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Engine-Codes – Generic – B390C

B390C Code - Long Range Radar Sensor Module

Quick Answer

The B390C code refers to a fault detected in the Long Range Radar Sensor Module, which is a crucial component of the vehicle's advanced driver assistance system (ADAS). Common causes include Electrical connection issues or wiring damage, Sensor module failure due to environmental factors (moisture, heat, etc.), Software glitches or calibration errors. 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
B390C indicates Long Range Radar Sensor Module.
Common causes
Common causes include Electrical connection issues or wiring damage, Sensor module failure due to environmental factors (moisture, heat, etc.), Software glitches or calibration errors.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 08, 2024
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Code B390C Description

The B390C code refers to a fault detected in the Long Range Radar Sensor Module, which is a crucial component of the vehicle's advanced driver assistance system (ADAS). This sensor module is responsible for detecting objects around the vehicle, providing essential data for features such as adaptive cruise control, collision avoidance, and automatic emergency braking. When this code is triggered, it indicates a problem with the functionality of the radar sensor module, potentially compromising the accuracy and reliability of these safety systems.

OBDII Code B390C - Long Range Radar Sensor Module
B390C Code - Long Range Radar Sensor Module

Common Causes of B390C

  1. Electrical connection issues or wiring damage.
  2. Sensor module failure due to environmental factors (moisture, heat, etc.).
  3. Software glitches or calibration errors.
  4. Physical damage to the radar sensor module.
  5. Faulty power supply or control module.

Symptoms of B390C

  1. Malfunction or deactivation of adaptive cruise control.
  2. Inaccurate or inconsistent distance warnings.
  3. Failure of automatic emergency braking system.
  4. Dashboard warning light related to radar sensor system.
  5. Erratic behavior of other ADAS features.

How to Fix B390C

  1. Start by performing a visual inspection of the sensor module and its wiring for any signs of damage or corrosion.
  2. Use a diagnostic scan tool to retrieve the specific fault codes and data related to the long-range radar sensor module.
  3. Check and update the sensor module's software if necessary.
  4. Test the sensor module's functionality by conducting calibration procedures as per manufacturer guidelines.
  5. If the sensor module is deemed faulty, replace it with a new unit and ensure proper installation and calibration.

Cost to Fix B390C

The cost of repairing a long-range radar sensor module can vary depending on the make and model of the vehicle, the brand of the sensor module, and the labor rates in your area. Typically, the parts cost for a new sensor module can range from $500 to $1000, while labor charges can add another $100 to $200. In total, repairing the long-range radar sensor module could cost between $600 and $1200. It's recommended to consult with a professional mechanic or dealership for an accurate estimate based on your specific vehicle and location.

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Code B390C Information for Specific Makes

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 B390C Code

1. What are common symptoms of OBDII code B390C related to the Long Range Radar Sensor Module?

- Common symptoms include issues with adaptive cruise control, blind spot monitoring, and collision avoidance systems.

2. What are possible causes of OBDII code B390C for the Long Range Radar Sensor Module?

- Possible causes include wiring issues, a faulty radar sensor module, sensor misalignment, or software glitches.

3. How can I diagnose OBDII code B390C for the Long Range Radar Sensor Module?

- Diagnosis typically involves using a diagnostic scanner to retrieve the specific error code, checking the radar sensor module and related wiring for damage, and ensuring proper sensor alignment.

4. What repairs are typically needed for OBDII code B390C related to the Long Range Radar Sensor Module?

- Repairs may involve repairing damaged wiring, realigning the radar sensor module, updating software, or replacing the faulty sensor module.

5. Can OBDII code B390C for the Long Range Radar Sensor Module be fixed at home?

- While some basic checks like inspecting wiring connections can be done at home, diagnosing and repairing issues related to the radar sensor module may require professional automotive expertise.

6. How important is it to address OBDII code B390C for the Long Range Radar Sensor Module?

- It is important to address this code promptly as it may affect the proper functioning of important safety features like adaptive cruise control and collision avoidance systems.

7. Will driving with OBDII code B390C for the Long Range Radar Sensor Module cause any harm to the vehicle?

- Driving with this code may result in disabled safety features and compromised radar sensor functionality, potentially impacting the vehicle's ability to detect obstacles and avoid collisions.

8. How much does it typically cost to repair OBDII code B390C related to the Long Range Radar Sensor Module?

- Repair costs can vary depending on the specific issue, but they may range from a few hundred to over a thousand dollars, including parts and labor.

9. Can resetting the OBDII system clear the B390C code for the Long Range Radar Sensor Module?

- Resetting the OBDII system may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to reappear after driving the vehicle.

10. How can I prevent OBDII code B390C from occurring in the future for the Long Range Radar Sensor Module?

- Regularly inspecting the radar sensor module, ensuring proper maintenance, and addressing any warning signs promptly can help prevent the recurrence of this code.

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