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P2138 2005 Infiniti G35 Code - Accelerator Pedal Position Sensor Circuit Range/Performance

Quick Answer

The P2138 code on a 2005 Infiniti G35 indicates a problem with the Accelerator Pedal Position Sensor Circuit Range/Performance. Common causes include Faulty accelerator pedal position sensor, Damaged or corroded wiring in the sensor circuit, Issues with the ECM communication. 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 2005 Infiniti G35 indicates Accelerator Pedal Position Sensor Circuit Range/Performance.
Common causes
Common causes include Faulty accelerator pedal position sensor, Damaged or corroded wiring in the sensor circuit, Issues with the ECM communication.
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 2005 Infiniti G35 Description

The P2138 code on a 2005 Infiniti G35 indicates a problem with the Accelerator Pedal Position Sensor Circuit Range/Performance. This sensor is responsible for communicating the position of the accelerator pedal to the Engine Control Module (ECM), which in turn adjusts fuel and air intake to control the vehicle's speed and performance. When this sensor circuit is not functioning within the expected range or performance parameters, it can lead to issues with acceleration, fuel efficiency, and overall drivability of the vehicle.

OBDII Code P2138 2005 Infiniti G35 - Accelerator Pedal Position Sensor Circuit Range/Performance
P2138 2005 Infiniti G35 Code - Accelerator Pedal Position Sensor Circuit Range/Performance

Common Causes of P2138 2005 Infiniti G35

  1. Faulty accelerator pedal position sensor
  2. Damaged or corroded wiring in the sensor circuit
  3. Issues with the ECM communication
  4. Water damage or exposure to moisture in the sensor area
  5. Poor electrical connection or grounding in the sensor circuit

Symptoms of P2138 2005 Infiniti G35

  1. Reduced acceleration or lack of response when pressing the accelerator pedal
  2. Engine stalling or hesitation during acceleration
  3. Illumination of the Check Engine Light on the dashboard
  4. Rough idling or uneven engine performance
  5. Decreased fuel efficiency

How to Fix P2138 2005 Infiniti G35

  1. Begin by conducting a thorough diagnostic scan of the vehicle to confirm the P2138 code and identify the specific cause of the issue.
  2. Inspect the accelerator pedal position sensor and associated wiring for any signs of damage or corrosion. Replace the sensor if necessary.
  3. Check the ECM for any communication errors or malfunctions. Reset or reprogram the ECM as needed.
  4. Clear the error code from the system and perform a test drive to ensure the issue has been resolved.
  5. If the problem persists, consult with a professional mechanic or dealership for further troubleshooting and repairs.

Cost to Fix P2138 2005 Infiniti G35

The typical repair costs for addressing the P2138 code on a 2005 Infiniti G35 can range from $200 to $500, including parts and labor. However, it is important to note that specific diagnosis time and labor rates at auto repair shops can vary significantly. Rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less. It is advisable to obtain quotes from multiple sources and compare prices to get a more accurate estimate for your specific situation.

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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 2005 Infiniti G35 Code

1. What are the common symptoms of OBDII code P2138 in a 2005 Infiniti G35?

Common symptoms include reduced engine power, hesitation or stalling when accelerating, and the vehicle going into "limp mode."

2. What does the OBDII code P2138 indicate in a 2005 Infiniti G35?

OBDII code P2138 indicates an issue with the Accelerator Pedal Position Sensor Circuit Range/Performance in the vehicle.

3. What are the possible causes of OBDII code P2138 in a 2005 Infiniti G35?

Possible causes include a faulty accelerator pedal position sensor, issues with the throttle position sensor, wiring or connector problems, or a malfunctioning Engine Control Module (ECM).

4. How can I diagnose the OBDII code P2138 in my 2005 Infiniti G35?

Diagnosing the code typically involves using a scan tool to check for any related trouble codes, testing the accelerator pedal position sensor and throttle position sensor, inspecting wiring and connectors for damage, and checking the ECM for proper functioning.

5. Can I still drive my 2005 Infiniti G35 with OBDII code P2138?

It is not recommended to drive the vehicle with code P2138 as it can result in safety hazards due to reduced engine power and potential stalling. It is best to have the issue diagnosed and repaired promptly.

6. How can I repair OBDII code P2138 in my 2005 Infiniti G35?

Repairing the code may involve replacing the accelerator pedal position sensor, throttle position sensor, repairing or replacing damaged wiring or connectors, or reprogramming the ECM. It is advisable to consult a professional mechanic for accurate diagnosis and repairs.

7. Can a DIY enthusiast fix OBDII code P2138 in a 2005 Infiniti G35?

While some minor repairs like checking and cleaning connectors can be done by a DIY enthusiast, diagnosing and repairing the root cause of code P2138 may require specialized tools and expertise. It is recommended to seek professional help for accurate diagnosis and repairs.

8. Will resetting the OBDII code P2138 in my 2005 Infiniti G35 make it go away permanently?

Simply resetting the code without addressing the underlying issue will not make it go away permanently. The root cause of the problem needs to be diagnosed and repaired to prevent the code from reoccurring.

9. How much does it typically cost to repair OBDII code P2138 in a 2005 Infiniti G35?

The cost of repairing code P2138 can vary depending on the specific issue causing it, the labor rates of the repair shop, and the cost of parts needed for the repair. It is recommended to obtain quotes from reputable mechanics for an accurate estimate.

10. Is OBDII code P2138 a common issue in 2005 Infiniti G35 vehicles?

While not extremely common, OBDII code P2138 can occur in 2005 Infiniti G35 vehicles due to various factors such as sensor failures, wiring issues, or ECM malfunctions. Regular maintenance and prompt repairs can help prevent this code from occurring.

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