B390C Buick Code - Long Range Radar Sensor Module
Quick Answer
The B390C diagnostic trouble code (DTC) for Buick vehicles refers to a fault in the Long Range Radar Sensor Module. Common causes include Faulty Long Range Radar Sensor Module, Wiring issues or loose connections, Faulty radar sensor. 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 Buick indicates Long Range Radar Sensor Module.
- Common causes
- Common causes include Faulty Long Range Radar Sensor Module, Wiring issues or loose connections, Faulty radar sensor.
- 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 B390C Buick Description
The B390C diagnostic trouble code (DTC) for Buick vehicles refers to a fault in the Long Range Radar Sensor Module. This module is a crucial component of the vehicle's advanced driver assistance systems (ADAS), specifically the adaptive cruise control and collision avoidance systems. The Long Range Radar Sensor Module is responsible for detecting objects and vehicles in the vehicle's vicinity, providing essential data for these safety features to function effectively.
Common Causes of B390C Buick
- Faulty Long Range Radar Sensor Module.
- Wiring issues or loose connections.
- Faulty radar sensor.
- Communication error between the module and other vehicle systems.
- Water or debris intrusion affecting the radar sensor.
Symptoms of B390C Buick
- Adaptive cruise control not working properly or deactivated.
- Loss of collision warning alerts.
- Malfunction indicator light (MIL) illuminated on the dashboard.
- Erratic behavior of other safety features relying on radar sensor data.
How to Fix B390C Buick
- Begin by conducting a thorough diagnostic scan to retrieve the specific trouble codes and identify the root cause of the issue.
- Inspect the wiring harness and connections related to the Long Range Radar Sensor Module for any signs of damage or corrosion. Repair or replace as necessary.
- Test the radar sensor for proper functionality and calibration. Replace if found faulty.
- Check for any software updates or recalibrations required for the Long Range Radar Sensor Module.
- Clear the DTCs and perform a road test to ensure that the adaptive cruise control and collision avoidance systems are functioning correctly.
Cost to Fix B390C Buick
The typical repair costs for addressing the B390C DTC in a Buick vehicle can range from $300 to $800, including parts and labor. However, it is important to note that the specific diagnosis time and labor rates at auto repair shops can vary significantly based on factors such as location, vehicle make and model, and engine type. Most auto repair shops charge between $80 and $150 per hour for labor, but rates may be higher in metropolitan areas or at dealerships, while independent shops may offer lower rates. It is recommended to inquire about local rates to obtain a more accurate estimate for this repair.
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Frequently Asked Questions about B390C Buick Code
1. What does the OBDII code B390C mean on a Buick?
The code B390C indicates an issue with the Long Range Radar Sensor Module, which is responsible for advanced driver-assistance features like adaptive cruise control.
2. What are the common symptoms of a B390C code on a Buick?
Symptoms include malfunctioning adaptive cruise control, forward collision warnings not working, or an illuminated check engine or driver-assistance system warning light.
3. What causes the B390C code to appear on my Buick?
Common causes include a misaligned radar sensor, damaged wiring or connectors, a faulty sensor module, or software issues.
4. How do I fix the B390C code on a Buick?
Repairs may involve recalibrating the radar sensor, inspecting and repairing wiring or connectors, or replacing the sensor module if it’s defective.
5. Can I drive my Buick with the B390C code?
While the vehicle is usually drivable, advanced safety features like adaptive cruise control may not function properly, which could impact safety.
6. How is the B390C code diagnosed on a Buick?
A technician will use a diagnostic scanner to confirm the code, inspect the radar sensor for alignment or damage, and check wiring and connections for faults.
7. Does the Long Range Radar Sensor Module need to be recalibrated after fixing a B390C code?
Yes, recalibration is often necessary after repairs to ensure the radar sensor works accurately with the vehicle's safety systems.
8. Can weather conditions cause the B390C code to trigger?
Yes, heavy rain, snow, or dirt on the radar sensor can temporarily obstruct its function, potentially triggering the code.
9. How much does it cost to repair a B390C code on a Buick?
Repair costs vary but can range from $150 for recalibration to $1,000 or more if the radar sensor module needs replacement.
10. Is the B390C code covered under warranty for my Buick?
It may be covered under the vehicle's powertrain or bumper-to-bumper warranty if the vehicle is still under warranty. Check with your dealership for specifics.
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