AutoCodes – Generic – B390A

B390A Code - Short Range Object Sensor Performance

Quick Answer

The Radar Sensor Module short range performs internal fault detection on itself. 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: B390A indicates Short Range Object Sensor Performance.
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 2,253

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 B390A Description

The Radar Sensor Module short range performs internal fault detection on itself. The Diagnostic Trouble Code (DTC) sets when the Radar Sensor Module short range continually runs the program to detect faults.

OBDII Code B390A - Short Range Object Sensor Performance - AutoCodes.com — B390A Code - Short Range Object Sensor Performance

What does this mean?

What are the Possible Causes of the DTC B390A?

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

How to Fix the DTC B390A?

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 B390A 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 B390A code?

Need more information on how to fix the B390A code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B390A code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B390A Buick — Short Range Object Sensor Performance
B390A Cadillac — Short Range Object Sensor Performance
B390A Chevrolet — Short Range Object Sensor Performance
B390A GMC — Short Range Object Sensor Performance

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 B390A Code

1. What are the common symptoms of OBDII code B390A (Short Range Object Sensor Performance)?

- Common symptoms include erratic behavior of the short-range object sensor, false alerts, or complete sensor failure.

2. What are the possible causes of OBDII code B390A?

- Potential causes include sensor malfunctions, wiring issues, sensor calibration problems, or sensor alignment issues.

3. How can I diagnose the Short Range Object Sensor Performance issue related to code B390A?

- Diagnose the issue by conducting a visual inspection of the sensor and its wiring, checking for any visible damage or loose connections. Use an OBDII scanner to retrieve and analyze the specific fault codes.

4. How can I repair OBDII code B390A related to Short Range Object Sensor Performance?

- Repair options include recalibrating the sensor, replacing faulty wiring, realigning the sensor, or replacing the sensor itself if necessary.

5. Can a DIY enthusiast fix OBDII code B390A at home?

- Depending on your skill level and access to tools, a DIY enthusiast may be able to address simpler causes of the issue, such as checking and securing wiring connections. However, more complex repairs may require professional assistance.

6. Are there any safety concerns associated with OBDII code B390A?

- While the code itself does not pose direct safety risks, a malfunctioning short-range object sensor can impact the performance of safety features like parking assist systems. It's important to address the issue promptly to ensure proper functionality.

7. What are the potential long-term effects of ignoring OBDII code B390A?

- Ignoring the code may lead to continued sensor malfunctions, reduced accuracy of safety features, or complete sensor failure, which can compromise your vehicle's safety and performance.

8. Can extreme weather conditions affect the Short Range Object Sensor Performance related to OBDII code B390A?

- Yes, extreme weather conditions like heavy rain, snow, or extreme temperatures can impact the sensor's performance, leading to false alerts or sensor malfunctions.

9. How can I prevent OBDII code B390A from reoccurring in the future?

- Regularly inspect and maintain the short-range object sensor, ensure proper sensor alignment and calibration, and address any issues promptly to prevent the code from reoccurring.

10. Is it necessary to reset the OBDII system after repairing OBDII code B390A?

- It's recommended to clear the OBDII system after repairing the issue to reset the fault code and ensure the system recognizes the repairs.