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Engine-Codes – Nissan – P2118 2009 Nissan Altima Sedan

P2118 2009 Nissan Altima Sedan Code - Throttle Control Motor Circuit Short Bank 1

Quick Answer

The P2118 diagnostic trouble code (DTC) in a 2009 Nissan Altima Sedan indicates a problem with the Throttle Control Motor Circuit on Bank 1. Common causes include Damaged wiring or connectors in the throttle control motor circuit, A faulty throttle control motor, Issues with the engine control module (ECM). 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 2009 Nissan Altima Sedan indicates Throttle Control Motor Circuit Short Bank 1.
Common causes
Common causes include Damaged wiring or connectors in the throttle control motor circuit, A faulty throttle control motor, Issues with the engine control module (ECM).
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 17, 2024
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Code P2118 2009 Nissan Altima Sedan Description

The P2118 diagnostic trouble code (DTC) in a 2009 Nissan Altima Sedan indicates a problem with the Throttle Control Motor Circuit on Bank 1. This code specifically points to a short circuit in the throttle control motor circuit, which is responsible for controlling the opening and closing of the throttle valve. The throttle control motor is a crucial component of the electronic throttle control system, which regulates the engine's air intake and ultimately controls the vehicle's speed and performance.

OBDII Code P2118 2009 Nissan Altima Sedan - Throttle Control Motor Circuit Short Bank 1
P2118 2009 Nissan Altima Sedan Code - Throttle Control Motor Circuit Short Bank 1

Common Causes of P2118 2009 Nissan Altima Sedan

  1. Damaged wiring or connectors in the throttle control motor circuit.
  2. A faulty throttle control motor.
  3. Issues with the engine control module (ECM).
  4. Corrosion or contamination in the throttle control system.
  5. Electrical interference or short circuits in the system.

Symptoms of P2118 2009 Nissan Altima Sedan

  1. Erratic acceleration or lack of response when pressing the gas pedal.
  2. Engine stalling or difficulty starting the vehicle.
  3. Reduced power and poor acceleration.
  4. Check Engine Light illuminated on the dashboard.
  5. Vehicle going into "limp mode" to protect the engine.

How to Fix P2118 2009 Nissan Altima Sedan

  1. Begin by conducting a thorough inspection of the throttle control motor circuit, checking for any visible damage to wiring or connectors.
  2. Test the throttle control motor and its connections using a multimeter to determine if it is functioning correctly.
  3. If the throttle control motor is faulty, replace it with a new unit and ensure proper calibration.
  4. Check and clean the throttle body and throttle plate to remove any debris or buildup that may be affecting performance.
  5. Clear the DTC and perform a test drive to verify that the issue has been resolved and that the vehicle is operating normally.

Cost to Fix P2118 2009 Nissan Altima Sedan

The typical repair costs for addressing a P2118 code in a 2009 Nissan Altima Sedan can vary depending on the specific cause of the issue and the extent of the repairs needed. In general, replacing a faulty throttle control motor can cost between $200 and $500, including parts and labor. Additional costs may be incurred for diagnostic testing, cleaning the throttle body, or addressing any other related issues. It's important to note that labor rates at auto repair shops can vary, with hourly rates typically ranging from $80 to $150. For a more accurate estimate, it is recommended to consult with a local auto repair shop.

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 2009 Nissan Altima Sedan Code

1. What are the common symptoms of OBDII code P2118 in a 2009 Nissan Altima Sedan?

The common symptoms of OBDII code P2118 include a Check Engine Light (CEL) illuminated on the dashboard, reduced engine power, and potential difficulty accelerating.

2. What does the OBDII code P2118 for a 2009 Nissan Altima Sedan indicate?

OBDII code P2118 indicates a throttle control motor circuit short in Bank 1 of the vehicle's engine.

3. What are the possible causes of OBDII code P2118 in a 2009 Nissan Altima Sedan?

Possible causes of OBDII code P2118 include a faulty throttle control motor, damaged wiring or connectors in the throttle control circuit, or a malfunctioning Engine Control Module (ECM).

4. How can I diagnose the OBDII code P2118 in my 2009 Nissan Altima Sedan?

Diagnosing OBDII code P2118 involves using an OBDII scanner to retrieve the code and then inspecting the throttle control motor, wiring, and connectors for any visible damage or issues.

5. Can I drive my 2009 Nissan Altima Sedan with OBDII code P2118?

It is not recommended to drive your 2009 Nissan Altima Sedan with OBDII code P2118, as it can lead to further damage to the engine and affect the vehicle's performance.

6. How can I repair OBDII code P2118 in my 2009 Nissan Altima Sedan?

Repairing OBDII code P2118 may involve replacing the throttle control motor, repairing any damaged wiring or connectors, or reprogramming the Engine Control Module (ECM) to resolve the issue.

7. Is it safe to reset the OBDII code P2118 in my 2009 Nissan Altima Sedan?

Resetting the OBDII code P2118 may temporarily turn off the Check Engine Light, but it is important to diagnose and repair the underlying issue causing the code to prevent further problems.

8. What are some tips for preventing OBDII code P2118 in a 2009 Nissan Altima Sedan?

To prevent OBDII code P2118, it is recommended to regularly maintain your vehicle, inspect the throttle control system for any signs of wear or damage, and address any issues promptly.

9. How long does it take to repair OBDII code P2118 in a 2009 Nissan Altima Sedan?

The repair time for OBDII code P2118 can vary depending on the exact cause of the issue, but it typically takes a few hours to a day to diagnose and repair the problem.

10. Can I fix OBDII code P2118 in my 2009 Nissan Altima Sedan myself?

While some DIY enthusiasts may be able to diagnose and repair OBDII code P2118 themselves, it is recommended to consult a professional mechanic for accurate diagnosis and proper repair to ensure the issue is resolved correctly.

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