AutoCodes – Nissan – U0140 2011 Nissan Altima Sedan

U0140 2011 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 2011 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 2,786

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 2011 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 2011 Nissan Altima Sedan - Lost Communication With Body Control Module - AutoCodes.com — U0140 2011 Nissan Altima Sedan Code - Lost Communication With Body Control Module

What does this mean?

What are the Possible Causes of the DTC U0140 2011 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 2011 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 2011 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 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.