Engine-CodesGeneric – B124C:04

B124C:04 Code - USB 2 Circuit Open

Quick Answer

The B124C:04 diagnostic trouble code (DTC) refers to a USB 2 Circuit Open, indicating that there is an issue with the communication circuit related to the USB 2 port in the vehicle. Common causes include Damaged wiring or connectors in the USB 2 circuit, Loose connections at the USB port or control module, Faulty USB port or control module. 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
B124C:04 indicates USB 2 Circuit Open.
Common causes
Common causes include Damaged wiring or connectors in the USB 2 circuit, Loose connections at the USB port or control module, Faulty USB port or control module.
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.
Table of contents Created and updated by William Orellana on Sep 09, 2024
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Code B124C:04 Description

The B124C:04 diagnostic trouble code (DTC) refers to a USB 2 Circuit Open, indicating that there is an issue with the communication circuit related to the USB 2 port in the vehicle. In modern vehicles, USB ports are commonly used for connecting electronic devices such as smartphones, tablets, or USB drives. When this code is triggered, it means that the vehicle's onboard computer system has detected a break or open circuit in the USB 2 circuit, preventing proper communication or charging through that specific port.

OBDII Code B124C:04 - USB 2 Circuit Open
B124C:04 Code - USB 2 Circuit Open

Common Causes of B124C:04

  1. Damaged wiring or connectors in the USB 2 circuit
  2. Loose connections at the USB port or control module
  3. Faulty USB port or control module
  4. Water damage or corrosion in the USB circuit
  5. Electrical issues in the vehicle's wiring system

Symptoms of B124C:04

  1. USB port not charging devices
  2. Inability to connect devices to the USB port
  3. Error messages related to USB connectivity
  4. Audio system not recognizing connected devices
  5. Navigation system not updating via USB connection

How to Fix B124C:04

  1. Inspect the wiring and connectors in the USB 2 circuit for any damage or corrosion.
  2. Check for loose connections at the USB port and control module, ensuring a secure connection.
  3. Test the functionality of the USB port and control module to identify any faults.
  4. Replace any damaged wiring, connectors, or faulty components in the USB circuit.
  5. Clear the DTC from the vehicle's computer system and verify proper operation of the USB 2 port.

Cost to Fix B124C:04

The typical repair costs for addressing a B124C:04 code related to a USB 2 Circuit Open can vary depending on the specific cause of the issue. In general, the cost of parts such as wiring, connectors, or control modules may range from $50 to $200. Labor costs for diagnosing and repairing the problem can add an additional $100 to $300, depending on the shop's hourly rates and the complexity of the repair. Overall, the total repair cost for this issue could range from $150 to $500 or more. It is advisable to consult with a qualified mechanic or auto repair shop to obtain a more accurate estimate based on the vehicle's make and model, as well as the extent of the repair needed. Keep in mind that prices may vary based on location and other factors mentioned earlier.

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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 doesn’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 it’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, it’s best to consult a professional technician to ensure proper diagnosis and repair.

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