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Engine-Codes – Generic – B0091

B0091 Code - Left Front Side Air Bag Satellite Sensor

Quick Answer

The B0091 code refers to a fault in the Left Front Side Air Bag Satellite Sensor. Common causes include Faulty Left Front Side Air Bag Satellite Sensor, Damaged wiring or connectors in the airbag system, Corrosion or poor connection at the sensor. 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
B0091 indicates Left Front Side Air Bag Satellite Sensor .
Common causes
Common causes include Faulty Left Front Side Air Bag Satellite Sensor, Damaged wiring or connectors in the airbag system, Corrosion or poor connection at the sensor.
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 06, 2024
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Code B0091 Description

The B0091 code refers to a fault in the Left Front Side Air Bag Satellite Sensor. This sensor is responsible for detecting impacts on the left front side of the vehicle and deploying the airbag in case of a collision. When this sensor is malfunctioning, it can affect the overall safety of the vehicle as the airbag may not deploy when needed, potentially putting the driver and passengers at risk. The underlying cause of this issue could be a faulty sensor, wiring issues, or a problem with the airbag system itself.

OBDII Code B0091 - Left Front Side Air Bag Satellite Sensor
B0091 Code - Left Front Side Air Bag Satellite Sensor

Common Causes of B0091

  1. Faulty Left Front Side Air Bag Satellite Sensor
  2. Damaged wiring or connectors in the airbag system
  3. Corrosion or poor connection at the sensor
  4. Impact or collision that damaged the sensor
  5. Issues with the airbag control module

Symptoms of B0091

  1. Airbag warning light illuminated on the dashboard
  2. Airbag system error message displayed on the instrument cluster
  3. Airbag may not deploy in a collision
  4. Intermittent or inconsistent airbag deployment
  5. Vehicle may fail airbag system self-test during startup

How to Fix B0091

  1. Diagnose the specific cause of the B0091 code using a diagnostic scanner
  2. Inspect the wiring and connectors for any damage or corrosion
  3. Replace the Left Front Side Air Bag Satellite Sensor if it is found to be faulty
  4. Clear the code and reset the airbag system
  5. Perform a thorough test to ensure proper functionality of the airbag system

Cost to Fix B0091

The typical repair costs for addressing the B0091 code can range from $200 to $500, depending on the specific cause of the issue and the cost of parts and labor. It's important to note that the diagnosis time and labor rates at auto repair shops can vary, so it's recommended to check with local shops for a more accurate estimate. Additionally, factors such as the vehicle make and model, as well as the location of the repair shop, can also impact the overall cost of the repair.

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Code B0091 Information for Specific Makes

Precautions for SRS “AIR BAG” and “SEAT BELT PRE-TENSIONER” Service

  • Never probe the electrical connectors on air bag, side air curtain modules or seat belts.
  • Never disassemble or tamper with safety belt buckle/retractor pretensioners, adaptive load limiting retractors, safety belt inflators, or probe the electrical connectors.
  • Do not use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.
  • Before servicing the SRS, turn ignition switch OFF, disconnect both battery cables and wait at least 3 minutes. For approximately 3 minutes after the cables are removed, it is still possible for the air bag and seat belt pre-tensioner to deploy. Therefore, do not work on any SRS connectors or wires until at least 3 minutes have passed.

Failure to follow this instruction may result in the accidental deployment of these modules, which increases the risk of serious personal injury or death.

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 B0091 Code

1. What are the common symptoms of OBDII code B0091 (Left Front Side Air Bag Satellite Sensor)?

The common symptoms of OBDII code B0091 include the airbag warning light illuminating on the dashboard and potential issues with the left front side airbag system.

2. What are the possible causes of OBDII code B0091?

Possible causes of OBDII code B0091 include a faulty left front side airbag satellite sensor, damaged wiring or connectors in the airbag system, or a malfunction in the airbag control module.

3. How can I diagnose the issue related to OBDII code B0091?

Diagnosing OBDII code B0091 involves using a diagnostic scanner to retrieve the trouble code, inspecting the left front side airbag satellite sensor and its wiring for damage, and checking the airbag system components for any faults.

4. What should I do if I encounter OBDII code B0091?

If you encounter OBDII code B0091, it is recommended to have the issue diagnosed and repaired by a qualified technician to ensure the proper functioning of the left front side airbag system.

5. Can I continue driving my vehicle with OBDII code B0091?

It is not recommended to drive your vehicle with OBDII code B0091 present, as it indicates a potential issue with the left front side airbag system, which is crucial for occupant safety in the event of a collision.

6. How much does it typically cost to repair OBDII code B0091?

The cost of repairing OBDII code B0091 can vary depending on the specific cause of the issue, but it may involve replacing the left front side airbag satellite sensor, repairing damaged wiring, or resetting the airbag system, which could range from a few hundred to over a thousand dollars.

7. Can I reset OBDII code B0091 myself?

While you can clear the trouble code using a diagnostic scanner, it is important to address the underlying issue causing OBDII code B0091 to prevent it from reoccurring and ensure the proper functioning of the left front side airbag system.

8. How long does it take to repair OBDII code B0091?

The repair time for OBDII code B0091 can vary depending on the extent of the issue and the availability of parts, but it typically takes a few hours to a full day to diagnose and repair the left front side airbag satellite sensor problem.

9. Is OBDII code B0091 a common issue in vehicles?

OBDII code B0091 related to the left front side airbag satellite sensor is a relatively common issue in vehicles, especially in older models or those that have been involved in accidents or have experienced electrical problems.

10. How can I prevent OBDII code B0091 from occurring in the future?

To prevent OBDII code B0091 from occurring in the future, it is important to regularly inspect and maintain the airbag system components, address any warning lights or issues promptly, and drive safely to minimize the risk of accidents that could impact the airbag system.

Discuss the causes and fixes for B0091 OBDII Code

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  • Hi,
    I've got a Sprinter Mercedes 315 (W906). I've got a code in the SRS (Airbag calculator) and I would like to know what are the causes of the code (91B7).
    Thank you for your help.

    Reply to Comment