AutoCodes – Lexus – B124C Lexus

B124C Lexus Code - Automatic High Beam Camera

Quick Answer

This Diagnostic Trouble Code (DTC) is stored when the Main Body ECU (Multiplex Network Body ECU) detects a malfunction in the Forward Recognition Camera. Common causes include Faulty Forward Recognition Camera, Forward Recognition Camera harness is open or shorted, Forward Recognition Camera circuit poor electrical connection. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means: B124C Lexus indicates Automatic High Beam Camera.
Common causes: Common causes include Faulty Forward Recognition Camera, Forward Recognition Camera harness is open or shorted, Forward Recognition Camera circuit poor electrical connection.
Severity: Low - monitor the vehicle and repair when practical.
Can I drive?: The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

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Code Popularity 616

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Nov 19, 2024

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code B124C Lexus Description

This Diagnostic Trouble Code (DTC) is stored when the Main Body ECU (Multiplex Network Body ECU) detects a malfunction in the Forward Recognition Camera.

OBDII Code B124C Lexus - Automatic High Beam Camera - AutoCodes.com — B124C Lexus Code - Automatic High Beam Camera

What does this mean?

What are the Possible Causes of the DTC B124C Lexus?

Faulty Forward Recognition Camera
Forward Recognition Camera harness is open or shorted
Forward Recognition Camera circuit poor electrical connection
Faulty Main Body ECU (Multiplex Network Body ECU)

How to Fix the DTC B124C Lexus?

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 does this mean?

Code Tech Notes

When replacing the forward recognition camera, always replace it with a new one. If a forward recognition camera that was installed on another vehicle is used, the information stored in the forward recognition camera will not match the information from the vehicle. As a result, a DTC may be stored.
If the forward recognition camera has been replaced with a new one, be sure to perform Recognition Camera/Target Position Memory and Recognition Camera Axis Adjust.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B124C Lexus 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.

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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 B124C Lexus Code

1. What does OBDII code B124C in a Lexus indicate?

The B124C code pertains to a fault in the Automatic High Beam Camera system.

2. What are the common symptoms of a B124C code in a Lexus?

Common symptoms may include issues with the automatic high beam function, warning lights on the dashboard, or a malfunctioning high beam camera.

3. What are the potential causes of a B124C code in a Lexus?

Potential causes include a faulty high beam camera, wiring issues, sensor misalignment, or software glitches.

4. How can I diagnose a B124C code in my Lexus?

Diagnosis typically involves using a diagnostic scanner to retrieve the specific fault codes, inspecting the high beam camera system for visible damage, and testing the camera's functionality.

5. Can I repair a B124C code issue in my Lexus at home?

Repairing a B124C code may require professional expertise due to the complexity of the high beam camera system. However, basic checks like ensuring proper wiring connections can be done at home.

6. Is it safe to drive my Lexus with a B124C code present?

It is generally safe to drive with a B124C code, but it is recommended to address the issue promptly to avoid potential complications with the high beam camera system.

7. How much does it cost to repair a B124C code in a Lexus?

The repair cost for a B124C code in a Lexus can vary depending on the specific issue, labor rates, and parts needed. It is advisable to consult a professional for an accurate cost estimate.

8. Can a B124C code be cleared/reset without fixing the underlying issue?

Clearing or resetting the B124C code without addressing the root cause may temporarily remove the warning lights, but the issue will likely reoccur until the problem is fixed.

9. How long does it typically take to repair a B124C code in a Lexus?

The repair time for a B124C code can vary based on the exact problem, availability of parts, and the expertise of the technician. It may range from a few hours to a full day.

10. Are there any recalls or technical service bulletins related to the B124C code in Lexus vehicles?

It is advisable to check with a Lexus dealership or visit the manufacturer's website to see if there are any recalls or technical service bulletins related to the B124C code in your specific Lexus model.