Ford Fusion?

Faulty Accelerator Pedal Position (APP) Sensor
Accelerator Pedal Position (APP) Sensor harness is open or shorted
Accelerator Pedal Position (APP) Sensor circuit poor electrical connection
Faulty Powertrain Control Module (PCM)

How to Fix the DTC P2128 2009 Ford Fusion?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2128 2009 Ford Fusion code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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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.