AutoCodes – Chevrolet – B0102 Chevrolet

B0102 Chevrolet 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 Chevrolet 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 2,811

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

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

What does this mean?

What are the Possible Causes of the DTC B0102 Chevrolet?

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 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 B0102 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 B0102 Chevrolet code?

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

Need Help with the Code?

Get the B0102 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 B0102 Chevrolet Code

1. What are the common symptoms of OBDII code B0102 in a Chevrolet, indicating a Driver-Side EFS Incorrect Identification Message?

The common symptoms include the airbag warning light illuminating on the dashboard and possible issues with the airbag system's functionality.

2. What are the possible causes of OBDII code B0102 in a Chevrolet?

The code B0102 typically indicates a fault with the driver-side electronic front sensor (EFS), which can be caused by a faulty EFS module, wiring issues, or a malfunction in the airbag control module.

3. How can I diagnose the cause of OBDII code B0102 in my Chevrolet?

Diagnosing the issue involves using a professional OBDII scanner to retrieve the specific trouble codes, inspecting the EFS wiring and connections, testing the EFS module for proper functioning, and checking the airbag control module for faults.

4. Can I repair OBDII code B0102 in my Chevrolet myself?

While diagnosing the issue can be done by an experienced DIYer, repairing OBDII code B0102 usually requires specialized knowledge and tools. It is recommended to seek assistance from a qualified mechanic or dealership for proper repair.

5. How critical is it to address OBDII code B0102 in a Chevrolet promptly?

It is crucial to address OBDII code B0102 promptly as it indicates a potential issue with the airbag system, which is a critical safety component in the vehicle. Ignoring or delaying the repair can compromise the airbag's functionality in the event of an accident.

6. Are there any safety concerns associated with OBDII code B0102 in a Chevrolet?

Yes, OBDII code B0102 indicates a problem with the driver-side airbag system, which can affect the airbag's deployment in a collision. It is essential to address this issue promptly to ensure the airbag functions properly in an emergency.

7. Will resetting the OBDII code B0102 in my Chevrolet resolve the issue?

Simply resetting the code may temporarily turn off the warning light, but it will not fix the underlying problem causing OBDII code B0102. It is essential to diagnose and repair the issue to ensure the airbag system functions correctly.

8. How much does it typically cost to repair OBDII code B0102 in a Chevrolet?

The cost of repairing OBDII code B0102 can vary depending on the cause of the issue, the parts needed for repair, and labor costs. It is advisable to obtain estimates from reputable mechanics or dealerships for an accurate cost assessment.

9. Can driving with OBDII code B0102 in a Chevrolet be dangerous?

Driving with OBDII code B0102 can be dangerous as it indicates a potential fault with the airbag system, compromising its effectiveness in a crash. It is recommended to address the issue promptly to ensure the safety of occupants in the vehicle.

10. Is OBDII code B0102 specific to Chevrolet vehicles only?

While OBDII code B0102 is associated with Chevrolet vehicles and relates to the Driver-Side EFS Incorrect Identification Message, similar codes may exist for other vehicle manufacturers with their own diagnostic trouble codes related to airbag systems.