B124C 2014 GMC Sierra Code - USB 2 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
- B124C 2014 GMC Sierra indicates USB 2 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 B124C 2014 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 B124C 2014 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 B124C 2014 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 B124C 2014 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 B124C 2014 GMC Sierra code?
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Frequently Asked Questions about B124C 2014 GMC Sierra Code
1. What does OBDII code B124C mean on a 2014 GMC Sierra?
Code B124C indicates an issue with the USB 2 Circuit, which typically involves the connection or communication of the secondary USB port in the vehicle.
2. What are the symptoms of code B124C in a 2014 GMC Sierra?
Common symptoms include the USB port not charging devices, inability to play media through the port, or intermittent USB connectivity issues.
3. What causes the B124C code to appear in a 2014 GMC Sierra?
The most common causes include a damaged USB port, a broken or loose wiring connection, or a failed USB hub or module.
4. How can I diagnose the B124C code in my GMC Sierra?
Start by inspecting the USB port for physical damage. Then, check the wiring and connections for corrosion or disconnections. Use a scan tool to confirm module communication errors.
5. Can a blown fuse cause the B124C code in a 2014 GMC Sierra?
Yes, a blown fuse related to the USB circuit may trigger this code. Inspect the fuse box and replace any blown fuses associated with the USB system.
6. Is the B124C code related to all USB ports in the vehicle?
No, this code specifically refers to the USB 2 Circuit, which typically corresponds to the secondary USB port.
7. Can I fix the B124C code on my own?
If the issue is due to a loose connection, a blown fuse, or a damaged port, you may be able to fix it yourself. For more complex diagnoses, professional assistance is recommended.
8. How much does it cost to fix the B124C code on a GMC Sierra?
The cost varies depending on the issue. Replacing a USB port may cost $50-$150, while repairing wiring or replacing the USB module can cost $200-$400.
9. Can a software update resolve the B124C code in a 2014 GMC Sierra?
In rare cases, a software update to the infotainment system may fix the issue if it's related to a communication error. Consult your dealership for updates.
10. Will the B124C code affect the overall performance of my GMC Sierra?
No, this code only impacts the functionality of the secondary USB port and does not affect the vehicle’s overall performance.
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