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B2720 Infiniti Code - Rear Sonar Sensor Left Outer

Quick Answer

The B2720 Infiniti code indicates a problem with the rear sonar sensor located on the left outer side of the vehicle. Common causes include Sensor damage due to physical impact or corrosion, Electrical issues such as a faulty wiring connection or short circuit, Software malfunction in the parking assist system. 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
B2720 Infiniti indicates Rear Sonar Sensor Left Outer.
Common causes
Common causes include Sensor damage due to physical impact or corrosion, Electrical issues such as a faulty wiring connection or short circuit, Software malfunction in the parking assist system.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 08, 2024
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Code B2720 Infiniti Description

The B2720 Infiniti code indicates a problem with the rear sonar sensor located on the left outer side of the vehicle. This sensor is part of the parking assist system, which helps drivers navigate tight spaces by alerting them to obstacles behind the vehicle. When this sensor malfunctions, it can affect the accuracy and reliability of the parking assist system, potentially leading to difficulty in parking and an increased risk of accidents.

OBDII Code B2720 Infiniti - Rear Sonar Sensor Left Outer
B2720 Infiniti Code - Rear Sonar Sensor Left Outer

Common Causes of B2720 Infiniti

  1. Sensor damage due to physical impact or corrosion.
  2. Electrical issues such as a faulty wiring connection or short circuit.
  3. Software malfunction in the parking assist system.
  4. Sensor misalignment or calibration error.
  5. Water intrusion or debris blocking the sensor.

Symptoms of B2720 Infiniti

  1. Parking assist system not functioning or giving inaccurate readings.
  2. Constant beeping or warning lights related to the parking assist system.
  3. Difficulty in parking or maneuvering in tight spaces.
  4. Blind spots or obstacles not detected by the parking assist system.

How to Fix B2720 Infiniti

  1. Begin by diagnosing the exact cause of the issue using a diagnostic tool to pinpoint the faulty sensor.
  2. Inspect the sensor and its wiring for any physical damage, corrosion, or loose connections. Replace or repair as necessary.
  3. Check the sensor alignment and calibration to ensure it is properly configured.
  4. Clear any debris or obstructions that may be blocking the sensor's operation.
  5. Test the parking assist system after the repair to confirm that the issue has been resolved.

Cost to Fix B2720 Infiniti

The cost of repairing a rear sonar sensor left outer issue can vary depending on the extent of the damage and the specific parts needed for the repair. On average, the cost of replacing a rear sonar sensor can range from $200 to $400, including parts and labor. However, additional costs may apply if there are underlying electrical or calibration issues that need to be addressed. It is advisable to consult with a professional mechanic or dealership for a more accurate estimate based on the specific vehicle make and model. Keep in mind that labor rates can vary between auto repair shops, so it's recommended to compare prices and services before proceeding with the repair.

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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 B2720 Infiniti Code

1. What are the common symptoms of OBDII code B2720 Infiniti Rear Sonar Sensor Left Outer?

The common symptoms include a malfunctioning or disabled rear sonar sensor on the left outer side of the vehicle, leading to issues with the parking assist system.

2. What could be the possible causes of OBDII code B2720 in an Infiniti related to the Rear Sonar Sensor Left Outer?

The code B2720 is usually triggered by a faulty rear sonar sensor on the left outer side, wiring issues, or a problem with the sensor's connection.

3. How can I diagnose the problem associated with OBDII code B2720 in an Infiniti Rear Sonar Sensor Left Outer?

You can diagnose the issue by visually inspecting the rear sonar sensor on the left outer side for any physical damage, checking the wiring for any signs of wear or corrosion, and using a diagnostic scan tool to identify the exact problem.

4. What are some repair tips for fixing OBDII code B2720 in an Infiniti Rear Sonar Sensor Left Outer?

Repair tips include replacing the faulty rear sonar sensor on the left outer side, repairing or replacing damaged wiring, and ensuring a secure and proper connection of the sensor.

5. Can I fix the OBDII code B2720 issue in an Infiniti Rear Sonar Sensor Left Outer myself?

If you have experience with automotive repairs and access to the necessary tools, you may be able to fix the issue yourself by following the repair tips provided. However, if you are unsure or uncomfortable with the repair process, it's best to seek professional help.

6. Will driving with OBDII code B2720 Infiniti Rear Sonar Sensor Left Outer affect the vehicle's performance?

Driving with this code may not significantly impact the vehicle's performance, but it can lead to the parking assist system not functioning correctly, potentially resulting in difficulty with parking or maneuvering in tight spaces.

7. How urgent is it to address OBDII code B2720 in an Infiniti Rear Sonar Sensor Left Outer?

While it may not be a critical issue for the vehicle's immediate functionality, addressing the problem promptly is recommended to ensure the proper operation of the parking assist system and overall safety while parking.

8. What are the potential risks of ignoring OBDII code B2720 related to the Rear Sonar Sensor Left Outer in an Infiniti?

Ignoring the code may lead to continued issues with the parking assist system, potentially resulting in difficulty judging distances while parking and increasing the risk of collisions or accidents.

9. Is it possible for the OBDII code B2720 in an Infiniti Rear Sonar Sensor Left Outer to reset on its own?

In some cases, the code may reset on its own if the underlying issue was temporary. However, if the problem persists, it is recommended to diagnose and address it to prevent further issues with the parking assist system.

10. How much does it typically cost to repair OBDII code B2720 in an Infiniti related to the Rear Sonar Sensor Left Outer?

The cost of repair can vary depending on the exact cause of the issue, the need for parts replacement, and labor charges. It is advisable to consult a mechanic or dealership for a more accurate estimate based on your specific situation.

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