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U0140 2011 Nissan Altima Sedan Code - Lost Communication With Body Control Module

Quick Answer

The U0140 diagnostic trouble code (DTC) for a 2011 Nissan Altima Sedan indicates that there is a communication problem between the vehicle's engine control module (ECM) and the body control module (BCM). Common causes include Faulty wiring or loose connections between the ECM and BCM, Malfunctioning body control module (BCM), Malfunctioning 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
U0140 2011 Nissan Altima Sedan indicates Lost Communication With Body Control Module.
Common causes
Common causes include Faulty wiring or loose connections between the ECM and BCM, Malfunctioning body control module (BCM), Malfunctioning 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 12, 2024
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Code U0140 2011 Nissan Altima Sedan Description

The U0140 diagnostic trouble code (DTC) for a 2011 Nissan Altima Sedan indicates that there is a communication problem between the vehicle's engine control module (ECM) and the body control module (BCM). The body control module is responsible for managing various functions related to the vehicle's body systems, such as lighting, power windows, door locks, and other convenience features. When communication is lost between the ECM and BCM, it can lead to a range of issues affecting the vehicle's performance and functionality.

OBDII Code U0140 2011 Nissan Altima Sedan - Lost Communication With Body Control Module
U0140 2011 Nissan Altima Sedan Code - Lost Communication With Body Control Module

Common Causes of U0140 2011 Nissan Altima Sedan

  1. Faulty wiring or loose connections between the ECM and BCM
  2. Malfunctioning body control module (BCM)
  3. Malfunctioning engine control module (ECM)
  4. Corrosion or damage to the communication network components
  5. Software issues or programming errors within the modules

Symptoms of U0140 2011 Nissan Altima Sedan

  1. Non-functioning power windows
  2. Inoperative interior lights
  3. Malfunctioning door locks
  4. Issues with the exterior lighting system
  5. Intermittent stalling or failure to start

How to Fix U0140 2011 Nissan Altima Sedan

  1. Perform a thorough inspection of the wiring harness and connectors between the ECM and BCM to check for any damage or loose connections.
  2. Test the body control module (BCM) and engine control module (ECM) for proper functionality and communication.
  3. Clear the DTC and reset the system to see if the code reappears, indicating a persistent issue.
  4. If necessary, replace the faulty BCM or ECM with a new unit and reprogram it to ensure proper communication and functionality.
  5. Conduct a final test drive to confirm that the communication between the modules has been restored and that all affected systems are functioning correctly.

Cost to Fix U0140 2011 Nissan Altima Sedan

The typical repair costs for addressing the U0140 code on a 2011 Nissan Altima Sedan can vary depending on the specific cause of the communication issue. In general, the cost of parts such as a new BCM or ECM can range from $200 to $600, while labor costs for diagnosis and repair can add another $100 to $300 to the total bill. Overall, the total repair cost for resolving the U0140 code may range from $300 to $900, including parts and labor.

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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 U0140 2011 Nissan Altima Sedan Code

1. What are the common symptoms of OBDII code U0140 in a 2011 Nissan Altima Sedan?

- Common symptoms include dashboard warning lights, loss of communication with various vehicle systems, and issues with power door locks or windows.

2. What does the OBDII code U0140 indicate in a 2011 Nissan Altima Sedan?

- The code U0140 indicates that there is a communication problem between the engine control module (ECM) and the body control module (BCM).

3. What are the possible causes of the U0140 code in a 2011 Nissan Altima Sedan?

- Common causes include damaged wiring, loose connections, a faulty BCM, ECM issues, or a software glitch.

4. How can I diagnose the U0140 code in my 2011 Nissan Altima Sedan?

- Diagnose the code by checking the wiring and connections between the ECM and BCM, inspecting for physical damage, and using a scan tool to monitor communication between modules.

5. Can I drive my 2011 Nissan Altima Sedan with the U0140 code?

- It is not recommended to drive the vehicle with the U0140 code present, as it can lead to potential safety hazards and further damage.

6. How can I repair the U0140 code in my 2011 Nissan Altima Sedan?

- Repair steps may include repairing or replacing damaged wiring, ensuring secure connections, resetting the ECM and BCM, or seeking assistance from a professional mechanic.

7. Is it possible to reset the U0140 code in a 2011 Nissan Altima Sedan?

- Yes, the code can be reset using an OBDII scanner or by disconnecting the car's battery for a few minutes.

8. Will the U0140 code cause permanent damage to my 2011 Nissan Altima Sedan?

- If left unaddressed, the U0140 code can potentially cause further damage to the vehicle's electronic systems, so it is important to diagnose and repair the issue promptly.

9. Can a DIY enthusiast fix the U0140 code in a 2011 Nissan Altima Sedan?

- Depending on the skill level and experience, a DIY enthusiast may be able to address simple causes of the U0140 code, such as checking and securing connections.

10. How much does it cost to repair the U0140 code in a 2011 Nissan Altima Sedan?

- The cost of repairing the U0140 code can vary depending on the cause of the issue, with potential expenses including parts, labor, and diagnostic fees.

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