AutoCodes – Nissan – U0140 2010 Nissan Sentra

U0140 2010 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 2010 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 3,452

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code U0140 2010 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 2010 Nissan Sentra - Lost Communication With Body Control Module - AutoCodes.com — U0140 2010 Nissan Sentra Code - Lost Communication With Body Control Module

What does this mean?

What are the Possible Causes of the DTC U0140 2010 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 2010 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 2010 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 2010 Nissan Sentra code?

Need more information on how to fix the U0140 2010 Nissan Sentra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U0140 2010 Nissan Sentra code diagnosed by a professional: Find a repair shop in your area

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 Sentra Code

1. What does the OBDII code U0140 mean for a 2010 Nissan Sentra?

U0140 indicates that there is a lost communication with the Body Control Module (BCM) in the vehicle.

2. What are common symptoms of a U0140 code in a Nissan Sentra?

Common symptoms include loss of certain electrical functions like power windows, door locks, interior lights, or issues with the instrument cluster.

3. What are possible causes of a U0140 code in a 2010 Nissan Sentra?

Potential causes include damaged wiring or connectors, a faulty BCM, a weak battery, or software issues.

4. How can I diagnose a U0140 code in my Nissan Sentra?

Diagnosing a U0140 code typically involves checking the wiring and connectors related to the BCM, testing the battery voltage, and using a scan tool to communicate with the BCM.

5. Can I drive my Nissan Sentra with a U0140 code?

It is not recommended to drive your vehicle with a U0140 code, as it may lead to further electrical problems and safety issues.

6. How can I repair a U0140 code in my Nissan Sentra?

Repairs may involve fixing or replacing damaged wiring, connectors, or the BCM itself. It is recommended to consult a professional mechanic for accurate diagnosis and repair.

7. Is it possible to reset a U0140 code in a Nissan Sentra?

Resetting the code may temporarily clear the fault, but if the underlying issue is not addressed, the code is likely to return.

8. How much does it cost to fix a U0140 code in a 2010 Nissan Sentra?

The cost of fixing a U0140 code can vary depending on the specific cause of the issue, parts needed for repair, and labor costs involved. It's best to get a diagnosis from a mechanic for an accurate estimate.

9. Can a U0140 code in a Nissan Sentra be a DIY repair?

While some basic troubleshooting steps can be done by DIY enthusiasts, diagnosing and repairing a U0140 code often requires specialized tools and expertise, so it's recommended to seek professional help.

10. How can I prevent a U0140 code from occurring in my Nissan Sentra?

Regularly inspecting and maintaining the electrical system, ensuring proper battery health, and addressing any warning signs promptly can help prevent issues leading to a U0140 code.