AutoCodes – Ford – P2138 2010 Ford Fusion

P2138 2010 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 2010 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.

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Code Popularity 2,860

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
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Cost to Diagnose
FAQs
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Code P2138 2010 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 2010 Ford Fusion - Throttle/Pedal Position Sensor/Switch 'D'/'E' Voltage Correlation - AutoCodes.com — P2138 2010 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 2010 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 2010 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 2010 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 P2138 2010 Ford Fusion Code

1. What are common symptoms of OBDII code P2138 in a 2010 Ford Fusion?

- Common symptoms include reduced engine power, hesitation or stalling when accelerating, and illuminated Check Engine Light.

2. What does OBDII code P2138 in a 2010 Ford Fusion indicate?

- The code P2138 indicates a voltage correlation issue between the throttle position sensor and pedal position sensor in the vehicle.

3. What are the possible causes of OBDII code P2138 in a 2010 Ford Fusion?

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

4. How can I diagnose the cause of OBDII code P2138 in my 2010 Ford Fusion?

- A thorough diagnostic process involving testing the throttle and pedal position sensors, checking for wiring faults, and inspecting the electronic throttle control system is recommended.

5. Is it safe to drive with OBDII code P2138 in a 2010 Ford Fusion?

- It is not recommended to drive the vehicle with code P2138 as it can lead to unsafe driving conditions due to potential loss of power and control.

6. Can I reset OBDII code P2138 in a 2010 Ford Fusion by disconnecting the battery?

- Disconnecting the battery may clear the code temporarily, but it is essential to diagnose and repair the underlying issue to prevent the code from reoccurring.

7. How can I repair OBDII code P2138 in my 2010 Ford Fusion?

- Repair options include replacing faulty sensors, repairing or replacing damaged wiring, or addressing issues within the electronic throttle control system.

8. Will cleaning the throttle body help resolve OBDII code P2138 in a 2010 Ford Fusion?

- While cleaning the throttle body is a good maintenance practice, it may not directly resolve the specific issue indicated by code P2138. It is essential to diagnose the problem accurately.

9. How much does it typically cost to repair OBDII code P2138 in a 2010 Ford Fusion?

- The cost of repair can vary depending on the specific cause of the code, but it may involve sensor replacement, wiring repair, or electronic throttle control system servicing.

10. Can I drive my 2010 Ford Fusion to a repair shop with OBDII code P2138?

- If the vehicle is exhibiting severe symptoms like loss of power or stalling, it is advisable to have the car towed to a repair shop to prevent any safety risks while driving.