B0102 Code - Driver-Side EFS Incorrect Identification Message

Quick Answer

The B0102 code indicates that there is an issue with the Driver-Side EFS (Electrically-Variable Suspension) Incorrect Identification Message in the vehicle. Common causes include Faulty EFS sensor, Wiring issues or loose connections, Malfunctioning EFS control module. 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 indicates Driver-Side EFS Incorrect Identification Message.

Common causes

Common causes include Faulty EFS sensor, Wiring issues or loose connections, Malfunctioning EFS control module.

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.

• Description
• Common Causes
• Symptoms
• How To Fix
• Cost to Fix
• FAQs
• Comments
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Common Causes of B0102

Symptoms of B0102

How to Fix B0102

Cost to Fix B0102

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Code B0102 Information for Specific Makes

• B0102 Buick — Driver-Side EFS Incorrect Identification Message
• B0102 Cadillac — Driver-Side EFS Incorrect Identification Message
• B0102 Chevrolet — Driver-Side EFS Incorrect Identification Message
• B0102 GMC — Driver-Side EFS Incorrect Identification Message
• B0102 Lexus — Short To Ground In D Squib Circuit
• B0102 Pontiac — Driver-Side EFS Incorrect Identification Message
• B0102 Saturn — Driver-Side EFS Incorrect Identification Message
• B0102 Scion — Short To Ground In D Squib Circuit
• B0102 Toyota — Short To Ground In D Squib Circuit

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 Code

1. What are the common symptoms of OBDII code B0102 (Driver-Side EFS Incorrect Identification Message)?

The common symptoms include the airbag warning light being illuminated on the dashboard and a potential loss of communication with the driver-side airbag system.

2. What can cause OBDII code B0102 to trigger?

This code may be triggered by a faulty electronic front sensor (EFS), a malfunction in the wiring harness connecting the EFS, or a problem with the airbag control module.

3. How serious is OBDII code B0102?

This code is serious as it indicates a potential issue with the driver-side airbag system, which could affect its proper deployment in the event of a collision. It is recommended to address this issue promptly.

4. Can I continue driving with OBDII code B0102 present?

It is not recommended to continue driving with this code present, as it could mean that the driver-side airbag system is compromised. It is best to have the issue diagnosed and repaired as soon as possible.

5. How can I diagnose OBDII code B0102?

Diagnosing this code typically involves using a diagnostic scanner to retrieve the trouble codes, followed by inspecting the EFS, wiring harness, and airbag control module for any signs of damage or malfunction.

6. What are some repair tips for fixing OBDII code B0102?

Repair tips include checking and repairing any damaged wiring, replacing the faulty EFS if necessary, and resetting the airbag control module to clear the code.

7. Can I reset OBDII code B0102 without fixing the underlying issue?

While you can clear the code temporarily by resetting the system, the underlying issue causing the code will persist. It is important to address the root cause of the problem to prevent the code from reoccurring.

8. How much does it cost to repair OBDII code B0102?

The cost of repairing this code can vary depending on the extent of the issue and the parts that need to be replaced. It is recommended to consult a professional mechanic for an accurate estimate.

9. Does OBDII code B0102 affect vehicle performance?

This code typically does not affect vehicle performance directly, but it can compromise the safety features of the driver-side airbag system. It is important to address the issue promptly to ensure proper functioning of the airbag in case of an accident.

10. Can I fix OBDII code B0102 myself?

While some DIY enthusiasts may be able to diagnose and repair this code themselves, it is recommended to seek professional help, especially when dealing with safety-critical systems like the airbag system.