AutoCodes – Ford – P2128 2012 Ford Fusion

P2128 2012 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 2012 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 2,095

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 2012 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 2012 Ford Fusion - Throttle/Pedal Position Sensor/Switch 'E' Circuit High - AutoCodes.com — P2128 2012 Ford Fusion Code - Throttle/Pedal Position Sensor/Switch 'E' Circuit High

What does this mean?

What are the Possible Causes of the DTC P2128 2012 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 2012 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 2012 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 2012 Ford Fusion Code

1. What are common symptoms of OBDII code P2128 in a 2012 Ford Fusion?

- Common symptoms include issues with throttle response, reduced engine power, and the vehicle going into limp mode.

2. What does the OBDII code P2128 in a 2012 Ford Fusion indicate?

- The code P2128 indicates a problem with the Throttle/Pedal Position Sensor/Switch 'E' Circuit High.

3. What are possible causes of OBDII code P2128 in a 2012 Ford Fusion?

- Possible causes include a faulty throttle position sensor, damaged wiring or connectors, or issues with the engine control module (ECM).

4. How can I diagnose the OBDII code P2128 in my 2012 Ford Fusion?

- Diagnosing the code typically involves using a scan tool to check for the specific error code, inspecting the throttle position sensor and related components, and testing the wiring for continuity.

5. Can I still drive my 2012 Ford Fusion with the OBDII code P2128?

- It is not recommended to drive the vehicle with this code present, as it can lead to safety issues and further damage to the engine components.

6. How can I repair OBDII code P2128 in my 2012 Ford Fusion?

- Repairing the code may involve replacing the throttle position sensor, repairing damaged wiring or connectors, or reprogramming the ECM if necessary.

7. Is it possible to clear the OBDII code P2128 in a 2012 Ford Fusion without fixing the underlying issue?

- Clearing the code without addressing the root cause may temporarily turn off the check engine light, but the issue will likely reoccur if not properly repaired.

8. How much does it typically cost to fix OBDII code P2128 in a 2012 Ford Fusion?

- The cost of fixing the code can vary depending on the specific cause and the labor rates of the repair shop. Costs may range from a few hundred to over a thousand dollars.

9. Are there any DIY tips for troubleshooting OBDII code P2128 in a 2012 Ford Fusion?

- DIY tips include checking the throttle position sensor for wear or damage, inspecting the wiring for any visible issues, and ensuring all connections are secure.

10. How long does it take to repair OBDII code P2128 in a 2012 Ford Fusion?

- The repair time can vary based on the exact cause of the code and the complexity of the fix. It may take a few hours to a full day for the repair to be completed.