AutoCodes – Nissan – U0140 2010 Nissan Altima Sedan

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

Quick Answer

The Controller Area Network (CAN) is a serial communication line for real time applications. Common causes include CAN communication line between Body Control Module (BCM) and Engine Control Module (ECM), Faulty Body Control Module (BCM), Body Control Module (BCM) harness is open or shorted. 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 CAN communication line between Body Control Module (BCM) and Engine Control Module (ECM), Faulty Body Control Module (BCM), Body Control Module (BCM) harness is open or shorted.
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 3,255

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Apr 01, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U0140 2010 Nissan Altima Sedan Description

The Controller Area Network (CAN) is a serial communication line for real time applications. It is an on-vehicle multiplex communication line with high data communication speed and excellent error detection ability. Many electronic control units are equipped onto a vehicle, and each control unit shares information and links with other control units during operation (not independent). In CAN communication, control units are connected with 2 communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives data but selectively reads the required data only. The Diagnostic Trouble Code (DTC) sets when the Engine Control Module (ECM) is not transmitting or receiving CAN communication signal of OBDII (emission related diagnosis) with Body Control Module (BCM) for 2 seconds or more.

OBDII Code U0140 2010 Nissan Altima Sedan - Lost Communication With Body Control Module - AutoCodes.com — U0140 2010 Nissan Altima Sedan Code - Lost Communication With Body Control Module

What does this mean?

What are the Possible Causes of the DTC U0140 2010 Nissan Altima Sedan?

CAN communication line between Body Control Module (BCM) and Engine Control Module (ECM)
Faulty Body Control Module (BCM)
Body Control Module (BCM) harness is open or shorted
Body Control Module (BCM) circuit poor electrical connection

How to Fix the DTC U0140 2010 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 U0140 2010 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.

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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.