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P2138 2008 Nissan Pathfinder Code - Accelerator Pedal Position Sensor Circuit Range/Performance

Quick Answer

The P2138 diagnostic trouble code (DTC) for a 2008 Nissan Pathfinder refers to the Accelerator Pedal Position Sensor Circuit Range/Performance. Common causes include Faulty accelerator pedal position sensor, Damaged wiring or connectors in the sensor circuit, Malfunctioning ECM. 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 2008 Nissan Pathfinder indicates Accelerator Pedal Position Sensor Circuit Range/Performance.
Common causes
Common causes include Faulty accelerator pedal position sensor, Damaged wiring or connectors in the sensor circuit, Malfunctioning ECM.
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 11, 2024
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Code P2138 2008 Nissan Pathfinder Description

The P2138 diagnostic trouble code (DTC) for a 2008 Nissan Pathfinder refers to the Accelerator Pedal Position Sensor Circuit Range/Performance. This means that the Engine Control Module (ECM) has detected a discrepancy in the voltage signals from the accelerator pedal position sensor, which is responsible for sending information to the ECM about the position of the accelerator pedal. This sensor is crucial for the proper functioning of the vehicle's electronic throttle control system, as it helps regulate the amount of air and fuel entering the engine based on the driver's input.

OBDII Code P2138 2008 Nissan Pathfinder - Accelerator Pedal Position Sensor Circuit Range/Performance
P2138 2008 Nissan Pathfinder Code - Accelerator Pedal Position Sensor Circuit Range/Performance

Common Causes of P2138 2008 Nissan Pathfinder

  1. Faulty accelerator pedal position sensor
  2. Damaged wiring or connectors in the sensor circuit
  3. Malfunctioning ECM
  4. Issues with the electronic throttle control system
  5. Corrosion or water damage in the sensor circuit

Symptoms of P2138 2008 Nissan Pathfinder

  1. Poor acceleration or lack of response when pressing the accelerator pedal
  2. Hesitation or surging during acceleration
  3. Rough idling or stalling
  4. Illumination of the Check Engine Light
  5. Vehicle going into limp mode

How to Fix P2138 2008 Nissan Pathfinder

  1. Perform a thorough inspection of the accelerator pedal position sensor and its wiring for any signs of damage or corrosion.
  2. Test the sensor's voltage signals using a multimeter to determine if it is functioning properly.
  3. Replace the accelerator pedal position sensor if it is found to be faulty.
  4. Repair or replace any damaged wiring or connectors in the sensor circuit.
  5. Clear the DTC and perform a test drive to ensure the issue has been resolved.

Cost to Fix P2138 2008 Nissan Pathfinder

The typical repair costs for addressing a P2138 code on a 2008 Nissan Pathfinder can range from $150 to $400, including parts and labor. However, 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's recommended to check with local shops for a more accurate estimate based on your specific circumstances. Keep in mind that rates at dealerships or in metropolitan areas may be higher, while independent shops often offer more competitive pricing.

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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 2008 Nissan Pathfinder Code

1. What are the common symptoms of OBDII code P2138 in a 2008 Nissan Pathfinder?

- Common symptoms include the vehicle going into "limp mode," reduced engine power, throttle response issues, and the Check Engine light illuminating.

2. What does the OBDII code P2138 indicate on a 2008 Nissan Pathfinder?

- OBDII code P2138 indicates a problem with the accelerator pedal position sensor circuit, specifically relating to range/performance issues.

3. What are the possible causes of OBDII code P2138 in a 2008 Nissan Pathfinder?

- Potential causes include a faulty accelerator pedal position sensor, issues with the throttle body, damaged wiring or connectors in the circuit, or a malfunctioning Engine Control Module (ECM).

4. How can I diagnose the OBDII code P2138 on my 2008 Nissan Pathfinder?

- Diagnosing this code typically involves using a scan tool to check for the specific trouble codes, inspecting the accelerator pedal and throttle body for any visible damage, and testing the sensor and circuit for proper operation.

5. Can I still drive my 2008 Nissan Pathfinder with the OBDII code P2138 present?

- It is not recommended to continue driving with this code present, as it can lead to further damage and safety concerns. It is advisable to have the issue diagnosed and repaired as soon as possible.

6. How can I repair OBDII code P2138 on a 2008 Nissan Pathfinder?

- Repair options may include replacing the accelerator pedal position sensor, repairing any damaged wiring or connectors, cleaning the throttle body, or reprogramming the ECM. Professional diagnosis and repair may be necessary.

7. Is it safe to reset the Check Engine light after fixing OBDII code P2138 on a 2008 Nissan Pathfinder?

- Yes, once the issue has been repaired, it is safe to reset the Check Engine light using a scan tool. This will clear the code and allow you to monitor the vehicle for any recurring problems.

8. Can a DIY enthusiast fix OBDII code P2138 on a 2008 Nissan Pathfinder?

- While some basic inspection and cleaning tasks can be done by a DIY enthusiast, diagnosing and repairing the root cause of the code may require professional knowledge and tools. It is recommended to consult a mechanic for complex issues.

9. Will OBDII code P2138 cause permanent damage to my 2008 Nissan Pathfinder if left unresolved?

- Ignoring OBDII code P2138 can potentially lead to further damage to the engine or drivetrain components over time. It is best to address the issue promptly to prevent any lasting damage.

10. How can I prevent OBDII code P2138 from recurring on my 2008 Nissan Pathfinder?

- To prevent the code from recurring, ensure regular maintenance of the accelerator pedal position sensor, throttle body, and related components. Keeping the vehicle in good condition and addressing any issues promptly can help prevent future occurrences of this code.

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