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U149D RAM Code - LBSS Receives An Implausible Message From The BCM

Quick Answer

The U149D diagnostic trouble code (DTC) indicates that the LBSS (Left Blind Spot Sensor) module has received an implausible message from the BCM (Body Control Module). Common causes include Faulty LBSS sensor, Wiring issues or poor connections between the LBSS and BCM, Software glitches in either the LBSS or BCM. 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
U149D RAM indicates LBSS Receives An Implausible Message From The BCM.
Common causes
Common causes include Faulty LBSS sensor, Wiring issues or poor connections between the LBSS and BCM, Software glitches in either the LBSS or BCM.
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 17, 2024
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Code U149D RAM Description

The U149D diagnostic trouble code (DTC) indicates that the LBSS (Left Blind Spot Sensor) module has received an implausible message from the BCM (Body Control Module). In modern vehicles, various control modules communicate with each other to ensure the proper functioning of different systems. The LBSS is responsible for detecting objects in the vehicle's blind spot and providing alerts to the driver to prevent accidents during lane changes. The BCM, on the other hand, is a crucial component that controls various functions such as lighting, door locks, and other electrical systems.

OBDII Code U149D RAM - LBSS Receives An Implausible Message From The BCM
U149D RAM Code - LBSS Receives An Implausible Message From The BCM

Common Causes of U149D RAM

  1. Faulty LBSS sensor.
  2. Wiring issues or poor connections between the LBSS and BCM.
  3. Software glitches in either the LBSS or BCM.
  4. Malfunctioning BCM.
  5. Water or corrosion damage affecting the LBSS or BCM.

Symptoms of U149D RAM

  1. Malfunctioning or inconsistent blind spot monitoring alerts.
  2. Warning lights related to blind spot monitoring system on the dashboard.
  3. Inability to activate or deactivate the blind spot monitoring system.
  4. Erratic behavior of other related systems controlled by the BCM.

How to Fix U149D RAM

  1. Begin by conducting a thorough visual inspection of the LBSS sensor, wiring, and connections to the BCM.
  2. Use a diagnostic scan tool to retrieve and clear the U149D code and monitor the system for any recurring issues.
  3. Test the LBSS sensor functionality and replace it if necessary.
  4. Check for any software updates for the LBSS and BCM and perform the updates if available.
  5. If the issue persists, consider replacing the BCM after ruling out other possible causes.

Cost to Fix U149D RAM

The cost of repairing a U149D code can vary depending on the specific cause of the issue. In general, replacing a faulty LBSS sensor can cost between $100 to $300, while addressing wiring or connection problems may range from $50 to $200. Software updates are usually less expensive, with costs typically around $50 to $100. If the BCM needs to be replaced, the cost can be higher, ranging from $300 to $800 or more. Labor costs at auto repair shops can add to the total expense, with hourly rates typically falling between $80 and $150. It's advisable to consult with a professional mechanic to get an accurate estimate based on the specific circumstances of your vehicle.

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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 U149D RAM Code

1. What are common symptoms of OBDII code U149D RAM titled LBSS Receives An Implausible Message From The BCM?

- Common symptoms include erratic speedometer readings, cruise control malfunctions, and illuminated warning lights on the dashboard.

2. What can cause the OBDII code U149D RAM to trigger LBSS Receives An Implausible Message From The BCM?

- The most common causes are faulty wiring connections, a malfunctioning BCM (Body Control Module), or a communication error between the LBSS and BCM.

3. How can I diagnose the issue related to code U149D RAM LBSS Receives An Implausible Message From The BCM?

- Use a diagnostic scanner to retrieve the fault code, inspect the wiring harness for any damage, and check for loose connections between the LBSS and BCM.

4. Is it safe to drive my vehicle with the U149D RAM code related to LBSS and BCM communication issue?

- It is not recommended to drive the vehicle with this code present, as it can lead to inaccurate speed readings and potential safety hazards.

5. How can I repair OBDII code U149D RAM LBSS Receives An Implausible Message From The BCM?

- Repair options include fixing wiring issues, replacing the LBSS or BCM if necessary, and clearing the fault code with a diagnostic tool.

6. Can a DIY enthusiast fix the U149D RAM code issue at home?

- Depending on the level of expertise, a DIY enthusiast may be able to address simple wiring problems but more complex issues may require professional assistance.

7. Will resetting the fault code temporarily resolve the U149D RAM LBSS communication problem?

- Resetting the fault code may temporarily clear the warning light, but if the underlying issue is not fixed, the code is likely to reappear.

8. Are there any recalls or technical service bulletins related to OBDII code U149D RAM LBSS Receives An Implausible Message From The BCM?

- It's advisable to check with the vehicle manufacturer or authorized service centers for any recalls or technical bulletins related to this specific fault code.

9. How much does it typically cost to repair the U149D RAM code issue with LBSS and BCM communication?

- The cost of repair can vary depending on the exact cause of the issue, but it may range from a simple wiring repair cost to a more expensive BCM replacement.

10. Can a faulty LBSS affect other systems in the vehicle besides the speedometer and cruise control?

- Yes, a malfunctioning LBSS can affect other systems that rely on speed data, such as the transmission control module or the ABS (Anti-lock Braking System).

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