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Engine-Codes – GMC – B124B GMC

B124B GMC Code - USB 1 Circuit

Quick Answer

The B124B GMC diagnostic trouble code refers to an issue with the USB 1 Circuit in the vehicle. Common causes include Damaged wiring leading to the USB port, Faulty USB port hardware, Defective control module controlling the USB circuit. 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 GMC indicates USB 1 Circuit.
Common causes
Common causes include Damaged wiring leading to the USB port, Faulty USB port hardware, Defective control module controlling the USB circuit.
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 10, 2024
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Code B124B GMC Description

The B124B GMC diagnostic trouble code refers to an issue with the USB 1 Circuit in the vehicle. This code indicates a problem with the USB port or the circuit that controls it. The USB port in modern vehicles is used for various purposes, such as charging devices, connecting to the infotainment system, or even for diagnostic purposes. When this circuit malfunctions, it can lead to a range of issues affecting the vehicle's performance and functionality.

OBDII Code B124B GMC - USB 1 Circuit
B124B GMC Code - USB 1 Circuit

Common Causes of B124B GMC

  1. Damaged wiring leading to the USB port
  2. Faulty USB port hardware
  3. Defective control module controlling the USB circuit
  4. Software issues related to the vehicle's USB functionality

Symptoms of B124B GMC

  1. Inability to charge devices through the USB port
  2. Failure to connect devices to the infotainment system
  3. Error messages related to the USB port on the dashboard
  4. Diagnostic tools unable to communicate with the vehicle through the USB port

How to Fix B124B GMC

  1. Start by inspecting the wiring leading to the USB port for any visible damage or loose connections.
  2. Test the USB port using a known working device to determine if the issue is with the hardware.
  3. Check the control module for any signs of damage or malfunction and replace if necessary.
  4. Update the vehicle's software to address any potential software-related issues affecting the USB circuit.
  5. Clear the diagnostic trouble code using a scan tool after completing the repairs to ensure the issue has been resolved.

Cost to Fix B124B GMC

The cost of repairing the USB 1 Circuit issue can vary depending on the specific cause of the problem and the extent of the repairs needed. On average, the cost of parts for this repair can range from $50 to $200, while labor costs can range from $100 to $300. This estimate does not include diagnostic fees, which can add to the total cost of the repair. It's recommended to consult with a professional technician to get a more accurate estimate based on the vehicle's make and model, as well as the specific issues identified during the diagnosis.

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Information for Specific GMC Models

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 GMC Code

1. What are the common symptoms of OBDII code B124B GMC related to the USB 1 Circuit?

The common symptoms include issues with the USB port functionality in the vehicle, such as the port not charging devices or not recognizing connected devices.

2. What are the potential causes of OBDII code B124B GMC related to the USB 1 Circuit?

Possible causes include a faulty USB port, damaged wiring or connectors in the USB circuit, or a malfunctioning USB module.

3. How can I diagnose the OBDII code B124B GMC related to the USB 1 Circuit?

Diagnosis involves checking the USB port for physical damage, inspecting the wiring and connectors for any issues, and using a diagnostic scanner to communicate with the USB module for error codes.

4. Can I repair OBDII code B124B GMC related to the USB 1 Circuit myself?

Depending on your level of automotive expertise, you may be able to repair the issue yourself by replacing the faulty USB port, repairing damaged wiring, or addressing any connector issues. However, professional help may be necessary for complex repairs.

5. Are there any quick tips for troubleshooting OBDII code B124B GMC related to the USB 1 Circuit?

You can start by checking if the USB port works with different devices to rule out device compatibility issues. Additionally, inspecting the fuse related to the USB circuit can help identify any electrical issues.

6. Is it safe to continue driving with OBDII code B124B GMC related to the USB 1 Circuit?

While the code itself may not affect the drivability of the vehicle, it is recommended to address the issue promptly to avoid potential electrical problems or inconveniences with the USB port functionality.

7. How much does it typically cost to repair OBDII code B124B GMC related to the USB 1 Circuit?

The cost of repairs can vary depending on the exact cause of the issue, parts needed for replacement, and labor charges. It is advisable to obtain quotes from different automotive service providers.

8. Can a faulty USB 1 Circuit affect other systems in the vehicle?

While the primary impact of a faulty USB 1 Circuit is related to the USB port functionality, it is possible for electrical issues in this circuit to potentially affect other connected systems or modules in the vehicle.

9. Are there any recalls or technical service bulletins related to OBDII code B124B GMC and the USB 1 Circuit?

It is recommended to check with the manufacturer or authorized dealerships for any recalls or technical service bulletins specific to this OBDII code and the USB 1 Circuit in GMC vehicles.

10. How can I prevent OBDII code B124B GMC related to the USB 1 Circuit in the future?

Regularly inspecting the USB port for any signs of damage, avoiding overloading the port with excessive power draw, and ensuring proper care when connecting devices can help prevent issues with the USB 1 Circuit.

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