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B124F 2017 GMC Sierra Code - Universal Serial Bus Programming

Quick Answer

The B124F diagnostic trouble code (DTC) in a 2017 GMC Sierra relates to an issue with the Universal Serial Bus (USB) programming in the vehicle. Common causes include Damaged or corroded wiring in the USB system, Faulty USB port hardware, Software glitches in the vehicle's programming. 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
B124F 2017 GMC Sierra indicates Universal Serial Bus Programming.
Common causes
Common causes include Damaged or corroded wiring in the USB system, Faulty USB port hardware, Software glitches in the vehicle's programming.
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 16, 2024
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Code B124F 2017 GMC Sierra Description

The B124F diagnostic trouble code (DTC) in a 2017 GMC Sierra relates to an issue with the Universal Serial Bus (USB) programming in the vehicle. This code indicates a problem with the communication between the vehicle's onboard computer system and the USB ports. The USB ports in modern vehicles are used for various functions, including connecting external devices such as smartphones, music players, and USB drives. When this code is triggered, it can lead to malfunctions in the USB system, affecting the ability to use these devices in the vehicle.

OBDII Code B124F 2017 GMC Sierra - Universal Serial Bus Programming
B124F 2017 GMC Sierra Code - Universal Serial Bus Programming

Common Causes of B124F 2017 GMC Sierra

  1. Damaged or corroded wiring in the USB system.
  2. Faulty USB port hardware.
  3. Software glitches in the vehicle's programming.
  4. Malfunctioning control module responsible for USB communication.

Symptoms of B124F 2017 GMC Sierra

  1. USB ports not recognizing devices when plugged in.
  2. Inability to charge devices through the USB ports.
  3. Error messages on the vehicle's infotainment system related to USB connectivity.
  4. Intermittent connection issues with devices plugged into the USB ports.

How to Fix B124F 2017 GMC Sierra

  1. Begin by conducting a thorough inspection of the USB system, checking for any visible damage to wiring or ports.
  2. Use a diagnostic scan tool to retrieve the specific trouble code and further pinpoint the source of the issue.
  3. Replace any damaged wiring or faulty USB ports as needed.
  4. Update the vehicle's software programming to address any glitches that may be causing the problem.
  5. If the issue persists, consider replacing the control module responsible for USB communication.

Cost to Fix B124F 2017 GMC Sierra

The typical repair costs for addressing a B124F code in a 2017 GMC Sierra can vary depending on the specific cause of the issue. In general, replacing damaged wiring or faulty USB ports may cost between $100 to $300, including parts and labor. Software updates and control module replacements can be more expensive, potentially ranging from $200 to $500 or more. It's important to note that these are rough estimates, and actual costs may vary based on factors such as location, vehicle make and model, and the extent of the repairs needed. Additionally, diagnostic time and labor rates at auto repair shops can impact the overall cost, with rates typically ranging from $80 to $150 per hour. It's recommended to consult with a qualified mechanic to get a more accurate estimate for addressing this issue.

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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 B124F 2017 GMC Sierra Code

1. What does the OBDII code B124F mean on a 2017 GMC Sierra?

The B124F code indicates a fault related to the Universal Serial Bus (USB) programming module, often involving communication or functionality issues with the USB system.

2. What are the common symptoms of the B124F code in a 2017 GMC Sierra?

Symptoms may include the USB port not recognizing devices, inability to play media, or charging issues when connecting devices.

3. What causes the B124F code to appear?

Common causes include a malfunctioning USB port, damaged wiring or connections, software issues in the infotainment system, or a faulty USB module.

4. How can I diagnose the B124F code on my GMC Sierra?

Start by checking for visible damage to the USB port, inspecting wiring and connectors, and using a diagnostic scan tool to verify the fault and check for related codes.

5. Can a software update fix the B124F code?

Yes, in some cases, updating the vehicle’s infotainment system software can resolve the issue if the problem is caused by outdated or corrupted programming.

6. Is the USB module the most likely part to replace for the B124F code?

Not always. While the USB module could be faulty, the issue might also stem from wiring or software, so thorough diagnostics are necessary before replacing parts.

7. Can I still use my USB port with the B124F code active?

It depends on the severity of the fault. In most cases, the USB port may not function properly until the issue is resolved.

8. How much does it cost to repair a B124F code on a 2017 GMC Sierra?

Repair costs vary but can range from $50–$150 for diagnostics and minor repairs, while replacing a USB module or wiring may cost $200–$500 or more.

9. Can I clear the B124F code without fixing the issue?

Clearing the code without addressing the root cause may result in the code returning, as the fault will still exist.

10. Should I take my GMC Sierra to the dealership for the B124F code?

If you're unable to diagnose or repair the issue yourself, taking it to a dealership or a qualified mechanic is recommended for proper diagnostics and repair.

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