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Engine-Codes – Nissan – P2138 2011 Nissan Altima Sedan

P2138 2011 Nissan Altima Sedan Code - Accelerator Pedal Position Sensor Circuit Range/Performance

Quick Answer

The P2138 diagnostic trouble code (DTC) for a 2011 Nissan Altima Sedan indicates a problem with the Accelerator Pedal Position Sensor Circuit Range/Performance. Common causes include Faulty accelerator pedal position sensor, Wiring or connector issues in the accelerator pedal position sensor circuit, ECM software malfunction. 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 2011 Nissan Altima Sedan indicates Accelerator Pedal Position Sensor Circuit Range/Performance.
Common causes
Common causes include Faulty accelerator pedal position sensor, Wiring or connector issues in the accelerator pedal position sensor circuit, ECM software malfunction.
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 12, 2024
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Code P2138 2011 Nissan Altima Sedan Description

The P2138 diagnostic trouble code (DTC) for a 2011 Nissan Altima Sedan indicates a problem with the Accelerator Pedal Position Sensor Circuit Range/Performance. This code is triggered when the Engine Control Module (ECM) detects that the voltage signals from the accelerator pedal position sensor do not fall within the expected range, affecting the performance of the vehicle. The accelerator pedal position sensor is a crucial component that communicates the position of the accelerator pedal to the ECM, which then adjusts the throttle accordingly. When this sensor malfunctions or provides incorrect signals, it can lead to issues with acceleration, fuel efficiency, and overall engine performance.

OBDII Code P2138 2011 Nissan Altima Sedan - Accelerator Pedal Position Sensor Circuit Range/Performance
P2138 2011 Nissan Altima Sedan Code - Accelerator Pedal Position Sensor Circuit Range/Performance

Common Causes of P2138 2011 Nissan Altima Sedan

  1. Faulty accelerator pedal position sensor
  2. Wiring or connector issues in the accelerator pedal position sensor circuit
  3. ECM software malfunction
  4. Throttle body issues
  5. Electronic throttle control system malfunction

Symptoms of P2138 2011 Nissan Altima Sedan

  1. Reduced engine power
  2. Poor acceleration
  3. Engine stalling
  4. Limp mode activation
  5. Check Engine Light illuminated

How to Fix P2138 2011 Nissan Altima Sedan

  1. Begin by diagnosing the specific cause of the P2138 code using a diagnostic scanner to pinpoint the issue.
  2. Inspect the accelerator pedal position sensor and its wiring for any signs of damage or corrosion. Replace the sensor if necessary.
  3. Check the throttle body for any obstructions or malfunctions. Clean or replace the throttle body as needed.
  4. Test the ECM software for any updates or reprogramming that may be required to resolve the issue.
  5. Clear the DTC and perform a test drive to ensure that the problem has been successfully addressed.

Cost to Fix P2138 2011 Nissan Altima Sedan

The typical repair costs for addressing the P2138 code on a 2011 Nissan Altima Sedan can range from $200 to $500, including parts and labor. However, the specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. It is advisable to check local rates for a more accurate estimate. Keep in mind that rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less.

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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 2011 Nissan Altima Sedan Code

1. What is OBDII code P2138 on a 2011 Nissan Altima Sedan?

- OBDII code P2138 for a 2011 Nissan Altima Sedan refers to a fault in the accelerator pedal position sensor circuit, indicating a range/performance issue.

2. What are the common symptoms of OBDII code P2138 in a 2011 Nissan Altima Sedan?

- Common symptoms of OBDII code P2138 in a 2011 Nissan Altima Sedan include reduced engine power, hesitation or stalling when accelerating, and potentially triggering the vehicle into limp mode.

3. What are the possible causes of OBDII code P2138 on a 2011 Nissan Altima Sedan?

- Possible causes of OBDII code P2138 in a 2011 Nissan Altima Sedan include a faulty accelerator pedal position sensor, issues with the wiring or connectors in the sensor circuit, or a problem with the engine control module.

4. How can I diagnose OBDII code P2138 on my 2011 Nissan Altima Sedan?

- Diagnosing OBDII code P2138 on a 2011 Nissan Altima Sedan typically involves using a scan tool to retrieve the trouble codes, checking the accelerator pedal position sensor for proper operation, and inspecting the sensor circuit for any faults.

5. Can I still drive my 2011 Nissan Altima Sedan with OBDII code P2138?

- It is not recommended to drive your 2011 Nissan Altima Sedan with OBDII code P2138, as it can lead to performance issues and potential safety hazards. It's best to address the problem promptly.

6. How do I repair OBDII code P2138 on my 2011 Nissan Altima Sedan?

- Repairing OBDII code P2138 on a 2011 Nissan Altima Sedan may involve replacing the accelerator pedal position sensor, repairing any damaged wiring or connectors, or reprogramming the engine control module if necessary.

7. Is it possible to reset OBDII code P2138 on a 2011 Nissan Altima Sedan without fixing the underlying issue?

- While you can clear the trouble codes to temporarily reset OBDII code P2138 on a 2011 Nissan Altima Sedan, the issue will likely reoccur if the underlying problem with the accelerator pedal position sensor circuit is not addressed.

8. How much does it cost to fix OBDII code P2138 on a 2011 Nissan Altima Sedan?

- The cost to fix OBDII code P2138 on a 2011 Nissan Altima Sedan can vary depending on the exact cause of the issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.

9. Can a DIY enthusiast repair OBDII code P2138 on a 2011 Nissan Altima Sedan?

- While some DIY enthusiasts may have the skills to diagnose and repair OBDII code P2138 on a 2011 Nissan Altima Sedan, it is recommended to consult a professional mechanic for proper diagnosis and repair to ensure safety and accuracy.

10. What is the long-term impact of ignoring OBDII code P2138 on a 2011 Nissan Altima Sedan?

- Ignoring OBDII code P2138 on a 2011 Nissan Altima Sedan can lead to continued performance issues, potential damage to other components, reduced fuel efficiency, and may eventually result in more costly repairs if left unaddressed.

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