AutoCodes – GMC – B0105 GMC

B0105 GMC 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 GMC 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 3,350

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

What does this mean?

What are the Possible Causes of the DTC B0105 GMC?

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 GMC?

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 GMC 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 GMC code?

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

Need Help with the Code?

Get the B0105 GMC 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 GMC Code

1. What are the common symptoms of OBDII code B0105 in a GMC vehicle?

- Common symptoms include the airbag warning light illuminating on the dashboard and a notification indicating a Passenger-Side EFS Incorrect Identification Message.

2. What does the OBDII code B0105 in a GMC vehicle indicate?

- This code specifically refers to a Passenger-Side EFS (Endgate Force Sensor) Incorrect Identification Message, signaling a potential issue with the airbag system.

3. What are the possible causes of OBDII code B0105 in a GMC vehicle?

- The code B0105 can be triggered by a faulty passenger-side airbag, a malfunctioning airbag sensor, wiring issues, or a problem with the airbag control module.

4. How can I diagnose the cause of OBDII code B0105 in my GMC vehicle?

- Diagnosing the code typically involves using an OBDII scanner to retrieve the specific fault codes, conducting a visual inspection of the airbag system components, and testing the sensors and wiring for continuity and proper function.

5. Can I continue driving my GMC vehicle with OBDII code B0105 present?

- It is not recommended to drive the vehicle with the airbag warning light on, as it indicates a potential safety issue with the airbag system. Prompt attention and repair are advisable.

6. How can I repair OBDII code B0105 in my GMC vehicle?

- Repairing this code may involve replacing a faulty passenger-side airbag, repairing or replacing damaged wiring, or recalibrating the airbag system components. It is recommended to consult a professional mechanic for proper diagnosis and repair.

7. Are there any safety concerns associated with OBDII code B0105 in a GMC vehicle?

- Yes, the presence of this code indicates a potential issue with the passenger-side airbag system, which could affect the proper deployment of the airbag in the event of a collision, compromising passenger safety.

8. Is it possible to reset the OBDII code B0105 in a GMC vehicle without fixing the underlying issue?

- Resetting the code without addressing the root cause is not recommended, as the issue will likely persist, potentially compromising the functionality of the airbag system and safety of the vehicle occupants.

9. How much does it cost to repair OBDII code B0105 in a GMC vehicle?

- The cost of repairing this code can vary depending on the specific cause of the issue, parts needed for replacement, and labor costs. It is advisable to obtain quotes from reputable mechanics or dealerships for an accurate estimate.

10. Can OBDII code B0105 in a GMC vehicle be prevented?

- Regular maintenance and inspections of the airbag system, prompt attention to any warning lights or messages, and addressing any issues promptly can help prevent the occurrence of code B0105 in a GMC vehicle.