B124B 2017 GMC Sierra 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 2017 GMC Sierra 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 2017 GMC Sierra 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 2017 GMC Sierra?
- 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 2017 GMC Sierra?
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 2017 GMC Sierra 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 2017 GMC Sierra code?
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Frequently Asked Questions about B124B 2017 GMC Sierra Code
1. What does the OBDII code B124B mean on a 2017 GMC Sierra?
The B124B code indicates a problem with the USB 1 Circuit, which involves a fault in the USB system's electrical components or connections.
2. What are common symptoms of code B124B in a 2017 GMC Sierra?
Symptoms may include the USB port not recognizing devices, intermittent USB functionality, or no power to the USB port.
3. What causes the B124B code to appear on a GMC Sierra?
Common causes include a damaged USB port, faulty wiring or connectors, or a malfunctioning infotainment system.
4. Can a blown fuse cause the B124B code in a 2017 GMC Sierra?
Yes, a blown fuse related to the USB circuit can trigger this code, as it disrupts the power supply to the USB system.
5. How do you diagnose the B124B code on a 2017 GMC Sierra?
Diagnosis involves inspecting the USB port, checking for loose or damaged wiring, verifying fuse integrity, and possibly using a scan tool to check related modules.
6. Can a software issue cause the B124B code in a GMC Sierra?
Yes, a glitch or outdated software in the infotainment system may lead to USB circuit errors and trigger the code.
7. How can the B124B code be fixed on a 2017 GMC Sierra?
Repairs may include replacing a faulty USB port, repairing damaged wiring, resetting or updating the infotainment system, or replacing a blown fuse.
8. Is it safe to drive with the B124B code on a GMC Sierra?
Yes, it’s generally safe to drive, but the USB functionality may be impaired until the issue is resolved.
9. How much does it typically cost to fix the B124B code on a 2017 GMC Sierra?
Repair costs can vary, but fixing the issue may range from $50 for a simple fuse replacement to $300 or more if the infotainment system or wiring needs repair.
10. Can I clear the B124B code without fixing the issue?
Clearing the code with a scan tool is possible, but the code will likely return if the underlying issue isn’t resolved.
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