AutoCodes – Infiniti – P2138 2005 Infiniti G35

P2138 2005 Infiniti G35 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 2005 Infiniti G35 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 3,978

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 2005 Infiniti G35 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 2005 Infiniti G35 - Accelerator Pedal Position Sensor Circuit Range/Performance - AutoCodes.com — P2138 2005 Infiniti G35 Code - Accelerator Pedal Position Sensor Circuit Range/Performance

What does this mean?

What are the Possible Causes of the DTC P2138 2005 Infiniti G35?

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 2005 Infiniti G35?

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 2005 Infiniti G35 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 2005 Infiniti G35 code?

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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.