AutoCodes – Generic – B124C:04

B124C:04 Code - USB 2 Circuit Open

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:04 indicates USB 2 Circuit Open.
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.

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Code Popularity 923

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Nov 19, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B124C:04 Description

The infotainment system has a USB port and an Auxiliary Audio Input Jack located in the center console. The receptacle assembly receives fused battery voltage and ground from the harness to power the internal hub device as well as providing additional amperage to power USB devices.
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.
The Diagnostic Trouble Code (DTC) will be set when the human machine interface control module does not detect the vehicle hub device.

OBDII Code B124C:04 - USB 2 Circuit Open - AutoCodes.com — B124C:04 Code - USB 2 Circuit Open

What does this mean?

What are the Possible Causes of the DTC B124C:04?

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:04?

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:04 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.

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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 B124C:04 Code

1. What does OBDII code B124C:04 mean?

Code B124C:04 indicates an open circuit in the USB 2 system, meaning the vehicle is detecting a disconnection or fault in the wiring or components of the second USB port.

2. What are common symptoms of code B124C:04?

Symptoms may include the USB 2 port not functioning, inability to charge devices, failure to recognize connected devices, or error messages on the infotainment screen.

3. What causes code B124C:04?

Common causes include damaged or disconnected wiring, a faulty USB port, a malfunctioning USB hub, or corrosion in the USB connectors.

4. Can I still use other USB ports if code B124C:04 is present?

Yes, other USB ports may function normally if the fault is isolated to the USB 2 circuit.

5. How can I diagnose the cause of code B124C:04?

Start by inspecting the USB 2 port and its wiring for damage, disconnections, or corrosion. Use a multimeter to check for continuity in the circuit.

6. Is code B124C:04 a serious issue?

While it doesnâ€™t impact the vehicle's drivability, it can affect convenience features like device charging and media playback.

7. How do I fix code B124C:04?

Repair steps may include reconnecting or replacing damaged wiring, cleaning corroded connectors, or replacing the faulty USB port.

8. Can software updates fix code B124C:04?

In rare cases, a software update for the infotainment system may resolve the issue if itâ€™s related to a software glitch rather than a physical fault.

9. Can I clear code B124C:04 without repairs?

Clearing the code with a scan tool may temporarily reset the system, but the code will likely return unless the underlying issue is resolved.

10. Should I take my car to a professional for code B124C:04?

If you're unable to identify the problem or lack the tools for repair, itâ€™s best to consult a professional technician to ensure proper diagnosis and repair.