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Engine-Codes – Generic – B124B:0B

B124B:0B Code - USB 1 Circuit High Current

Quick Answer

The B124B:0B diagnostic trouble code (DTC) indicates a problem with the USB 1 circuit in the vehicle, specifically relating to high current. Common causes include Short circuit in the USB 1 circuit, Faulty USB port, Overloaded USB port due to using high-power devices. 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:0B indicates USB 1 Circuit High Current.
Common causes
Common causes include Short circuit in the USB 1 circuit, Faulty USB port, Overloaded USB port due to using high-power devices.
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 13, 2024
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Code B124B:0B Description

The B124B:0B diagnostic trouble code (DTC) indicates a problem with the USB 1 circuit in the vehicle, specifically relating to high current. This code typically points to an issue with the electrical system that controls the USB 1 port, which is commonly used for charging devices or connecting external media. When this code is triggered, it means that the current flowing through the USB 1 circuit is higher than the specified limit, which can lead to various issues with the vehicle's electronics.

OBDII Code B124B:0B - USB 1 Circuit High Current
B124B:0B Code - USB 1 Circuit High Current

Common Causes of B124B:0B

  1. Short circuit in the USB 1 circuit.
  2. Faulty USB port.
  3. Overloaded USB port due to using high-power devices.
  4. Wiring issues in the USB 1 circuit.
  5. Faulty control module for the USB 1 circuit.

Symptoms of B124B:0B

  1. USB port not charging devices.
  2. Devices not recognized when connected to the USB port.
  3. Electrical system malfunctions.
  4. Warning lights related to the electrical system on the dashboard.
  5. Fuse blowing related to the USB 1 circuit.

How to Fix B124B:0B

  1. Begin by checking the wiring and connections in the USB 1 circuit for any visible damage or loose connections.
  2. Test the USB port with a multimeter to determine if it is functioning correctly or if it needs to be replaced.
  3. Inspect the control module for the USB 1 circuit to ensure it is sending the correct signals and not causing the high current condition.
  4. If necessary, replace any damaged wiring, connectors, the USB port, or the control module to resolve the issue.
  5. Clear the DTC from the vehicle's system using a diagnostic tool to ensure the problem has been successfully addressed.

Cost to Fix B124B:0B

The typical repair costs for addressing a high current condition in the USB 1 circuit can range from $100 to $300, depending on the specific parts that need to be replaced and the labor involved. It's important to note that diagnostic time and labor rates at auto repair shops can vary, so it's advisable to check with local shops for a more accurate estimate based on your vehicle make and model. Additionally, rates may be higher at dealerships or in metropolitan areas, while independent shops may offer more competitive pricing.

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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 B124B:0B Code

1. What does the OBDII code B124B:0B mean?

The code B124B:0B indicates a high current condition in the USB 1 circuit, suggesting an electrical issue such as an overload or short in the USB port or its wiring.

2. What are the common symptoms of code B124B:0B?

Symptoms may include a non-functional USB port, intermittent connectivity, overheating of the USB port, or a blown fuse.

3. What causes the B124B:0B code to appear?

This code can be caused by a damaged USB device, a short circuit in the USB wiring, a faulty USB port, or excessive current draw from a connected device.

4. Can I still use my USB port if code B124B:0B is active?

It is not recommended to use the affected USB port until the issue is resolved, as it could cause further damage to the vehicle's electrical system.

5. How is the B124B:0B code diagnosed?

Diagnosis involves inspecting the USB port, testing the USB wiring for continuity or shorts, and checking for any damaged or incompatible devices connected to the port.

6. Can a faulty USB device trigger the B124B:0B code?

Yes, a defective or incompatible USB device drawing excessive current can cause this code to appear.

7. How do I fix the B124B:0B code?

Repair involves removing any problematic USB devices, replacing damaged USB ports or wiring, and resetting the code using an OBDII scanner.

8. Is it safe to drive with the B124B:0B code?

While it may not affect drivability, ignoring the code could lead to further electrical issues in the vehicle.

9. Can a blown fuse cause the B124B:0B code?

Yes, if the USB circuit fuse is blown due to excessive current, it can trigger this code.

10. Will resetting the code fix the B124B:0B issue?

Resetting the code may temporarily clear it, but the underlying issue must be addressed to prevent the code from returning.

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