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Engine-Codes – Nissan – P2118 2012 Nissan Altima Sedan

P2118 2012 Nissan Altima Sedan Code - Throttle Control Motor Circuit Short Bank 1

Quick Answer

The P2118 code for a 2012 Nissan Altima Sedan indicates a problem with the throttle control motor circuit on bank 1. Common causes include Wiring issues such as shorts or breaks in the throttle control motor circuit, Faulty throttle control motor, Corrosion or loose connections in the wiring harness. 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
P2118 2012 Nissan Altima Sedan indicates Throttle Control Motor Circuit Short Bank 1.
Common causes
Common causes include Wiring issues such as shorts or breaks in the throttle control motor circuit, Faulty throttle control motor, Corrosion or loose connections in the wiring harness.
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 05, 2024
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Code P2118 2012 Nissan Altima Sedan Description

The P2118 code for a 2012 Nissan Altima Sedan indicates a problem with the throttle control motor circuit on bank 1. This code is typically triggered when there is a short circuit detected in the circuit that controls the throttle body motor. The throttle control motor is responsible for regulating the airflow into the engine, which is crucial for maintaining the proper air-fuel mixture for combustion. When this circuit is compromised, it can lead to issues with the vehicle's performance, including poor acceleration, stalling, and reduced fuel efficiency.

OBDII Code P2118 2012 Nissan Altima Sedan - Throttle Control Motor Circuit Short Bank 1
P2118 2012 Nissan Altima Sedan Code - Throttle Control Motor Circuit Short Bank 1

Common Causes of P2118 2012 Nissan Altima Sedan

  1. Wiring issues such as shorts or breaks in the throttle control motor circuit.
  2. Faulty throttle control motor.
  3. Corrosion or loose connections in the wiring harness.
  4. Issues with the throttle position sensor.
  5. Electronic control module (ECM) malfunction.

Symptoms of P2118 2012 Nissan Altima Sedan

  1. Engine hesitation or lack of response when pressing the accelerator pedal.
  2. Sudden loss of power while driving.
  3. Illumination of the Check Engine Light on the dashboard.
  4. Rough idling or erratic engine behavior.
  5. Difficulty maintaining a steady speed while driving.

How to Fix P2118 2012 Nissan Altima Sedan

  1. Begin by conducting a thorough inspection of the throttle control motor circuit to identify any damaged or corroded wiring.
  2. Test the throttle control motor and throttle position sensor for proper functionality using a multimeter.
  3. Replace any faulty components such as the throttle control motor, throttle position sensor, or ECM as needed.
  4. Clear the diagnostic trouble codes from the vehicle's computer and reset the system.
  5. Perform a test drive to ensure that the issue has been resolved and that the vehicle is operating smoothly.

Cost to Fix P2118 2012 Nissan Altima Sedan

The typical repair costs for addressing a P2118 code on a 2012 Nissan Altima Sedan can range from $200 to $500, depending on the specific components that need to be replaced and the labor involved. Keep in mind that these costs can vary based on location, the expertise of the mechanic, and whether genuine OEM parts are used. It's recommended to obtain quotes from different auto repair shops to find the best deal.

When is the Code Detected?

Engine Control Module (ECM) detects short in both circuits between ECM and throttle control motor.

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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 P2118 2012 Nissan Altima Sedan Code

1. What are the common symptoms of OBDII code P2118 on a 2012 Nissan Altima Sedan?

- Common symptoms include the vehicle going into "limp mode," reduced engine power, and the Check Engine light illuminating.

2. What does the OBDII code P2118 on a 2012 Nissan Altima Sedan indicate?

- The code P2118 indicates a potential issue with the Throttle Control Motor Circuit Short Bank 1.

3. What are the possible causes of OBDII code P2118 on a 2012 Nissan Altima Sedan?

- Possible causes include a faulty throttle control motor, damaged wiring or connectors in the circuit, or issues with the throttle position sensor.

4. How can I diagnose the Throttle Control Motor Circuit Short Bank 1 issue on my 2012 Nissan Altima Sedan?

- Diagnosis typically involves inspecting the throttle control motor, checking for damaged wiring, and testing the throttle position sensor using a multimeter.

5. Can I continue driving my 2012 Nissan Altima Sedan with the OBDII code P2118 present?

- It is not recommended to continue driving with the P2118 code active, as it can lead to drivability issues and potential safety hazards.

6. How can I repair the Throttle Control Motor Circuit Short Bank 1 problem on my 2012 Nissan Altima Sedan?

- Repair may involve replacing the throttle control motor, repairing damaged wiring, or replacing the throttle position sensor, depending on the exact cause of the issue.

7. Is it possible to reset the OBDII code P2118 on a 2012 Nissan Altima Sedan without fixing the underlying problem?

- While you can clear the code with an OBDII scanner, it is important to address the root cause of the issue to prevent it from reoccurring.

8. Can a DIY enthusiast fix the Throttle Control Motor Circuit Short Bank 1 problem on a 2012 Nissan Altima Sedan?

- Depending on the specific skills and tools available, some DIY enthusiasts may be able to address the issue themselves, but it is recommended to consult a professional if unsure.

9. How much does it typically cost to repair the Throttle Control Motor Circuit Short Bank 1 issue on a 2012 Nissan Altima Sedan?

- Repair costs can vary depending on the exact cause of the problem, but it may range from a few hundred to over a thousand dollars, including parts and labor.

10. Will fixing the Throttle Control Motor Circuit Short Bank 1 problem improve the performance of my 2012 Nissan Altima Sedan?

- Yes, addressing the P2118 code and repairing the throttle control motor circuit should help restore proper engine performance and throttle response in your vehicle.

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