AutoCodes – Buick – B0102 Buick

B0102 Buick Code - Driver-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 Driver-Side Electronic Frontal Sensor (EFS), Driver-Side Electronic Frontal Sensor (EFS) harness is open or shorted, Driver-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: B0102 Buick indicates Driver-Side EFS Incorrect Identification Message.
Common causes: Common causes include Faulty Driver-Side Electronic Frontal Sensor (EFS), Driver-Side Electronic Frontal Sensor (EFS) harness is open or shorted, Driver-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 1,437

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 B0102 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 B0102 Buick - Driver-Side EFS Incorrect Identification Message - AutoCodes.com — B0102 Buick Code - Driver-Side EFS Incorrect Identification Message

What does this mean?

What are the Possible Causes of the DTC B0102 Buick?

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

How to Fix the DTC B0102 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 B0102 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 B0102 Buick code?

Need more information on how to fix the B0102 Buick code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B0102 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 B0102 Buick Code

1. What are the common symptoms of OBDII code B0102 in a Buick related to Driver-Side EFS Incorrect Identification Message?

The common symptoms include the airbag warning light illuminating on the dashboard and a message indicating "Driver-Side EFS Incorrect Identification" on the instrument panel.

2. What could be the possible causes of OBDII code B0102 in a Buick triggering the Driver-Side EFS Incorrect Identification Message?

The code B0102 in a Buick is often triggered by a faulty electronic front sensor (EFS) module, damaged wiring or connectors, or a malfunctioning airbag control module.

3. How can I diagnose the OBDII code B0102 in a Buick associated with the Driver-Side EFS Incorrect Identification Message?

Diagnosing this code typically involves using an OBDII scanner to retrieve the specific fault code, inspecting the wiring and connectors for any visible damage, and testing the electronic front sensor module for proper functionality.

4. Are there any DIY repair tips for resolving the OBDII code B0102 in a Buick showing the Driver-Side EFS Incorrect Identification Message?

While it is recommended to have a professional diagnose and repair the issue, some DIY tips include checking and ensuring all wiring connections are secure, and resetting the airbag system using a compatible scan tool.

5. Can driving with the OBDII code B0102 in a Buick indicating the Driver-Side EFS Incorrect Identification Message be dangerous?

Driving with this code present can be potentially dangerous as it indicates a fault in the airbag system, which may result in the airbags not deploying properly in the event of a collision.

6. How much does it typically cost to repair the OBDII code B0102 in a Buick related to the Driver-Side EFS Incorrect Identification Message?

The cost of repairing this code can vary depending on the exact cause of the issue, but it may range from $200 to $500, including parts and labor.

7. Is it safe to continue driving my Buick with the airbag warning light on due to the OBDII code B0102 and the Driver-Side EFS Incorrect Identification Message?

It is not recommended to continue driving the vehicle with the airbag warning light on, as it indicates a potential issue with the airbag system that could compromise your safety in the event of a collision.