AutoCodes – Nissan – U0140 2012 Nissan Sentra

U0140 2012 Nissan Sentra 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 2012 Nissan Sentra 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 3,509

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 2012 Nissan Sentra 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 2012 Nissan Sentra - Lost Communication With Body Control Module - AutoCodes.com — U0140 2012 Nissan Sentra Code - Lost Communication With Body Control Module

What does this mean?

What are the Possible Causes of the DTC U0140 2012 Nissan Sentra?

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 2012 Nissan Sentra?

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 2012 Nissan Sentra 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.

Need more information about the U0140 2012 Nissan Sentra code?

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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 2012 Nissan Sentra Code

1. What does the OBDII code U0140 on a 2012 Nissan Sentra mean?

- The code U0140 indicates a communication problem between the vehicle's powertrain control module (PCM) and the body control module (BCM).

2. What are some common symptoms of U0140 on a 2012 Nissan Sentra?

- Common symptoms include intermittent or complete loss of power windows, door locks, interior lights, and other body control functions.

3. What are the possible causes of the U0140 code on a 2012 Nissan Sentra?

- The U0140 code can be triggered by issues such as a faulty body control module, damaged wiring, loose connections, or a malfunctioning PCM.

4. How can I diagnose the U0140 code on my 2012 Nissan Sentra?

- Diagnosing the U0140 code typically involves using a diagnostic scanner to retrieve the specific error codes and testing the communication between the PCM and BCM.

5. Can I still drive my 2012 Nissan Sentra with the U0140 code?

- It is not recommended to drive the vehicle with the U0140 code active, as it can affect critical functions controlled by the body control module.

6. How can I repair the U0140 code on my 2012 Nissan Sentra?

- Repairing the U0140 code may involve inspecting and repairing any damaged wiring, checking and resetting connections, or replacing the body control module if necessary.

7. Can a DIY enthusiast fix the U0140 code on a 2012 Nissan Sentra?

- While some basic troubleshooting steps can be performed by a DIY enthusiast, diagnosing and repairing the U0140 code may require professional tools and expertise.

8. Are there any recalls related to the U0140 code on the 2012 Nissan Sentra?

- It is advisable to check with Nissan or the National Highway Traffic Safety Administration (NHTSA) for any recalls related to the U0140 code on the 2012 Sentra.

9. How much does it cost to repair the U0140 code on a 2012 Nissan Sentra?

- The cost of repairing the U0140 code can vary depending on the specific issue, parts needed for replacement, and labor costs at a dealership or repair shop.

10. How can I prevent the U0140 code from recurring on my 2012 Nissan Sentra?

- Regular maintenance checks, ensuring proper electrical connections, and addressing any warning signs promptly can help prevent the U0140 code from recurring.