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Engine-Codes – Nissan – P2138 2009 Nissan Altima Sedan

P2138 2009 Nissan Altima Sedan Code - Accelerator Pedal Position Sensor Circuit Range/Performance

Quick Answer

The P2138 diagnostic trouble code (DTC) for a 2009 Nissan Altima Sedan relates to the Accelerator Pedal Position Sensor Circuit Range/Performance. Common causes include Faulty accelerator pedal position sensor, Damaged wiring harness or connections, Corrosion in electrical connectors. 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 Nissan Altima Sedan indicates Accelerator Pedal Position Sensor Circuit Range/Performance.
Common causes
Common causes include Faulty accelerator pedal position sensor, Damaged wiring harness or connections, Corrosion in electrical connectors.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 10, 2024
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Code P2138 2009 Nissan Altima Sedan Description

The P2138 diagnostic trouble code (DTC) for a 2009 Nissan Altima Sedan relates to the Accelerator Pedal Position Sensor Circuit Range/Performance. This code indicates that the signal from the accelerator pedal position sensor (APPS) does not fall within the expected range, leading to a potential performance issue in the vehicle. The APPS is a crucial component that communicates the driver's input to the engine control module (ECM), allowing the ECM to adjust the throttle opening and fuel delivery accordingly.

OBDII Code P2138 2009 Nissan Altima Sedan - Accelerator Pedal Position Sensor Circuit Range/Performance
P2138 2009 Nissan Altima Sedan Code - Accelerator Pedal Position Sensor Circuit Range/Performance

Common Causes of P2138 2009 Nissan Altima Sedan

  1. Faulty accelerator pedal position sensor
  2. Damaged wiring harness or connections
  3. Corrosion in electrical connectors
  4. ECM software issues
  5. Environmental factors such as water intrusion or debris affecting sensor performance

Symptoms of P2138 2009 Nissan Altima Sedan

  1. Erratic throttle response
  2. Hesitation or lack of response when accelerating
  3. Engine stalling
  4. Reduced power mode activation
  5. Check engine light illumination

How to Fix P2138 2009 Nissan Altima Sedan

  1. Begin by conducting a thorough inspection of the accelerator pedal position sensor, wiring harnesses, and connections for any visible damage or corrosion.
  2. Test the accelerator pedal position sensor using a multimeter to ensure it is functioning within the manufacturer's specified range.
  3. If necessary, replace the accelerator pedal position sensor with a new, OEM-quality part.
  4. Check and repair any damaged wiring harnesses or connections as needed.
  5. Clear the diagnostic trouble codes from the ECM and perform a test drive to verify that the issue has been resolved.

Cost to Fix P2138 2009 Nissan Altima Sedan

The typical repair costs for addressing the P2138 code on a 2009 Nissan Altima Sedan can range from $200 to $500, depending on the specific cause of the issue and the cost of parts and labor in your area. It is important to consult with a qualified mechanic or dealership to obtain an accurate estimate for your vehicle, as rates can vary based on location and other factors. Additionally, diagnostic time and labor rates at auto repair shops can vary, so it is advisable to inquire about these costs before proceeding with the repair.

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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 Nissan Altima Sedan Code

1. What are the common symptoms of OBDII code P2138 in a 2009 Nissan Altima Sedan?

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

2. What can cause the OBDII code P2138 in a 2009 Nissan Altima Sedan?

- The code is usually triggered by a faulty accelerator pedal position sensor or throttle position sensor, wiring issues, or a damaged connector.

3. How can I diagnose the OBDII code P2138 in my 2009 Nissan Altima Sedan?

- Diagnosis typically involves checking the accelerator pedal position sensor and throttle position sensor readings using a scan tool, as well as inspecting the wiring and connectors for any visible damage.

4. What are the potential repair options for OBDII code P2138 in a 2009 Nissan Altima Sedan?

- Repair options may include replacing the accelerator pedal position sensor, throttle position sensor, repairing any damaged wiring or connectors, and reprogramming the vehicle's computer.

5. Can I drive my 2009 Nissan Altima Sedan with the OBDII code P2138 present?

- It is not recommended to drive the vehicle with this code present as it can lead to performance issues and potential safety hazards. It is best to address the issue promptly.

6. How much does it typically cost to repair OBDII code P2138 in a 2009 Nissan Altima Sedan?

- The cost of repairs can vary depending on the specific cause of the code and the labor rates in your area. It is advisable to get a diagnostic from a professional to determine the exact repair cost.

7. Will resetting the Check Engine Light clear the OBDII code P2138 in a 2009 Nissan Altima Sedan?

- Resetting the Check Engine Light may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to reappear. It is important to diagnose and repair the root cause of the problem.

8. Can a DIY enthusiast fix the OBDII code P2138 in a 2009 Nissan Altima Sedan?

- Depending on the individual's skill level and access to tools, some DIY enthusiasts may be able to address this code by replacing the sensors or checking for wiring issues. However, it is recommended to seek professional help if unsure.

9. How long does it take to repair OBDII code P2138 in a 2009 Nissan Altima Sedan?

- The repair time can vary based on the exact cause of the code and the complexity of the repair. It may take anywhere from a couple of hours to a full day, so it is best to consult with a mechanic for a more accurate estimate.

10. Are there any recalls or technical service bulletins related to OBDII code P2138 in a 2009 Nissan Altima Sedan?

- It is advisable to check with the manufacturer or a dealership to see if there are any recalls or technical service bulletins related to this specific OBDII code for your vehicle model and year.

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