AutoCodes – Generic – B2708

B2708 Code - Rear Sonar Sensor Left Inner

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 Inner, Rear Sonar Sensor Left Inner harness is open or shorted, Rear Sonar Sensor Left Inner 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: B2708 indicates Rear Sonar Sensor Left Inner.
Common causes: Common causes include Faulty Rear Sonar Sensor Left Inner, Rear Sonar Sensor Left Inner harness is open or shorted, Rear Sonar Sensor Left Inner 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 1,551

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 B2708 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 Inner is out of factory specifications.

OBDII Code B2708 - Rear Sonar Sensor Left Inner - AutoCodes.com — B2708 Code - Rear Sonar Sensor Left Inner

What does this mean?

What are the Possible Causes of the DTC B2708?

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

How to Fix the DTC B2708?

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 B2708 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 B2708 code?

Need more information on how to fix the B2708 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B2708 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B2708 Buick — Gearshift Unlock Circuit High
B2708 Cadillac — Gearshift Unlock Circuit High
B2708 Chevrolet — Gearshift Unlock Circuit High
B2708 GMC — Gearshift Unlock Circuit High
B2708 Infiniti — Rear Sonar Sensor Left Inner
B2708 Nissan — Rear Sonar Sensor Left Inner

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 B2708 Code

1. What are the common symptoms of OBDII code B2708 (Rear Sonar Sensor Left Inner)?

- The common symptoms include a malfunctioning rear sonar system, inaccurate distance readings, and a warning light on the dashboard.

2. What can cause OBDII code B2708 to trigger?

- The code B2708 is triggered when the rear sonar sensor on the left inner side of the vehicle is not functioning properly or has a communication error.

3. How can I diagnose the issue related to code B2708?

- To diagnose the issue, you can use an OBDII scanner to read the code, visually inspect the rear sonar sensor, and test the sensor's functionality.

4. What are the possible repair options for OBDII code B2708?

- The repair options may include checking and cleaning the sensor connections, replacing the faulty rear sonar sensor, or addressing any wiring issues.

5. Can I drive my vehicle with OBDII code B2708 active?

- It is generally safe to drive the vehicle with the code B2708, but it is recommended to address the issue promptly to ensure the proper functioning of the rear sonar system.

6. How important is the rear sonar sensor in the vehicle's safety system?

- The rear sonar sensor plays a crucial role in assisting the driver with parking and detecting obstacles behind the vehicle, enhancing safety and convenience.

7. Are there any DIY tips for troubleshooting OBDII code B2708?

- DIY tips may include checking the sensor for any physical damage, ensuring it is securely mounted, and verifying the sensor's connections for any corrosion or loose wires.

8. What are the potential risks of ignoring OBDII code B2708?

- Ignoring the code B2708 may lead to inaccurate distance readings, potential collisions while parking, and a compromised rear safety system.

9. How long does it typically take to repair OBDII code B2708?

- The repair time can vary depending on the exact cause of the issue, but it may take anywhere from 30 minutes to a few hours to diagnose and fix the problem.

10. Can extreme weather conditions affect the rear sonar sensor and trigger OBDII code B2708?

- Yes, extreme weather conditions such as heavy rain, snow, or extreme temperatures can potentially affect the performance of the rear sonar sensor and lead to code B2708 activation.