AutoCodes – Ford – P2138 2009 Ford Fusion

P2138 2009 Ford Fusion Code - Throttle/Pedal Position Sensor/Switch 'D'/'E' Voltage Correlation

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: P2138 2009 Ford Fusion indicates Throttle/Pedal Position Sensor/Switch 'D'/'E' Voltage Correlation.
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.

Save to My Repairs Step-by-Step Diagnostic Guide My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 2,099

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

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

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P2138 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. If the APP sensor inputs APP1 and APP2 disagree on the position of the accelerator pedal by more than an expected value, the P2138 is set.

OBDII Code P2138 2009 Ford Fusion - Throttle/Pedal Position Sensor/Switch 'D'/'E' Voltage Correlation - AutoCodes.com — P2138 2009 Ford Fusion Code - Throttle/Pedal Position Sensor/Switch 'D'/'E' Voltage Correlation

What does this mean?

What are the Possible Causes of the DTC P2138 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 P2138 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 P2138 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.

Need more information about the P2138 2009 Ford Fusion code?

Need more information on how to fix the P2138 2009 Ford Fusion code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2138 2009 Ford Fusion code diagnosed by a professional: Find a repair shop in your area

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 P2138 2009 Ford Fusion Code

1. What are the common symptoms of OBDII code P2138 on a 2009 Ford Fusion?

- Common symptoms include reduced engine power, hesitation or stalling during acceleration, and illuminated warning lights like the Check Engine Light.

2. What does the OBDII code P2138 in a 2009 Ford Fusion indicate?

- The code P2138 indicates a potential issue with the Throttle/Pedal Position Sensor/Switch 'D'/'E' Voltage Correlation.

3. What are the possible causes of OBDII code P2138 on a 2009 Ford Fusion?

- Possible causes include a faulty throttle position sensor, issues with the pedal position sensor, wiring or connection problems, or a malfunctioning electronic throttle control system.

4. How can I diagnose the Throttle/Pedal Position Sensor/Switch 'D'/'E' Voltage Correlation issue in my 2009 Ford Fusion?

- Diagnosis typically involves using a scan tool to retrieve the trouble codes, conducting a visual inspection of the sensors and wiring, and performing voltage tests to pinpoint the faulty component.

5. Is it safe to continue driving my 2009 Ford Fusion with OBDII code P2138 present?

- It is not recommended to drive the vehicle with this code present, as it can lead to unsafe driving conditions and potential further damage to the engine.

6. Can I repair the Throttle/Pedal Position Sensor/Switch 'D'/'E' Voltage Correlation issue in my 2009 Ford Fusion myself?

- While some DIY enthusiasts may be able to address the issue themselves, it is recommended to seek professional help to properly diagnose and repair the problem.

7. How much does it typically cost to repair OBDII code P2138 in a 2009 Ford Fusion?

- The cost of repairs can vary depending on the exact cause of the issue, but it may range from a few hundred dollars to over a thousand dollars, including parts and labor.

8. Are there any preventative measures I can take to avoid OBDII code P2138 in my 2009 Ford Fusion?

- Regular maintenance, such as keeping the throttle and pedal position sensors clean and ensuring proper wiring connections, can help prevent issues that trigger this code.

9. Can a bad throttle body cause OBDII code P2138 to appear in a 2009 Ford Fusion?

- While a faulty throttle body can potentially cause related issues, the specific cause of OBDII code P2138 is more commonly associated with problems in the throttle and pedal position sensors.

10. Will resetting the OBDII code P2138 in my 2009 Ford Fusion make it go away permanently?

- Simply clearing the code without addressing the underlying issue will not permanently resolve the problem, as the issue causing the code will likely trigger it again until properly repaired.