B124B GMC Code - USB 1 Circuit
Quick Answer
The infotainment system has a USB port and an Auxiliary Audio Input Jack located in the center console. Common causes include Faulty USB Port, USB Port harness is open or shorted, USB Port 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
- B124B GMC indicates USB 1 Circuit.
- Common causes
- Common causes include Faulty USB Port, USB Port harness is open or shorted, USB Port 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.
Code B124B GMC Description
The internal hub device interfaces directly with the human-machine interface control module via a standard USB cable. A Mini type of USB connector is used to connect the human-machine interface control module and the USB receptacle. Standard USB male-to-female connections are typically used for connecting USB cables together where an in-line connection is required. An in-line cable connection is typically found between the console and the I/P harness.
The USB port allows connectivity to the infotainment system from portable media players or a USB storage device (memory stick/ flash drive). When a device is connected to the USB port, the system detects the device and switches to USB as the audio source. Once connected, the device can be controlled by the radio controls.
Not all portable media player devices or file types are compatible. Refer to the owner’s manual for information on USB devices, control, and operation.
What are the Possible Causes of the DTC B124B GMC?
- Faulty USB Port
- USB Port harness is open or shorted
- USB Port circuit poor electrical connection
- Faulty Human Machine Interface Control Module (If equipped)
- Faulty Radio
How to Fix the DTC B124B GMC?
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 is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B124B GMC 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.
Need more information about the B124B GMC code?
Need more information on how to fix the B124B GMC code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the B124B GMC code diagnosed by a professional: Find a repair shop in your area
Information for Specific GMC Models
- B124B 2014 GMC Sierra — USB 1 Circuit
- B124B 2015 GMC Sierra — USB 1 Circuit
- B124B 2016 GMC Sierra — USB 1 Circuit
- B124B 2017 GMC Sierra — USB 1 Circuit
- B124B 2018 GMC Sierra — USB 1 Circuit
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.
Discuss the causes and fixes for B124B GMC OBDII Code
Code B124B GMC comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
