AutoCodes – Generic – B390C

B390C Code - Long Range Radar Sensor Module

Quick Answer

After replacement, the Radar Sensor Module long range must complete an alignment procedure. Common causes include Faulty Radar Sensor Module, Radar Sensor Module harness is open or shorted, Radar Sensor Module circuit poor electrical connection. 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 Faulty Radar Sensor Module, Radar Sensor Module harness is open or shorted, Radar Sensor Module circuit poor electrical connection.
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.

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Code Popularity 1,722

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 25, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B390C Description

After replacement, the Radar Sensor Module long range must complete an alignment procedure. The alignment procedure can be completed by driving the vehicle for approximately 30 min. The Diagnostic Trouble Code (DTC) sets when the Radar Sensor Module long range was unable to complete the alignment process within approximately 30 min of drive time.

OBDII Code B390C - Long Range Radar Sensor Module - AutoCodes.com — B390C Code - Long Range Radar Sensor Module

What does this mean?

What are the Possible Causes of the DTC B390C?

Faulty Radar Sensor Module
Radar Sensor Module harness is open or shorted
Radar Sensor Module circuit poor electrical connection

How to Fix the DTC B390C?

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 B390C 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 B390C code?

Need more information on how to fix the B390C code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B390C code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B390C Buick — Long Range Radar Sensor Module
B390C Cadillac — Long Range Radar Sensor Module
B390C Chevrolet — Long Range Radar Sensor Module
B390C GMC — Long Range Radar Sensor Module

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.