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P2138 2003 Infiniti G35 Code - Accelerator Pedal Position Sensor Circuit Range/Performance

Quick Answer

The P2138 diagnostic trouble code (DTC) for a 2003 Infiniti G35 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 sensor circuit, Corrosion or contamination in the sensor connections. 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 2003 Infiniti G35 indicates Accelerator Pedal Position Sensor Circuit Range/Performance.
Common causes
Common causes include Faulty accelerator pedal position sensor, Wiring or connector issues in the sensor circuit, Corrosion or contamination in the sensor connections.
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 15, 2024
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Code P2138 2003 Infiniti G35 Description

The P2138 diagnostic trouble code (DTC) for a 2003 Infiniti G35 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. The accelerator pedal position sensor is a vital component that communicates the position of the accelerator pedal to the ECM, allowing it to adjust the throttle accordingly. When this sensor malfunctions, it can lead to a variety of performance issues and potentially dangerous driving conditions.

OBDII Code P2138 2003 Infiniti G35 - Accelerator Pedal Position Sensor Circuit Range/Performance
P2138 2003 Infiniti G35 Code - Accelerator Pedal Position Sensor Circuit Range/Performance

Common Causes of P2138 2003 Infiniti G35

  1. Faulty accelerator pedal position sensor
  2. Wiring or connector issues in the sensor circuit
  3. Corrosion or contamination in the sensor connections
  4. ECM software or hardware problems
  5. Mechanical issues with the accelerator pedal assembly

Symptoms of P2138 2003 Infiniti G35

  1. Reduced engine power
  2. Hesitation or lack of response when pressing the accelerator pedal
  3. Sudden acceleration or surging while driving
  4. Engine stalling or difficulty starting
  5. Illumination of the Check Engine Light

How to Fix P2138 2003 Infiniti G35

  1. Begin by diagnosing the issue using a scan tool to retrieve the specific trouble code and confirm the accelerator pedal position sensor as the root cause.
  2. Inspect the wiring and connectors related to the sensor for any damage, corrosion, or loose connections. Repair or replace as necessary.
  3. Test the accelerator pedal position sensor using a multimeter to check for proper voltage output and resistance values.
  4. If the sensor is found to be faulty, replace it with a new OEM or high-quality aftermarket sensor.
  5. Clear the DTC and perform a test drive to ensure the issue has been resolved and the Check Engine Light does not reappear.

Cost to Fix P2138 2003 Infiniti G35

The cost of repairing a P2138 code on a 2003 Infiniti G35 can vary depending on the specific cause of the issue and the labor rates in your area. Typically, the cost of a new accelerator pedal position sensor ranges from $50 to $150, while labor costs can range from $100 to $300. Overall, the total repair cost for this issue may fall between $150 and $450. It is advisable to consult with a trusted mechanic or auto repair shop to get an accurate estimate based on your vehicle's specific needs and location. Keep in mind that diagnostic time and labor rates can vary, so it's essential to inquire about these factors 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 2003 Infiniti G35 Code

1. What are common symptoms of OBDII code P2138 in a 2003 Infiniti G35?

- Common symptoms include reduced engine power, hesitation or lack of response when pressing the accelerator pedal, and the vehicle going into "limp mode."

2. What causes the OBDII code P2138 in a 2003 Infiniti G35?

- The code P2138 typically indicates a fault with the accelerator pedal position sensor or its circuit, which could be caused by a faulty sensor, wiring issues, or a poor electrical connection.

3. How can I diagnose the issue causing the OBDII code P2138 in my 2003 Infiniti G35?

- Diagnostic steps may include checking the wiring and connections related to the accelerator pedal position sensor, testing the sensor itself for proper functionality, and using a scan tool to monitor sensor readings.

4. Is it safe to continue driving my 2003 Infiniti G35 with the OBDII code P2138 present?

- It is not recommended to drive the vehicle with the code P2138 active, as it can lead to unpredictable acceleration and potentially unsafe driving conditions.

5. Can I reset the OBDII code P2138 in my 2003 Infiniti G35 by disconnecting the battery?

- While disconnecting the battery may temporarily clear the code, it is essential to diagnose and repair the underlying issue causing the code to prevent it from reoccurring.

6. How much does it typically cost to repair the OBDII code P2138 in a 2003 Infiniti G35?

- The cost of repairing the code P2138 can vary depending on the specific cause of the issue, but it may involve replacing the accelerator pedal position sensor or addressing wiring problems.

7. Are there any DIY repair tips for fixing the OBDII code P2138 in a 2003 Infiniti G35?

- DIY repair tips may include carefully inspecting the sensor wiring for damage, ensuring proper connections, and following manufacturer-specific diagnostic procedures outlined in the repair manual.

8. Can a faulty accelerator pedal position sensor cause other issues besides triggering the OBDII code P2138 in a 2003 Infiniti G35?

- Yes, a faulty accelerator pedal position sensor can also cause issues such as poor throttle response, erratic idle, and difficulty maintaining consistent speed while driving.

9. How long does it typically take to repair the OBDII code P2138 in a 2003 Infiniti G35?

- The repair time can vary depending on the extent of the issue and the availability of parts, but it may take a few hours to a full day to diagnose and fix the problem.

10. Is it advisable to take my 2003 Infiniti G35 to a professional mechanic for the OBDII code P2138 repair?

- Due to the complexity of diagnosing and repairing issues related to the accelerator pedal position sensor circuit, it is advisable to seek assistance from a qualified mechanic with experience working on Infiniti vehicles.

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