AutoCodes – Buick – B0105 Buick

B0105 Buick Code - Passenger-Side EFS Incorrect Identification Message

Quick Answer

Electronic Frontal Sensor (EFS), also known as a front end sensor, uses a unidirectional 2-wire circuit. Common causes include Faulty Passenger-Side Electronic Frontal Sensor (EFS), Passenger-Side Electronic Frontal Sensor (EFS) harness is open or shorted, Passenger-Side Electronic Frontal Sensor (EFS) 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: B0105 Buick indicates Passenger-Side EFS Incorrect Identification Message.
Common causes: Common causes include Faulty Passenger-Side Electronic Frontal Sensor (EFS), Passenger-Side Electronic Frontal Sensor (EFS) harness is open or shorted, Passenger-Side Electronic Frontal Sensor (EFS) 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 1,215

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B0105 Buick Description

Electronic Frontal Sensor (EFS), also known as a front end sensor, uses a unidirectional 2-wire circuit. EFS sensor modulates current on the interface to send identification, State Of Health (SOH) and deployment commands to Sensing and Diagnostic Module (SDM). The SDM serves as a power source and ground for EFS. When ignition is turned on and EFS detects power from SDM, EFS responds by performing internal diagnostics and sending identification to SDM. SDM considers identification message to be valid if received within 5 seconds of EFS powering up. EFS continually communicates a status message to SDM. When fault is detected, SDM will attempt to reset EFS twice by removing and applying power. If fault is still present, SDM will set a Diagnostic Trouble Code (DTC).

OBDII Code B0105 Buick - Passenger-Side EFS Incorrect Identification Message - AutoCodes.com — B0105 Buick Code - Passenger-Side EFS Incorrect Identification Message

What does this mean?

What are the Possible Causes of the DTC B0105 Buick?

Faulty Passenger-Side Electronic Frontal Sensor (EFS)
Passenger-Side Electronic Frontal Sensor (EFS) harness is open or shorted
Passenger-Side Electronic Frontal Sensor (EFS) circuit poor electrical connection
Faulty Sensing and Diagnostic Module (SDM)

How to Fix the DTC B0105 Buick?

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 B0105 Buick 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 B0105 Buick code?

Need more information on how to fix the B0105 Buick code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B0105 Buick code diagnosed by a professional: Find a repair shop in your area

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 Buick Code

1. What are the common symptoms of OBDII code B0105 in a Buick related to the Passenger-Side EFS Incorrect Identification Message?

Common symptoms include the airbag warning light illuminating on the dashboard and a message indicating "Passenger-Side EFS Incorrect Identification" displayed on the vehicle's information screen.

2. What could be causing the OBDII code B0105 in a Buick?

The most common cause of code B0105 in a Buick is a faulty Passenger Presence Module (PPM) or a malfunction in the wiring connecting the PPM to the airbag control module.

3. How can I diagnose the cause of OBDII code B0105 in my Buick?

To diagnose code B0105, it is recommended to use a diagnostic scanner to retrieve the specific fault codes stored in the airbag control module. Additionally, inspecting the wiring harness and connectors for any damage or corrosion is crucial.

4. Can I continue driving my Buick with OBDII code B0105 present?

It is not advisable to continue driving your Buick with OBDII code B0105 present, as this code indicates a potential issue with the passenger-side airbag system, which may compromise occupant safety in the event of a collision.

5. How can I repair OBDII code B0105 in my Buick?

The repair process for code B0105 typically involves replacing the faulty Passenger Presence Module (PPM) and ensuring all wiring connections are secure and free of damage. It is recommended to seek professional assistance for this repair.

6. Are there any DIY tips for troubleshooting OBDII code B0105 in a Buick?

As a DIY tip, you can start by checking the wiring harness and connectors for any visible damage or loose connections. However, for a comprehensive diagnosis and repair, it is best to consult a qualified mechanic or technician.

7. Is it safe to reset the OBDII code B0105 in my Buick using a scanner?

Resetting the OBDII code B0105 may temporarily turn off the warning light, but it will not fix the underlying issue causing the fault code. It is crucial to diagnose and address the root cause of the problem to ensure the safety and functionality of the airbag system.

8. How much does it typically cost to repair OBDII code B0105 in a Buick?

The cost of repairing OBDII code B0105 in a Buick can vary depending on the specific model, the extent of the damage, and labor rates in your area. It is advisable to obtain quotes from different repair shops to compare prices.

9. Can extreme temperatures or humidity affect the occurrence of OBDII code B0105 in a Buick?

Extreme temperatures or humidity levels can potentially impact the operation of the airbag system components, including the Passenger Presence Module (PPM). It is essential to keep your vehicle well-maintained to minimize the risk of such issues.

10. Is OBDII code B0105 a common problem in Buick vehicles?

While OBDII code B0105 related to the Passenger-Side EFS Incorrect Identification Message is not as common as some other codes, it can still occur in Buick vehicles, especially in models equipped with advanced airbag systems. Regular maintenance and prompt repairs can help prevent this issue.