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U0140 2010 Nissan Altima Sedan Code - Lost Communication With Body Control Module

Quick Answer

The U0140 diagnostic trouble code (DTC) for a 2010 Nissan Altima Sedan indicates that there is a communication problem between the Engine Control Module (ECM) and the Body Control Module (BCM). Common causes include Faulty wiring or connectors between the ECM and BCM, Corrosion or damage to the communication bus lines, Software or firmware issues within the BCM. 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 2010 Nissan Altima Sedan indicates Lost Communication With Body Control Module.
Common causes
Common causes include Faulty wiring or connectors between the ECM and BCM, Corrosion or damage to the communication bus lines, Software or firmware issues within the BCM.
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 11, 2024
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Code U0140 2010 Nissan Altima Sedan Description

The U0140 diagnostic trouble code (DTC) for a 2010 Nissan Altima Sedan indicates that there is a communication problem between the Engine Control Module (ECM) and the Body Control Module (BCM). The Body Control Module is responsible for various functions related to the vehicle's body systems, such as the interior lights, power windows, door locks, and other accessories. When communication is lost between the ECM and BCM, it can lead to issues with the vehicle's overall performance and functionality.

OBDII Code U0140 2010 Nissan Altima Sedan - Lost Communication With Body Control Module
U0140 2010 Nissan Altima Sedan Code - Lost Communication With Body Control Module

Common Causes of U0140 2010 Nissan Altima Sedan

  1. Faulty wiring or connectors between the ECM and BCM
  2. Corrosion or damage to the communication bus lines
  3. Software or firmware issues within the BCM
  4. ECM or BCM failure
  5. Electrical issues such as a drained battery or alternator problems

Symptoms of U0140 2010 Nissan Altima Sedan

  1. Interior lights not working properly
  2. Power windows or door locks malfunctioning
  3. Issues with the remote keyless entry system
  4. Malfunction of the windshield wipers
  5. Inoperative turn signals or hazard lights

How to Fix U0140 2010 Nissan Altima Sedan

  1. Begin by performing a thorough inspection of the wiring harness and connectors between the ECM and BCM to check for any visible damage or corrosion.
  2. Use a scan tool to diagnose the specific communication issue and identify which module is not transmitting or receiving signals correctly.
  3. Check for any software updates or reprogramming that may be available for the BCM to resolve communication issues.
  4. If necessary, replace the faulty ECM or BCM to restore proper communication between the modules.
  5. Clear the DTC and perform a test drive to ensure that the issue has been successfully resolved.

Cost to Fix U0140 2010 Nissan Altima Sedan

The cost of repairing a U0140 code on a 2010 Nissan Altima Sedan can vary depending on the specific issue causing the communication failure. On average, the repair costs for this type of problem can range from $200 to $600, including parts and labor. However, it is essential to note that the actual repair costs may be higher if significant component replacement is required. Additionally, diagnostic time and labor rates at auto repair shops can fluctuate based on various factors, so it is advisable to obtain quotes from different shops to determine the most cost-effective solution for your specific vehicle.

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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 2010 Nissan Altima Sedan Code

1. What are the common symptoms of OBDII code U0140 (Lost Communication With Body Control Module) in a 2010 Nissan Altima Sedan?

- Common symptoms include issues with power windows, door locks, interior lights, and other body control functions not working properly.

2. What are the possible causes of U0140 code in a 2010 Nissan Altima Sedan?

- The code U0140 typically indicates a communication problem between the vehicle's main computer and the Body Control Module, which can be caused by wiring issues, a faulty Body Control Module, or a problem with the main computer itself.

3. How can I diagnose the U0140 code in my 2010 Nissan Altima Sedan?

- Diagnosing the U0140 code usually involves checking the wiring connections between the main computer and the Body Control Module, testing the voltage and continuity of the circuits, and using a diagnostic scanner to retrieve specific error codes and data related to the communication issue.

4. Can I still drive my 2010 Nissan Altima Sedan with the U0140 code present?

- It is not recommended to drive the vehicle with the U0140 code present, as it can lead to further electrical issues and potential safety concerns due to the loss of communication with the Body Control Module.

5. How can I repair the U0140 code in my 2010 Nissan Altima Sedan?

- Repairing the U0140 code may involve fixing any wiring issues, replacing the Body Control Module if it is faulty, or reprogramming the modules to restore communication between the main computer and the Body Control Module.

6. Is it possible to reset the U0140 code in a 2010 Nissan Altima Sedan without fixing the underlying issue?

- Resetting the code without addressing the underlying communication problem is not recommended, as the issue will likely persist and may lead to more severe electrical problems in the future.

7. Can a DIY enthusiast fix the U0140 code in a 2010 Nissan Altima Sedan?

- While some basic troubleshooting steps can be taken by DIY enthusiasts, diagnosing and repairing the U0140 code often requires specialized tools, technical knowledge, and expertise, so it is recommended to consult a professional mechanic for proper diagnosis and repair.

8. How much does it typically cost to repair the U0140 code in a 2010 Nissan Altima Sedan at a dealership or repair shop?

- The cost of repairing the U0140 code can vary depending on the specific cause of the communication issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.

9. Are there any preventive maintenance measures I can take to avoid the U0140 code in my 2010 Nissan Altima Sedan?

- To prevent the U0140 code from occurring, it is essential to regularly inspect the wiring harness, connectors, and modules for any signs of wear or damage, and address any issues promptly to ensure proper communication between the main computer and the Body Control Module.

10. How long does it typically take to repair the U0140 code in a 2010 Nissan Altima Sedan?

- The repair time for the U0140 code can vary depending on the specific cause of the issue, the availability of parts, and the expertise of the mechanic, but it may take anywhere from a few hours to a full day to diagnose and repair the problem.

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