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U147B RAM Code - Implausible Data Received From Battery Monitor Module

Quick Answer

The U147B diagnostic trouble code (DTC) indicates that the vehicle's onboard computer has detected implausible data received from the Battery Monitor Module (BMM). Common causes include Loose or corroded wiring connections between the BMM and the vehicle's computer, Faulty Battery Monitor Module, Defective battery affecting data transmission. 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
U147B RAM indicates Implausible Data Received From Battery Monitor Module.
Common causes
Common causes include Loose or corroded wiring connections between the BMM and the vehicle's computer, Faulty Battery Monitor Module, Defective battery affecting data transmission.
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 11, 2024
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Code U147B RAM Description

The U147B diagnostic trouble code (DTC) indicates that the vehicle's onboard computer has detected implausible data received from the Battery Monitor Module (BMM). The Battery Monitor Module is responsible for monitoring the health and performance of the vehicle's battery, ensuring that it is functioning properly and providing the necessary power for the vehicle's electrical systems. When the vehicle's computer receives data that is inconsistent or inaccurate from the BMM, it triggers the U147B code.

OBDII Code U147B RAM - Implausible Data Received From Battery Monitor Module
U147B RAM Code - Implausible Data Received From Battery Monitor Module

Common Causes of U147B RAM

  1. Loose or corroded wiring connections between the BMM and the vehicle's computer
  2. Faulty Battery Monitor Module
  3. Defective battery affecting data transmission
  4. Software issues in the vehicle's computer system
  5. Electrical interference or signal disruption

Symptoms of U147B RAM

  1. Warning light illuminated on the dashboard
  2. Erratic battery voltage readings
  3. Difficulty starting the vehicle
  4. Inaccurate battery charge level display
  5. Electrical components malfunctioning or not working properly

How to Fix U147B RAM

  1. Begin by conducting a thorough inspection of the wiring connections between the BMM and the vehicle's computer. Ensure all connections are secure, clean, and free of corrosion. Repair or replace any damaged wiring as needed.
  2. Test the Battery Monitor Module to determine if it is functioning correctly. If the BMM is faulty, it will need to be replaced with a new unit.
  3. Check the battery for any issues that could be affecting data transmission. Test the battery's health and charge level, and replace it if necessary.
  4. Perform a software update or reprogramming of the vehicle's computer system to address any potential software issues causing the U147B code.
  5. Clear the DTC from the vehicle's computer memory and perform a test drive to ensure the issue has been resolved.

Cost to Fix U147B RAM

The typical repair costs for addressing the U147B DTC can vary depending on the specific cause of the issue. Generally, the cost of parts such as a new Battery Monitor Module can range from $200 to $500, while labor charges can add an additional $100 to $300. Overall, the total repair cost for this issue could range from $300 to $800. It's important to note that diagnosis time and labor rates at auto repair shops can vary, so it's advisable to check with local shops for more precise estimates based on your vehicle make and model.

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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 U147B RAM Code

1. What are common symptoms of the OBDII code U147B RAM?

- Common symptoms of this code include issues with the vehicle's electrical system, such as erratic battery voltage readings or warning lights related to the battery.

2. What does the OBDII code U147B RAM mean?

- The code U147B RAM indicates that the vehicle's onboard diagnostic system has detected implausible data received from the Battery Monitor Module.

3. What are the possible causes of the U147B RAM code?

- Possible causes of this code include a faulty Battery Monitor Module, wiring or connection issues, software glitches, or a malfunction in the vehicle's electrical system.

4. How can I diagnose the U147B RAM code?

- Diagnosing this code typically involves using a diagnostic scanner to read the code, checking the battery monitor module and related connections for any issues, and performing a voltage test on the battery.

5. Is it safe to continue driving with the U147B RAM code?

- It is not recommended to continue driving with this code present, as it could indicate underlying issues with the vehicle's electrical system that may lead to more serious problems if left unattended.

6. How can I repair the U147B RAM code?

- Repairing this code may involve replacing the Battery Monitor Module if it is found to be faulty, checking and repairing any wiring or connection issues, and clearing the code with a diagnostic scanner.

7. Can a DIY enthusiast fix the U147B RAM code?

- While some simple checks like inspecting connections can be done by a DIY enthusiast, diagnosing and repairing underlying issues related to this code may require professional help due to the complexity of the vehicle's electrical system.

8. Are there any common related codes to the U147B RAM code?

- Common related codes to the U147B RAM code may include other battery or electrical system-related codes, such as codes indicating low battery voltage or charging system issues.

9. How can I prevent the U147B RAM code from recurring?

- To prevent the U147B RAM code from recurring, it is essential to regularly maintain the vehicle's battery and electrical system, address any warning signs promptly, and follow the manufacturer's recommended maintenance schedule.

10. Will resetting the code make it go away permanently?

- Simply resetting the code may make the warning light disappear temporarily, but if the underlying issue causing the U147B RAM code is not addressed and repaired, the code is likely to reappear.

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