AutoCodes – Nissan – P2138 2009 Nissan Altima Sedan

P2138 2009 Nissan Altima Sedan 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 2009 Nissan Altima Sedan 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 4,426

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 2009 Nissan Altima Sedan 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 2009 Nissan Altima Sedan - Accelerator Pedal Position Sensor Circuit Range/Performance - AutoCodes.com — P2138 2009 Nissan Altima Sedan Code - Accelerator Pedal Position Sensor Circuit Range/Performance

What does this mean?

What are the Possible Causes of the DTC P2138 2009 Nissan Altima Sedan?

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 2009 Nissan Altima Sedan?

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 2009 Nissan Altima Sedan 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 2009 Nissan Altima Sedan 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 2009 Nissan Altima Sedan Code

1. What are the common symptoms of OBDII code P2138 in a 2009 Nissan Altima Sedan?

- Common symptoms include reduced engine power, acceleration hesitation, stalling, and illuminated Check Engine Light.

2. What can cause the OBDII code P2138 in a 2009 Nissan Altima Sedan?

- The code is usually triggered by a faulty accelerator pedal position sensor or throttle position sensor, wiring issues, or a damaged connector.

3. How can I diagnose the OBDII code P2138 in my 2009 Nissan Altima Sedan?

- Diagnosis typically involves checking the accelerator pedal position sensor and throttle position sensor readings using a scan tool, as well as inspecting the wiring and connectors for any visible damage.

4. What are the potential repair options for OBDII code P2138 in a 2009 Nissan Altima Sedan?

- Repair options may include replacing the accelerator pedal position sensor, throttle position sensor, repairing any damaged wiring or connectors, and reprogramming the vehicle's computer.

5. Can I drive my 2009 Nissan Altima Sedan with the OBDII code P2138 present?

- It is not recommended to drive the vehicle with this code present as it can lead to performance issues and potential safety hazards. It is best to address the issue promptly.

6. How much does it typically cost to repair OBDII code P2138 in a 2009 Nissan Altima Sedan?

- The cost of repairs can vary depending on the specific cause of the code and the labor rates in your area. It is advisable to get a diagnostic from a professional to determine the exact repair cost.

7. Will resetting the Check Engine Light clear the OBDII code P2138 in a 2009 Nissan Altima Sedan?

- Resetting the Check Engine Light may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to reappear. It is important to diagnose and repair the root cause of the problem.

8. Can a DIY enthusiast fix the OBDII code P2138 in a 2009 Nissan Altima Sedan?

- Depending on the individual's skill level and access to tools, some DIY enthusiasts may be able to address this code by replacing the sensors or checking for wiring issues. However, it is recommended to seek professional help if unsure.

9. How long does it take to repair OBDII code P2138 in a 2009 Nissan Altima Sedan?

- The repair time can vary based on the exact cause of the code and the complexity of the repair. It may take anywhere from a couple of hours to a full day, so it is best to consult with a mechanic for a more accurate estimate.

10. Are there any recalls or technical service bulletins related to OBDII code P2138 in a 2009 Nissan Altima Sedan?

- It is advisable to check with the manufacturer or a dealership to see if there are any recalls or technical service bulletins related to this specific OBDII code for your vehicle model and year.