AutoCodes – Ford – P2138 2006 Ford Fusion

P2138 2006 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 2006 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 2,675

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 2006 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 2006 Ford Fusion - Throttle/Pedal Position Sensor/Switch 'D'/'E' Voltage Correlation - AutoCodes.com — P2138 2006 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 2006 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 2006 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 2006 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 2006 Ford Fusion Code

1. What does the OBDII code P2138 mean on a 2006 Ford Fusion?

P2138 indicates a voltage correlation issue between the throttle or pedal position sensors 'D' and 'E,' meaning the ECM is detecting inconsistent signals from the sensors.

2. What are the common symptoms of P2138 in a 2006 Ford Fusion?

Symptoms include reduced engine power, the throttle not responding properly, the check engine light illuminating, and the vehicle potentially entering "limp mode."

3. What causes the P2138 code in a 2006 Ford Fusion?

Common causes include a faulty accelerator pedal position sensor, damaged or corroded wiring, loose electrical connections, or a failing throttle body.

4. Can a dirty throttle body cause the P2138 code?

While uncommon, a dirty or malfunctioning throttle body can contribute to the issue if it affects the sensor readings.

5. How do you fix the P2138 code on a 2006 Ford Fusion?

Repairs may involve replacing the accelerator pedal position sensor, repairing damaged wiring or connectors, or replacing the throttle body if itâ€™s faulty.

6. Is it safe to drive with a P2138 code on a 2006 Ford Fusion?

Itâ€™s not recommended, as the code can cause unpredictable throttle response and reduced power, which may lead to dangerous driving situations.

7. How do you diagnose the P2138 code in a 2006 Ford Fusion?

Diagnosis typically involves scanning for codes, inspecting the wiring and connectors for damage, testing the accelerator pedal sensor, and checking the throttle body for proper operation.

8. What tools are needed to diagnose the P2138 code on a 2006 Ford Fusion?

Youâ€™ll need an OBDII scanner, a multimeter to test voltage and continuity, and possibly a throttle body cleaner for maintenance.

9. Will clearing the P2138 code fix the issue on a 2006 Ford Fusion?

Clearing the code may temporarily erase the check engine light, but the underlying issue must be resolved to prevent the code from returning.

10. How much does it cost to fix the P2138 code on a 2006 Ford Fusion?

Repair costs vary but may include $50â€“$150 for a new pedal position sensor or $300â€“$600 for a throttle body replacement, plus labor if done by a mechanic.