AutoCodes – Chevrolet – B0105 Chevrolet

B0105 Chevrolet 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 Chevrolet 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 2,786

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

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

What does this mean?

What are the Possible Causes of the DTC B0105 Chevrolet?

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 Chevrolet?

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 Chevrolet 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 Chevrolet code?

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

Need Help with the Code?

Get the B0105 Chevrolet 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 Chevrolet Code

1. What are the common symptoms of OBDII code B0105 in a Chevrolet, known as Passenger-Side EFS Incorrect Identification Message?

The common symptoms include the airbag warning light staying on, the passenger-side airbag not deploying in an accident, and potential issues with the electronic front sensor (EFS) system.

2. What could cause the OBDII code B0105 in a Chevrolet?

The code B0105 typically indicates a problem with the passenger-side EFS module, faulty wiring or connections, or a malfunctioning sensor.

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

Diagnosing the issue may involve using an OBDII scanner to read the specific fault code, inspecting the wiring and connections related to the passenger-side EFS module, and testing the sensor for proper functionality.

4. Is it safe to drive with OBDII code B0105 present in a Chevrolet?

It is not recommended to drive with this code present, as it may indicate a problem with the airbag system, potentially compromising passenger safety in the event of a collision.

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

Repairing the code may involve checking and repairing any damaged wiring or connections, replacing the passenger-side EFS module, or recalibrating the sensor as necessary.

6. Can I reset the OBDII code B0105 in my Chevrolet without fixing the underlying issue?

While you can clear the code with an OBDII scanner, it is important to address the root cause of the problem to ensure the airbag system functions correctly.

7. Are there any DIY tips for fixing OBDII code B0105 in a Chevrolet?

DIY tips may include checking the connections and wiring for any visible damage, ensuring the sensor is securely in place, and following the manufacturer's service manual for specific repair procedures.

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

The cost of repair can vary depending on the exact cause of the issue, but it may involve parts costs for a new EFS module, sensor, or wiring repairs, along with labor costs if taken to a professional mechanic.

9. Can OBDII code B0105 be triggered by a loose connection or bad ground?

Yes, a loose connection or bad ground related to the passenger-side EFS module or sensor can trigger the B0105 code in a Chevrolet.

10. Is it necessary to have the OBDII code B0105 cleared by a mechanic after repairing the issue?

It is recommended to have a mechanic clear the code using an OBDII scanner after repairing the underlying problem to ensure the airbag system is functioning properly and the warning light is no longer illuminated.