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U0140 Chrysler Code - Lost Communication With Body Control Module

Quick Answer

The U0140 code for Chrysler vehicles indicates that there is a communication error between the Engine Control Module (ECM) and the Body Control Module (BCM). Common causes include Faulty wiring or loose connections, Defective Body Control Module (BCM) or Engine Control Module (ECM), Software glitches or communication errors. 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 Chrysler indicates Lost Communication With Body Control Module.
Common causes
Common causes include Faulty wiring or loose connections, Defective Body Control Module (BCM) or Engine Control Module (ECM), Software glitches or communication errors.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 12, 2024
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Code U0140 Chrysler Description

The U0140 code for Chrysler vehicles indicates that there is a communication error between the Engine Control Module (ECM) and the Body Control Module (BCM). The BCM is responsible for controlling various functions related to the vehicle's body, such as lighting, door locks, windows, and security systems. When communication is lost between these two modules, it can lead to issues with the proper functioning of these systems.

OBDII Code U0140 Chrysler - Lost Communication With Body Control Module
U0140 Chrysler Code - Lost Communication With Body Control Module

Common Causes of U0140 Chrysler

  1. Faulty wiring or loose connections
  2. Defective Body Control Module (BCM) or Engine Control Module (ECM)
  3. Software glitches or communication errors
  4. Electrical interference or corrosion in connectors
  5. Vehicle collisions or physical damage to wiring or modules

Symptoms of U0140 Chrysler

  1. Check engine light illuminated on the dashboard
  2. Malfunctioning exterior lights
  3. Inoperative power windows or locks
  4. Issues with the security system
  5. Intermittent stalling or failure to start

How to Fix U0140 Chrysler

  1. Perform a thorough diagnostic scan to retrieve the U0140 code and pinpoint the source of the communication error.
  2. Inspect the wiring harness and connectors for any signs of damage, corrosion, or loose connections. Repair or replace as needed.
  3. Test the Body Control Module (BCM) and Engine Control Module (ECM) for proper functioning. Replace any faulty modules.
  4. Clear the code from the vehicle's computer system and perform a test drive to ensure that the communication error has been resolved.
  5. If the issue persists, consult a professional technician for further diagnosis and repair.

Cost to Fix U0140 Chrysler

The typical repair costs for addressing a U0140 code can vary depending on the specific cause of the communication error and the extent of the repairs needed. In general, the cost of replacing a faulty module or repairing wiring issues can range from $200 to $600 or more. Additionally, labor costs can add another $100 to $300 or more, depending on the shop's hourly rates and the complexity of the repair. It is advisable to obtain a detailed estimate from a reputable auto repair shop to get a more precise cost estimate based on the specific circumstances of the vehicle. Labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type, so it is essential to consider these factors when budgeting for the repair.

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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 Chrysler Code

1. What are the common symptoms of OBDII code U0140 in a Chrysler vehicle?

- Common symptoms include issues with power windows, door locks, lighting controls, or other body module functions not working properly.

2. What does the OBDII code U0140 in a Chrysler indicate?

- The U0140 code indicates that there is a communication problem between the vehicle's engine control module (ECM) and the body control module (BCM).

3. What are some possible causes of the U0140 code in a Chrysler?

- Possible causes include a faulty body control module, damaged wiring or connectors between the ECM and BCM, or a software issue.

4. How can I diagnose the U0140 code in my Chrysler?

- Diagnosing the U0140 code typically involves using a professional OBDII scanner to retrieve the specific details of the code and checking the communication lines between the ECM and BCM.

5. Can the U0140 code be cleared/reset in a Chrysler vehicle?

- Yes, the U0140 code can be cleared/reset using an OBDII scanner, but it is important to address the underlying communication issue to prevent the code from reappearing.

6. What are some repair tips for fixing the U0140 code in a Chrysler?

- Repair tips may include checking and repairing any damaged wiring or connectors, replacing the body control module if necessary, and updating software as recommended by the manufacturer.

7. Is it safe to continue driving with the U0140 code present in a Chrysler?

- It is generally not recommended to continue driving with the U0140 code present, as it can lead to further electrical issues and potential safety concerns with the vehicle.

8. Can a DIY enthusiast fix the U0140 code in a Chrysler, or is professional help required?

- While some DIY enthusiasts may be able to diagnose and repair the U0140 code, it is often recommended to seek professional help, especially when dealing with complex electrical systems.

9. How much does it typically cost to repair the U0140 code in a Chrysler vehicle?

- The cost of repairing the U0140 code can vary depending on the specific cause of the issue, but it may involve expenses for parts, labor, and diagnostic services.

10. Are there any recalls or technical service bulletins related to the U0140 code in Chrysler vehicles?

- It is advisable to check with the Chrysler dealership or manufacturer for any recalls or technical service bulletins related to the U0140 code to see if there are any known issues or solutions available.

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