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Engine-Codes – Generic – B0105

B0105 Code - Passenger-Side EFS Incorrect Identification Message

Quick Answer

The B0105 diagnostic trouble code (DTC) indicates a problem with the Passenger-Side Electronic Front Sensor (EFS) Incorrect Identification Message. Common causes include Faulty passenger-side EFS sensor, Wiring or connector issues in the airbag system, Software or programming errors in the vehicle's onboard computer. 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
B0105 indicates Passenger-Side EFS Incorrect Identification Message.
Common causes
Common causes include Faulty passenger-side EFS sensor, Wiring or connector issues in the airbag system, Software or programming errors in the vehicle's onboard computer.
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 10, 2024
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Code B0105 Description

The B0105 diagnostic trouble code (DTC) indicates a problem with the Passenger-Side Electronic Front Sensor (EFS) Incorrect Identification Message. In modern vehicles, electronic sensors play a crucial role in monitoring and controlling various systems to ensure optimal performance and safety. The EFS is responsible for detecting and relaying information about the passenger-side airbag system to the vehicle's onboard computer.

OBDII Code B0105 - Passenger-Side EFS Incorrect Identification Message
B0105 Code - Passenger-Side EFS Incorrect Identification Message

Common Causes of B0105

  1. Faulty passenger-side EFS sensor
  2. Wiring or connector issues in the airbag system
  3. Software or programming errors in the vehicle's onboard computer
  4. Damage to the airbag control module
  5. Corrosion or moisture intrusion affecting sensor functionality

Symptoms of B0105

  1. Airbag warning light illuminated on the dashboard
  2. Inconsistent or intermittent airbag deployment
  3. Inability to turn off the passenger-side airbag
  4. Loss of communication with the passenger-side airbag sensor

How to Fix B0105

  1. Begin by connecting a diagnostic scanner to the vehicle's onboard computer to retrieve the specific error codes and data related to the passenger-side EFS Incorrect Identification Message.
  2. Inspect the passenger-side EFS sensor, wiring, connectors, and related components for any visible damage, corrosion, or loose connections.
  3. Test the sensor's functionality using a multimeter or specialized diagnostic tools to ensure it is transmitting accurate data to the onboard computer.
  4. If necessary, replace the faulty sensor, repair damaged wiring or connectors, and reprogram the airbag control module to address any software-related issues.
  5. Clear the error codes from the onboard computer and conduct a final test to verify that the issue has been resolved and that the passenger-side airbag system is functioning correctly.

Cost to Fix B0105

The typical repair costs for addressing a passenger-side EFS Incorrect Identification Message can vary depending on the specific cause of the issue and the extent of the repairs needed. In general, replacement of the EFS sensor and related components may range from $200 to $500, including parts and labor. Additional costs for diagnostic testing, wiring repairs, or software reprogramming may also apply.

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Code B0105 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 B0105 Code

1. What does the OBDII code B0105 mean?

B0105 indicates that the passenger-side Electronic Front Sensor (EFS) is sending an incorrect identification message to the airbag control module.

2. What are the common symptoms of code B0105?

Symptoms can include the airbag warning light illuminating on the dashboard and possible deactivation of the passenger-side airbag system.

3. What causes the B0105 code to trigger?

The code can be caused by a faulty passenger-side EFS, damaged wiring or connectors, corrosion in the electrical connections, or a malfunctioning airbag control module.

4. Is it safe to drive with the B0105 code active?

It is not recommended because the passenger-side airbag system may not deploy correctly in an accident, potentially compromising passenger safety.

5. How is the B0105 code diagnosed?

A technician will use a scan tool to verify the code, inspect the EFS and its wiring for damage or corrosion, and test the airbag control module for proper function.

6. Can the B0105 code be fixed by resetting the system?

Resetting the system might clear the code temporarily, but the underlying issue needs to be repaired to prevent the code from returning.

7. How much does it typically cost to repair a B0105 code?

Repair costs can vary widely, ranging from $100 to $600 or more, depending on whether the issue is a simple wiring repair or a replacement sensor/module.

8. Can I fix the B0105 code myself?

If you have experience with automotive electronics, you can inspect and repair wiring or connectors. However, replacing sensors or working on the airbag system is best left to professionals.

9. What tools are needed to diagnose the B0105 code?

Tools may include an OBDII scanner, a multimeter to check wiring continuity, and possibly special tools for working on the airbag system.

10. Will a faulty EFS always trigger the B0105 code?

Not always; a faulty EFS may trigger other airbag-related codes depending on the vehicle's make and model. A thorough diagnosis is necessary.

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