AutoCodes – Scion – B124A Scion

B124A Scion Code - Automatic High Beam Mirror

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: B124A Scion indicates Automatic High Beam Mirror.
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 343

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 B124A Scion 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 B124A Scion - Automatic High Beam Mirror - AutoCodes.com — B124A Scion Code - Automatic High Beam Mirror

What does this mean?

What are the Possible Causes of the DTC B124A Scion?

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 B124A Scion?

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 B124A Scion 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 B124A Scion Code

1. What does the OBDII code B124A for Scion Automatic High Beam Mirror indicate?

The B124A code specifically relates to a fault in the Automatic High Beam Mirror system of a Scion vehicle.

2. What are common symptoms of the OBDII code B124A in a Scion?

Common symptoms include malfunctioning automatic high beam mirror operation, dim or flickering high beams, or a warning light on the dashboard.

3. What are possible causes of the B124A code in a Scion?

Potential causes of the B124A code can include faulty automatic high beam mirror sensors, wiring issues, a malfunctioning control module, or a defective mirror assembly.

4. How can I diagnose the B124A code in my Scion Automatic High Beam Mirror system?

Diagnosis typically involves using an OBDII scanner to retrieve the specific code, inspecting the automatic high beam mirror components for visible damage, and testing the sensors and wiring for proper functionality.

5. Can I repair the B124A code issue in my Scion myself?

Depending on your skill level and access to tools, you may be able to address simpler issues like loose wiring connections. However, more complex problems may require professional diagnosis and repair.

6. Is it safe to drive my Scion with the B124A code present?

While driving with the B124A code may not immediately impact vehicle performance, it's important to address the underlying issue to ensure the proper functioning of your automatic high beam mirror system.

7. How much does it typically cost to repair the B124A code in a Scion Automatic High Beam Mirror system?

Repair costs can vary widely depending on the root cause of the issue. Simple fixes like replacing a sensor or fixing a wiring problem may be relatively inexpensive, while more complex repairs involving the control module or mirror assembly can be costlier.

8. Can resetting the OBDII system clear the B124A code in my Scion?

Resetting the OBDII system may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to reappear once the system runs its diagnostic checks again.

9. Are there any preventive maintenance tips to avoid the B124A code in my Scion?

Regularly inspecting the automatic high beam mirror system for any signs of damage or wear, keeping the components clean and free of debris, and addressing any issues promptly can help prevent the B124A code from occurring.

10. Is the B124A code specific to Scion vehicles only?

The B124A code is specific to Scion vehicles equipped with an Automatic High Beam Mirror system, but similar codes may exist for other makes and models with comparable features.