B390C Buick 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 Buick 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.
Code B390C Buick Description
What are the Possible Causes of the DTC B390C Buick?
- 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 Buick?
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 Buick 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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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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