AutoCodes – Chevrolet – B0100 Chevrolet

B0100 Chevrolet Code - Driver-Side EFS Valid Identification Not Received

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: B0100 Chevrolet indicates Driver-Side EFS Valid Identification Not Received.
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 12,419

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 B0100 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 B0100 Chevrolet - Driver-Side EFS Valid Identification Not Received - AutoCodes.com — B0100 Chevrolet Code - Driver-Side EFS Valid Identification Not Received

What does this mean?

What are the Possible Causes of the DTC B0100 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 B0100 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 B0100 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 B0100 Chevrolet code?

Need more information on how to fix the B0100 Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B0100 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 B0100 Chevrolet Code

1. What are the common symptoms of OBDII code B0100 in a Chevrolet related to the Driver-Side EFS Valid Identification Not Received?

- Common symptoms include the airbag warning light illuminating on the dashboard and potential issues with the driver-side airbag system.

2. What are the possible causes of OBDII code B0100 in a Chevrolet indicating Driver-Side EFS Valid Identification Not Received?

- Possible causes can include a malfunctioning electronic front sensor (EFS), wiring issues, or a faulty airbag control module.

3. How can I diagnose the OBDII code B0100 in a Chevrolet for Driver-Side EFS Valid Identification Not Received?

- Diagnosis involves using a scan tool to retrieve the specific trouble code, inspecting the wiring and connections related to the EFS, and testing the airbag system components.

4. Can I continue driving my Chevrolet with OBDII code B0100 related to the Driver-Side EFS issue?

- It is not recommended to continue driving with this code present, as it indicates a potential problem with the driver-side airbag system, which is crucial for safety in the event of a collision.

5. What are some repair tips for addressing OBDII code B0100 in a Chevrolet for Driver-Side EFS Valid Identification Not Received?

- Repair tips may include checking and repairing any damaged wiring, replacing the electronic front sensor (EFS) if necessary, or resetting the airbag control module after addressing the issue.

6. Is it possible to reset the OBDII code B0100 related to Driver-Side EFS Valid Identification Not Received in a Chevrolet without fixing the underlying problem?

- While you can clear the code temporarily, it is crucial to address the root cause to ensure the proper functioning of the driver-side airbag system.

7. How much does it typically cost to repair OBDII code B0100 in a Chevrolet due to the Driver-Side EFS Valid Identification Not Received?

- The cost of repair can vary depending on the specific issue, but it may involve expenses for parts replacement, labor, and diagnostic services.

8. Are there any safety concerns associated with OBDII code B0100 in a Chevrolet related to Driver-Side EFS Valid Identification Not Received?

- Yes, there are safety concerns as the code indicates a potential problem with the driver-side airbag system, which may affect its deployment in an accident.

9. Can I fix OBDII code B0100 related to Driver-Side EFS Valid Identification Not Received in a Chevrolet by myself, or should I seek professional help?

- While some DIY enthusiasts may be able to address simple wiring issues, it is recommended to seek professional help for diagnosing and repairing complex airbag system problems.

10. How long does it typically take to repair OBDII code B0100 in a Chevrolet caused by Driver-Side EFS Valid Identification Not Received?

- The repair time can vary depending on the exact cause of the issue, but it may take a few hours to a full day to diagnose and fix the problem properly.