AutoCodes – Jeep – U0140 Jeep

U0140 Jeep Code - Lost Communication With Body Control Module

Quick Answer

When the ignition is activated and the battery voltage remains within the range of 10 to 16 volts, with the Body Control Module (BCM) properly configured, continuous monitoring of the BCM occurs. Common causes include Body Control Module (BCM) not configured correctly, Faulty Body Control Module, Body Control Module 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 Jeep indicates Lost Communication With Body Control Module.
Common causes: Common causes include Body Control Module (BCM) not configured correctly, Faulty Body Control Module, Body Control Module 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 5,404

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 Aug 26, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U0140 Jeep Description

When the ignition is activated and the battery voltage remains within the range of 10 to 16 volts, with the Body Control Module (BCM) properly configured, continuous monitoring of the BCM occurs. The Diagnostic Trouble Code (DTC) U0140 is triggered if the BCM fails to send or receive bus messages for a duration of approximately two to five seconds.

OBDII Code U0140 Jeep - Lost Communication With Body Control Module - AutoCodes.com — U0140 Jeep Code - Lost Communication With Body Control Module

What does this mean?

What are the Possible Causes of the DTC U0140 Jeep?

Body Control Module (BCM) not configured correctly
Faulty Body Control Module
Body Control Module harness is open or shorted
Body Control Module circuit poor electrical connection

How to Fix the DTC U0140 Jeep?

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 Jeep 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 Jeep code?

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

Need Help with the Code?

Get the U0140 Jeep 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 Jeep Code

1. What are common symptoms of the U0140 OBDII code in a Jeep related to lost communication with the Body Control Module (BCM)?

- Common symptoms include issues with interior and exterior lights, power windows, door locks, and other body control functions.

2. What are some possible causes of the U0140 code in a Jeep indicating a communication problem with the BCM?

- Potential causes include damaged wiring or connectors, a faulty BCM, a software glitch, or a problem with the communication network.

3. How can I diagnose the U0140 code in my Jeep if I suspect a communication failure with the BCM?

- To diagnose the issue, you can use a diagnostic scanner to check for other related codes, inspect the wiring and connectors for damage, and perform a BCM communication test.

4. Is it safe to continue driving my Jeep with the U0140 code related to lost communication with the BCM?

- It is not recommended to continue driving the vehicle with this code as it can lead to further electrical malfunctions and safety issues.

5. Can I repair the U0140 code in my Jeep related to the BCM communication problem on my own?

- While some basic troubleshooting steps can be done at home, it is recommended to seek professional help for diagnosing and repairing issues related to the BCM and communication network.

6. How much does it typically cost to repair the U0140 code in a Jeep due to lost communication with the BCM?

- The cost of repair can vary depending on the underlying cause, but it may range from a few hundred dollars for simple fixes to over a thousand dollars for more complex issues.

7. Will resetting the OBDII code U0140 in my Jeep make the problem go away permanently?

- Resetting the code may temporarily clear the warning light, but it will not fix the underlying issue causing the communication problem with the BCM.

8. Are there any preventive measures I can take to avoid encountering the U0140 code in my Jeep in the future?

- Regular maintenance checks, keeping the electrical system in good condition, and addressing any warning signs promptly can help prevent issues leading to the U0140 code.

9. Can weather conditions or extreme temperatures contribute to the U0140 code in a Jeep related to lost communication with the BCM?

- Yes, extreme weather conditions or temperature fluctuations can sometimes impact the communication network and lead to the U0140 code.

10. How long does it typically take to repair the U0140 code in a Jeep caused by lost communication with the BCM?

- The repair time can vary depending on the specific issue, but it may take a few hours to a full day for diagnosis and repair by a qualified technician.