AutoCodes – Nissan – P2138 2008 Nissan Pathfinder

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

Quick Answer

The Accelerator Pedal Position (APP) sensor is installed on the upper end of the accelerator pedal assembly. 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 2008 Nissan Pathfinder indicates Accelerator Pedal Position Sensor Circuit Range/Performance.
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 3,123

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

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 2008 Nissan Pathfinder Description

The Accelerator Pedal Position (APP) sensor is installed on the upper end of the accelerator pedal assembly. The sensor detects the accelerator position and sends a signal to the Engine Control Module (ECM).
Accelerator pedal position sensor has two sensors. These sensors are a kind of potentiometers which transform the accelerator pedal position into output voltage, and emit the voltage signal to the ECM.
In addition, these sensors detect the opening and closing speed of the accelerator pedal and feed the voltage signals to the ECM. The ECM judges the current opening angle of the accelerator pedal from these signals and controls the throttle control motor based on these signals.
Idle position of the accelerator pedal is determined by the ECM receiving the signal from the accelerator pedal position sensor. The ECM uses this signal for the engine operation
such as fuel cut.

OBDII Code P2138 2008 Nissan Pathfinder - Accelerator Pedal Position Sensor Circuit Range/Performance - AutoCodes.com — P2138 2008 Nissan Pathfinder Code - Accelerator Pedal Position Sensor Circuit Range/Performance

What does this mean?

What are the Possible Causes of the DTC P2138 2008 Nissan Pathfinder?

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 2008 Nissan Pathfinder?

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 2008 Nissan Pathfinder 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 2008 Nissan Pathfinder code?

Need more information on how to fix the P2138 2008 Nissan Pathfinder code? Get Access to Factory Service Manuals

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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.