AutoCodes – Ford – P2138 2007 Ford Fusion

P2138 2007 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 2007 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 2,426

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 2007 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 2007 Ford Fusion - Throttle/Pedal Position Sensor/Switch 'D'/'E' Voltage Correlation - AutoCodes.com — P2138 2007 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 2007 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 2007 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 2007 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 2007 Ford Fusion Code

1. What are the common symptoms of OBDII code P2138 in a 2007 Ford Fusion?

- Common symptoms of P2138 include reduced engine power, hesitation or stalling when accelerating, and illuminated Check Engine Light.

2. What does the OBDII code P2138 indicate in a 2007 Ford Fusion?

- P2138 indicates a fault in the Throttle/Pedal Position Sensor/Switch 'D'/'E' voltage correlation in the vehicle's electronic throttle control system.

3. What are the possible causes of OBDII code P2138 in a 2007 Ford Fusion?

- Possible causes of P2138 include a faulty throttle position sensor, damaged wiring or connectors, a defective accelerator pedal position sensor, or issues with the electronic throttle control module.

4. How can I diagnose the cause of OBDII code P2138 in my 2007 Ford Fusion?

- Diagnosing P2138 typically involves using a scan tool to check for related codes, testing the throttle position sensor and accelerator pedal position sensor, and inspecting the wiring and connectors for any visible damage.

5. Can driving with an OBDII code P2138 in a 2007 Ford Fusion cause further damage?

- Continuing to drive with P2138 may lead to reduced engine performance, potential stalling, and further damage to the electronic throttle control system if the underlying issue is not addressed promptly.

6. Is it safe to continue driving my 2007 Ford Fusion with the OBDII code P2138 present?

- It is generally not recommended to drive with P2138 present, as it can affect the drivability and safety of the vehicle. It is advisable to address the issue as soon as possible.

7. How can I repair OBDII code P2138 in my 2007 Ford Fusion?

- Repairing P2138 may involve replacing the faulty throttle position sensor or accelerator pedal position sensor, repairing damaged wiring or connectors, or reprogramming the electronic throttle control module.

8. Are there any DIY tips for fixing OBDII code P2138 in a 2007 Ford Fusion?

- While some basic diagnostic steps can be performed by DIY enthusiasts, repairing P2138 often requires specialized tools and expertise. It is recommended to consult a professional mechanic for proper diagnosis and repair.

9. Is resetting the Check Engine Light a sufficient fix for OBDII code P2138 in a 2007 Ford Fusion?

- Simply resetting the Check Engine Light without addressing the underlying issue causing P2138 will not resolve the problem. It is important to diagnose and repair the root cause of the code for a lasting fix.

10. How much does it typically cost to repair OBDII code P2138 in a 2007 Ford Fusion?

- The cost of repairing P2138 can vary depending on the specific cause of the issue, labor rates in your area, and the parts needed. It is advisable to obtain a diagnosis from a mechanic to get an accurate estimate.