AutoCodes – Generic – B2728

B2728 Code - Sonar System Off Switch

Quick Answer

The sonar system off switch is used to turn the sonar system ON/OFF. Common causes include Faulty Sonar System Off Switch, Sonar System Off Switch harness is open or shorted, Sonar System Off Switch 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: B2728 indicates Sonar System Off Switch.
Common causes: Common causes include Faulty Sonar System Off Switch, Sonar System Off Switch harness is open or shorted, Sonar System Off Switch 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 966

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 Jan 26, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2728 Description

The sonar system off switch is used to turn the sonar system ON/OFF. The Sonar Control Unit sets the Diagnostic Trouble Code (DTC) when the Sonar System Off Switch is out of factory specifications.

OBDII Code B2728 - Sonar System Off Switch - AutoCodes.com — B2728 Code - Sonar System Off Switch

What does this mean?

What are the Possible Causes of the DTC B2728?

Faulty Sonar System Off Switch
Sonar System Off Switch harness is open or shorted
Sonar System Off Switch circuit poor electrical connection
Faulty Sonar Control Unit

How to Fix the DTC B2728?

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 B2728 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 B2728 code?

Need more information on how to fix the B2728 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B2728 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B2728 Infiniti — Sonar System Off Switch
B2728 Nissan — Sonar System Off Switch

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 B2728 Code

1. What does OBDII code B2728 indicate?

The code B2728 refers to the Sonar System Off Switch, indicating a problem with the vehicle's parking assist system.

2. What are the common symptoms of OBDII code B2728?

Common symptoms include the parking assist system not functioning properly, disabled sonar sensors, and warning lights on the dashboard.

3. What are the possible causes of OBDII code B2728?

Possible causes of code B2728 include a faulty sonar system off switch, damaged wiring or connectors in the parking assist system, or a malfunctioning control module.

4. How can I diagnose the issue related to OBDII code B2728?

Diagnose the problem by inspecting the sonar system off switch, checking the wiring and connectors for any damage, and using a scan tool to read the trouble codes stored in the system.

5. Can I still drive my vehicle with OBDII code B2728 present?

While it may be possible to drive the vehicle with the code present, it is recommended to have the issue diagnosed and repaired to ensure the proper functioning of the parking assist system.

6. How can I repair OBDII code B2728?

Repair options may include replacing the faulty sonar system off switch, repairing any damaged wiring or connectors, or reprogramming the control module as needed.

7. Is it safe to ignore OBDII code B2728?

Ignoring the code may result in the parking assist system not working correctly, leading to potential difficulties in parking or maneuvering the vehicle. It is advisable to address the issue promptly.

8. Can OBDII code B2728 be reset without repairs?

Resetting the code without addressing the underlying issue may temporarily clear the warning lights, but the problem is likely to recur until the root cause is fixed.

9. How much does it typically cost to repair OBDII code B2728?

The cost of repair for OBDII code B2728 can vary depending on the specific cause of the issue, parts needed for replacement, and labor charges. Consulting a mechanic for an accurate estimate is recommended.

10. How long does it take to repair OBDII code B2728?

The repair time for OBDII code B2728 can vary based on the complexity of the issue and the availability of parts. Simple fixes like replacing a switch may take less time, while extensive wiring repairs could require more labor.