AutoCodes – Infiniti – B2704 Infiniti

B2704 Infiniti Code - Rear Sonar Sensor Left Outer

Quick Answer

With power and ground supplied to the sonar sensors, the sonar sensors transmit an ultrasonic signal. Common causes include Faulty Rear Sonar Sensor Left Outer, Rear Sonar Sensor Left Outer harness is open or shorted, Rear Sonar Sensor Left Outer 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: B2704 Infiniti indicates Rear Sonar Sensor Left Outer.
Common causes: Common causes include Faulty Rear Sonar Sensor Left Outer, Rear Sonar Sensor Left Outer harness is open or shorted, Rear Sonar Sensor Left Outer 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 2,738

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 25, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2704 Infiniti Description

With power and ground supplied to the sonar sensors, the sonar sensors transmit an ultrasonic signal. This signal is reflected back to the sensor by objects large enough and close enough to be detected. The sonar sensors measure the time from the transmitted signal to the time the signal is reflected back and send this information to the Sonar Control Unit. The Sonar Control Unit sets the Diagnostic Trouble Code (DTC) when the Rear Sonar Sensor Left Outer is out of factory specifications.

OBDII Code B2704 Infiniti - Rear Sonar Sensor Left Outer - AutoCodes.com — B2704 Infiniti Code - Rear Sonar Sensor Left Outer

What does this mean?

What are the Possible Causes of the DTC B2704 Infiniti?

Faulty Rear Sonar Sensor Left Outer
Rear Sonar Sensor Left Outer harness is open or shorted
Rear Sonar Sensor Left Outer circuit poor electrical connection
Faulty Sonar Control Unit

How to Fix the DTC B2704 Infiniti?

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 B2704 Infiniti 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 B2704 Infiniti code?

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Need Help with the Code?

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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 B2704 Infiniti Code

1. What does OBDII code B2704 for an Infiniti rear sonar sensor left outer indicate?

This code indicates a fault in the rear sonar sensor located on the left outer side of the vehicle.

2. What are the common symptoms of a B2704 code in an Infiniti?

Common symptoms include a malfunctioning or non-functional rear parking assist system, with the sensor on the left outer side not working properly.

3. What are the possible causes of the B2704 code in an Infiniti?

Possible causes include a faulty rear sonar sensor, damaged wiring or connectors, or issues with the sensor's placement or alignment.

4. How can I diagnose the issue causing the B2704 code in my Infiniti?

Diagnosis typically involves visually inspecting the rear sonar sensor and its connections, checking for any physical damage, and using a diagnostic scanner to determine the exact nature of the fault.

5. Can I repair the B2704 code in my Infiniti myself?

Depending on the cause of the code, you may be able to repair it yourself by replacing the faulty sensor, repairing damaged wiring, or adjusting the sensor's position. However, professional help may be needed for accurate diagnosis and repair.

6. Are there any tips for preventing the B2704 code from recurring in my Infiniti?

Regularly inspecting the rear sonar sensors for damage, ensuring proper alignment during sensor installation or replacement, and avoiding impacts to the sensors can help prevent the B2704 code from recurring.

7. Is it safe to drive my Infiniti with a B2704 code?

It is generally safe to drive the vehicle with this code, but keep in mind that your rear parking assist system may not function correctly, increasing the risk of accidental collisions while parking.

8. How much does it typically cost to repair a B2704 code in an Infiniti?

The cost of repair can vary depending on the cause of the code, the labor rates of the repair shop, and whether genuine OEM parts are used. It is recommended to obtain quotes from multiple sources.

9. Can a B2704 code be cleared without fixing the underlying issue?

While you can clear the code with a diagnostic scanner, it is crucial to address the underlying problem causing the B2704 code to prevent safety risks and ensure the proper functioning of your rear parking assist system.

10. Will a B2704 code affect my Infiniti's overall performance?

The B2704 code itself may not affect the vehicle's performance, but it can impact the functionality of the rear parking assist system, which is designed to enhance safety and convenience while parking.