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B124A 2015 Toyota RAV4 Code - Automatic High Beam Mirror

Quick Answer

The B124A diagnostic trouble code (DTC) in a 2015 Toyota RAV4 relates to the Automatic High Beam Mirror system. Common causes include Faulty sensors detecting light levels incorrectly, Damaged wiring or connectors in the Automatic High Beam Mirror system, Malfunctioning control module responsible for controlling the high beam adjustments. 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
B124A 2015 Toyota RAV4 indicates Automatic High Beam Mirror.
Common causes
Common causes include Faulty sensors detecting light levels incorrectly, Damaged wiring or connectors in the Automatic High Beam Mirror system, Malfunctioning control module responsible for controlling the high beam adjustments.
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 B124A 2015 Toyota RAV4 Description

The B124A diagnostic trouble code (DTC) in a 2015 Toyota RAV4 relates to the Automatic High Beam Mirror system. This code indicates a malfunction in the automatic high beam mirror system, which is responsible for automatically adjusting the high beams of the vehicle's headlights based on the surrounding light conditions. When this system fails, it can lead to issues with visibility during nighttime driving, potentially compromising the safety of the vehicle and its occupants.

OBDII Code B124A 2015 Toyota RAV4 - Automatic High Beam Mirror
B124A 2015 Toyota RAV4 Code - Automatic High Beam Mirror

Common Causes of B124A 2015 Toyota RAV4

  1. Faulty sensors detecting light levels incorrectly.
  2. Damaged wiring or connectors in the Automatic High Beam Mirror system.
  3. Malfunctioning control module responsible for controlling the high beam adjustments.
  4. Water or moisture damage affecting the sensors or wiring.
  5. Electrical issues within the system causing communication errors.

Symptoms of B124A 2015 Toyota RAV4

  1. High beams not automatically adjusting based on surrounding light conditions.
  2. High beams staying on constantly or not turning on at all.
  3. Dashboard warning light indicating a problem with the automatic high beam mirror system.
  4. Reduced visibility during nighttime driving.

How to Fix B124A 2015 Toyota RAV4

  1. Perform a diagnostic scan to retrieve the B124A code and pinpoint the exact cause of the issue.
  2. Inspect the sensors, wiring, and control module for any visible damage or faults.
  3. Repair or replace any damaged components, such as sensors or wiring harnesses.
  4. Clear the DTC from the vehicle's computer system and test the Automatic High Beam Mirror system to ensure proper functionality.
  5. If necessary, recalibrate the system to ensure accurate high beam adjustments based on light conditions.

Cost to Fix B124A 2015 Toyota RAV4

The cost of repairing the Automatic High Beam Mirror system related to the B124A code can vary depending on the specific cause of the issue and the labor rates in your area. On average, the repair costs for this type of issue can range from $200 to $500, including parts and labor. However, it's important to note that prices may fluctuate based on the severity of the problem and the need for any replacement parts. Additionally, diagnostic time and labor rates at auto repair shops can vary, so it's recommended to obtain a detailed estimate from a professional technician before proceeding with the repairs.

What does this mean?

Tech Notes for B124A 2015 Toyota RAV4

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.

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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 2015 Toyota RAV4 Code

1. What does the OBDII code B124A mean on a 2015 Toyota RAV4 Automatic High Beam Mirror system?

The B124A code indicates a fault in the Automatic High Beam Mirror system of the 2015 Toyota RAV4.

2. What are the common symptoms of OBDII code B124A in a 2015 Toyota RAV4?

Common symptoms of the B124A code may include malfunctioning automatic high beam mirror operation or a warning light on the dashboard.

3. What are the possible causes of OBDII code B124A in a 2015 Toyota RAV4?

Possible causes of the B124A code include wiring issues, a faulty automatic high beam mirror sensor, or a malfunction in the control module.

4. How can I diagnose the OBDII code B124A in my 2015 Toyota RAV4?

Diagnosing the B124A code typically involves using an OBDII scanner to retrieve the code, checking the wiring and connections, and testing the automatic high beam mirror components.

5. Can I still drive my 2015 Toyota RAV4 with the OBDII code B124A present?

It is generally safe to continue driving your vehicle with the B124A code, but it is recommended to have the issue diagnosed and repaired to ensure proper operation of the automatic high beam mirror system.

6. How can I reset the OBDII code B124A in my 2015 Toyota RAV4?

Resetting the B124A code can be done using an OBDII scanner by clearing the code after addressing the underlying issue with the automatic high beam mirror system.

7. Are there any DIY repair tips for fixing the OBDII code B124A in a 2015 Toyota RAV4?

DIY repair tips may include checking and cleaning the connections, inspecting the sensor for damage, and ensuring there are no obstructions affecting the automatic high beam mirror operation.

8. Is it recommended to seek professional help for repairing the OBDII code B124A in a 2015 Toyota RAV4?

For complex issues or if you are unsure about the diagnosis, it is advisable to seek the help of a qualified mechanic or dealership to properly address the B124A code in your 2015 Toyota RAV4.

9. How much does it cost to repair the OBDII code B124A in a 2015 Toyota RAV4?

The cost of repairing the B124A code can vary depending on the underlying issue, parts needed, and labor costs, so it is recommended to obtain quotes from different repair shops.

10. Can the OBDII code B124A in a 2015 Toyota RAV4 cause other problems if left unaddressed?

Leaving the B124A code unaddressed may lead to continued issues with the automatic high beam mirror system and could potentially affect the overall performance of the vehicle's lighting system.

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