AutoCodes – Generic – B2701

B2701 Code - Front Sonar Sensor Left Outer Harness

Quick Answer

With power and ground supplied to the sonar sensors, the sonar sensors transmit an ultrasonic signal. Common causes include Faulty Front Sonar Sensor Left Outer, Front Sonar Sensor Left Outer harness is open or shorted, Front 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
B2701 indicates Front Sonar Sensor Left Outer Harness.
Common causes
Common causes include Faulty Front Sonar Sensor Left Outer, Front Sonar Sensor Left Outer harness is open or shorted, Front 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 1,139
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jan 25, 2020
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Code B2701 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 Front Sonar Sensor Left Outer is out of factory specifications.
OBDII Code B2701 - Front Sonar Sensor Left Outer Harness - AutoCodes.com
B2701 Code - Front Sonar Sensor Left Outer Harness

What are the Possible Causes of the DTC B2701?

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

How to Fix the DTC B2701?

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 B2701 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 B2701 code?

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Need Help with the Code?

Get the B2701 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

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 B2701 Code

1. What are the common symptoms of an OBDII code B2701 related to the Front Sonar Sensor Left Outer Harness?

The common symptoms include malfunctioning or erratic behavior of the front left parking assist system, such as false alerts or complete failure.

2. What are the typical causes of the OBDII code B2701 indicating an issue with the Front Sonar Sensor Left Outer Harness?

The code B2701 is usually triggered by a damaged or faulty front sonar sensor left outer harness, which may be due to wiring issues, water damage, or physical damage.

3. How can I diagnose the Front Sonar Sensor Left Outer Harness issue causing the OBDII code B2701?

You can diagnose the problem by visually inspecting the wiring harness for any visible damage, testing the continuity of the wires, and using a scan tool to check for specific sensor malfunctions.

4. Are there any DIY repair tips for fixing the Front Sonar Sensor Left Outer Harness issue associated with the OBDII code B2701?

DIY repair tips include repairing or replacing damaged wiring, ensuring proper connections, and clearing the trouble code with a scan tool after the repair.

5. Can a malfunctioning Front Sonar Sensor Left Outer Harness lead to safety concerns for the vehicle?

Yes, a malfunctioning front sonar sensor left outer harness can compromise the accuracy of the parking assist system, potentially leading to safety concerns like collisions or difficulty in parking.

6. Is it possible to drive the vehicle with the OBDII code B2701 related to the Front Sonar Sensor Left Outer Harness without immediate repairs?

While it may be possible to drive the vehicle with this code, it is recommended to address the issue promptly to avoid further complications or safety risks.

7. How much does it typically cost to repair or replace the Front Sonar Sensor Left Outer Harness linked to the OBDII code B2701?

The cost of repair or replacement can vary depending on the extent of the damage and the labor rates, but it may range from $100 to $300 in most cases.

8. Will resetting the OBDII code B2701 related to the Front Sonar Sensor Left Outer Harness make the issue go away permanently?

Resetting the code without addressing the underlying problem will not resolve the issue permanently. It is essential to diagnose and fix the root cause to prevent the code from reoccurring.

9. Are there any preventive measures to avoid encountering the OBDII code B2701 associated with the Front Sonar Sensor Left Outer Harness in the future?

Regularly inspecting the wiring harness for signs of damage, avoiding water exposure, and driving cautiously to prevent physical damage to the sensor can help prevent the recurrence of this code.

10. Can a professional mechanic help with diagnosing and repairing the Front Sonar Sensor Left Outer Harness problem triggering the OBDII code B2701?

Yes, seeking assistance from a professional mechanic or automotive technician is recommended for accurate diagnosis and proper repair of the Front Sonar Sensor Left Outer Harness issue indicated by the OBDII code B2701.

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