AutoCodes – Honda – P2138 2009 Honda Accord

P2138 2009 Honda Accord Code - Accelerator Pedal Position Sensor 1/2 Incorrect Voltage

Quick Answer

When the accelerator pedal is pressed, the Engine Control Module (ECM) opens the throttle valve depending on the Accelerator Pedal Position (APP) sensor signal. Common causes include Faulty Accelerator Pedal Position Sensor, Accelerator Pedal Position Sensor harness is open or shorted, Accelerator Pedal Position 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 Honda Accord indicates Accelerator Pedal Position Sensor 1/2 Incorrect Voltage.
Common causes: Common causes include Faulty Accelerator Pedal Position Sensor, Accelerator Pedal Position Sensor harness is open or shorted, Accelerator Pedal Position 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 4,426

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
Comments
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Code P2138 2009 Honda Accord Description

When the accelerator pedal is pressed, the Engine Control Module (ECM) opens the throttle valve depending on the Accelerator Pedal Position (APP) sensor signal. As the accelerator pedal position changes, the sensor varies the signal voltage to the ECM.

OBDII Code P2138 2009 Honda Accord - Accelerator Pedal Position Sensor 1/2 Incorrect Voltage - AutoCodes.com — P2138 2009 Honda Accord Code - Accelerator Pedal Position Sensor 1/2 Incorrect Voltage

What does this mean?

What are the Possible Causes of the DTC P2138 2009 Honda Accord?

Faulty Accelerator Pedal Position Sensor
Accelerator Pedal Position Sensor harness is open or shorted
Accelerator Pedal Position Sensor circuit poor electrical connection
Faulty Electric Throttle Control Actuator

How to Fix the DTC P2138 2009 Honda Accord?

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 Honda Accord 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 Honda Accord code?

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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 2009 Honda Accord Code

1. What are the common symptoms of OBDII code P2138 in a 2009 Honda Accord?

- Common symptoms include reduced engine power, acceleration issues, and the vehicle going into "limp mode."

2. What does the OBDII code P2138 on a 2009 Honda Accord indicate?

- The code P2138 indicates that there is incorrect voltage detected in the accelerator pedal position sensor 1/2.

3. What are the possible causes of OBDII code P2138 in a 2009 Honda Accord?

- Possible causes include a faulty accelerator pedal position sensor, wiring issues, poor electrical connections, or a problem with the throttle body.

4. How can I diagnose the OBDII code P2138 in my 2009 Honda Accord?

- To diagnose the code P2138, you can use an OBDII scanner to read the code, visually inspect the wiring and connections, and test the accelerator pedal position sensor and throttle body.

5. Is it safe to continue driving my 2009 Honda Accord with OBDII code P2138?

- It is not recommended to drive your vehicle with code P2138 as it may lead to further damage and safety risks. It's best to address the issue promptly.

6. Can I repair OBDII code P2138 in my 2009 Honda Accord myself?

- Depending on your experience and tools, you may be able to repair the issue yourself by replacing the accelerator pedal position sensor, fixing wiring problems, or cleaning the throttle body.

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

- The cost of repairing code P2138 can vary depending on the exact cause of the issue. It may range from $100 to $300 for parts and labor.

8. Are there any DIY tips for fixing OBDII code P2138 in a 2009 Honda Accord?

- DIY tips include checking and cleaning the electrical connections, inspecting for damaged wires, and ensuring proper sensor installation for the accelerator pedal position sensor.

9. Can a faulty accelerator pedal position sensor cause other OBDII codes in a 2009 Honda Accord?

- Yes, a faulty accelerator pedal position sensor can cause related codes such as P2137 and P2128 to appear in addition to P2138.

10. How long does it take to repair OBDII code P2138 in a 2009 Honda Accord?

- The repair time for code P2138 can vary depending on the exact cause and complexity of the issue. It may take anywhere from 1-3 hours to complete the repair.