AutoCodes – Pontiac – B0105 Pontiac

B0105 Pontiac 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 Pontiac 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 1,148

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

What does this mean?

What are the Possible Causes of the DTC B0105 Pontiac?

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 Pontiac?

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 Pontiac 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 Pontiac code?

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

Need Help with the Code?

Get the B0105 Pontiac 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 Pontiac Code

1. What does the OBDII code B0105 for a Pontiac indicate?

The B0105 code on a Pontiac indicates an issue with the Passenger-Side Electronic Frontal Sensor (EFS), specifically an incorrect identification message received by the control unit.

2. What are the common symptoms of code B0105 in a Pontiac?

Symptoms may include the airbag warning light illuminating on the dashboard, potential non-deployment of the passenger-side airbag in a collision, and possible error messages displayed on the dashboard regarding the airbag system.

3. What can cause the B0105 code to appear in a Pontiac?

Causes can include a faulty passenger-side frontal sensor, damaged wiring or connectors related to the EFS, or a malfunction in the airbag control module.

4. How is the B0105 code diagnosed in a Pontiac?

Diagnosis involves using an OBDII scanner to confirm the code, visually inspecting the wiring and connectors for damage, and checking the functionality of the passenger-side frontal sensor and airbag control module.

5. What are the steps to repair the B0105 code on a Pontiac?

Repair steps typically include replacing the faulty passenger-side frontal sensor, repairing or replacing any damaged wiring or connectors, and potentially replacing or reprogramming the airbag control module if necessary.

6. Is it safe to drive a Pontiac with the B0105 code?

Driving with this code is not recommended as it indicates a problem with the airbag system, which could affect the deployment of airbags in an accident, posing a risk to passenger safety.

7. Can the B0105 code affect other systems in my Pontiac?

While the B0105 code specifically relates to the passenger-side airbag system, it does not typically affect other vehicle systems directly. However, it is crucial to address any airbag system malfunctions promptly.

8. What tools are needed to diagnose the B0105 code on a Pontiac?

Tools needed include an OBDII scanner to read the code and possibly a multimeter to test wiring continuity and sensor functionality. Additional specialized tools might be required for deeper diagnostic procedures or repairs.

9. How often does the B0105 code occur in Pontiacs?

The occurrence of the B0105 code is not extremely common but can happen, particularly in vehicles that have experienced frontal impacts or have aging electrical components.

10. What should I do if the B0105 code reappears after repairs on my Pontiac?

If the B0105 code reappears, it suggests that the initial repair may not have fully addressed the underlying issue or there might be additional faults in the airbag system. It is advisable to conduct a thorough re-diagnosis and possibly consult with a professional technician specializing in airbag systems.