Engine-Codes.com
Engine-Codes – Lexus – B124B Lexus

B124B Lexus Code - Automatic High Beam System

Quick Answer

The B124B diagnostic trouble code (DTC) for Lexus specifically refers to an issue with the Automatic High Beam System. Common causes include Faulty sensor or camera, Wiring issues or electrical connection problems, Malfunctioning control module. 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
B124B Lexus indicates Automatic High Beam System.
Common causes
Common causes include Faulty sensor or camera, Wiring issues or electrical connection problems, Malfunctioning control module.
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 07, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code B124B Lexus Description

The B124B diagnostic trouble code (DTC) for Lexus specifically refers to an issue with the Automatic High Beam System. This system is designed to automatically switch between high and low beams based on the surrounding light conditions and the presence of other vehicles on the road. When this code is triggered, it indicates that there is a malfunction or fault within the automatic high beam system that needs to be addressed.

OBDII Code B124B Lexus - Automatic High Beam System
B124B Lexus Code - Automatic High Beam System

Common Causes of B124B Lexus

  1. Faulty sensor or camera
  2. Wiring issues or electrical connection problems
  3. Malfunctioning control module
  4. Software glitch or programming error
  5. Physical damage to the high beam system components

Symptoms of B124B Lexus

  1. Inconsistent high beam activation
  2. High beams not turning off when approaching other vehicles
  3. High beams not turning on when driving in dark conditions
  4. Dashboard warning light indicating an issue with the high beam system
  5. Automatic high beam system not responding to changes in lighting conditions

How to Fix B124B Lexus

  1. Diagnose the issue by using a diagnostic scan tool to retrieve the specific trouble code and identify the source of the problem.
  2. Inspect the sensors, cameras, and wiring harness for any visible damage or corrosion that may be causing the malfunction.
  3. Test the control module and related components to ensure they are functioning correctly.
  4. Repair or replace any faulty components, such as sensors, wiring, or the control module, as needed.
  5. Clear the trouble code from the vehicle's computer system and test the automatic high beam system to ensure proper operation.

Cost to Fix B124B Lexus

The cost of repairing a B124B code related to the Automatic High Beam System in a Lexus can vary depending on the specific cause of the issue and the labor rates in your area. In general, the repair costs for this type of issue can range from $200 to $500, including parts and labor. Keep in mind that additional diagnostic time may be needed to pinpoint the exact cause of the problem, which can affect the overall repair cost. It's recommended to consult with a qualified mechanic or dealership to get an accurate estimate for your vehicle.

Need more information about the B124B Lexus code?

Need more information on how to fix the B124B Lexus code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B124B Lexus 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 B124B Lexus Code

1. What does OBDII code B124B for Lexus Automatic High Beam System mean?

- OBDII code B124B indicates a malfunction in the Automatic High Beam System of a Lexus vehicle.

2. What are the common symptoms of OBDII code B124B in a Lexus?

- Common symptoms of OBDII code B124B may include the automatic high beams not functioning properly, failure to switch between high and low beams, or a dashboard warning light related to the system.

3. What are the possible causes of OBDII code B124B in a Lexus?

- The possible causes of OBDII code B124B in a Lexus include faulty sensors, wiring issues, a defective control module, or a problem with the automatic high beam system components.

4. How can I diagnose OBDII code B124B in my Lexus Automatic High Beam System?

- Diagnosing OBDII code B124B typically involves using an OBDII scanner to retrieve the code, inspecting the automatic high beam system components for visible damage, and testing sensors and wiring for proper functionality.

5. Can I still drive my Lexus with OBDII code B124B present?

- It is generally safe to drive your Lexus with OBDII code B124B present, but it is recommended to have the issue diagnosed and repaired as soon as possible to ensure the proper functioning of the Automatic High Beam System.

6. How can I reset OBDII code B124B in my Lexus?

- Resetting OBDII code B124B in your Lexus can be done using an OBDII scanner to clear the code after the underlying issue with the Automatic High Beam System has been addressed.

7. Are there any DIY repair tips for fixing OBDII code B124B in a Lexus?

- DIY repair tips for addressing OBDII code B124B in a Lexus may include checking and cleaning sensor connections, inspecting wiring for damage, and ensuring all components of the Automatic High Beam System are properly connected and functioning.

8. Is it recommended to seek professional help for repairing OBDII code B124B in my Lexus?

- Due to the complexity of the Automatic High Beam System and potential safety implications, it is recommended to seek professional help from a certified mechanic or Lexus dealership to diagnose and repair OBDII code B124B.

9. Can OBDII code B124B in a Lexus be caused by a simple issue like a blown fuse?

- Yes, OBDII code B124B in a Lexus can sometimes be triggered by a blown fuse affecting the Automatic High Beam System. Checking and replacing any blown fuses is a good first step in troubleshooting the issue.

10. How much does it typically cost to repair OBDII code B124B in a Lexus?

- The cost to repair OBDII code B124B in a Lexus can vary depending on the underlying cause of the issue, the extent of the damage, and labor costs. It is advisable to obtain a diagnostic and repair estimate from a professional technician.

Discuss the causes and fixes for B124B Lexus OBDII Code

Submit a New Comment

Code B124B Lexus comments

No comments found for this page.