AutoCodes – Cadillac – B0102 Cadillac

B0102 Cadillac 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 Cadillac 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 1,053

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

What does this mean?

What are the Possible Causes of the DTC B0102 Cadillac?

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 Cadillac?

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 Cadillac 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.

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

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Get the B0102 Cadillac 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 Cadillac Code

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

- Common symptoms include the airbag warning light illuminating on the dashboard and a message indicating "Driver-Side EFS Incorrect Identification" displayed in the vehicle's information center.

2. What does OBDII code B0102 in a Cadillac indicate?

- This code indicates a malfunction in the Driver-Side Electronic Front Sensor (EFS) module, leading to an incorrect identification message being triggered.

3. What are the possible causes of the Driver-Side EFS Incorrect Identification Message in a Cadillac?

- Possible causes include a faulty EFS module, damaged wiring or connectors in the airbag system, or a communication error between the EFS module and the vehicle's computer.

4. How can I diagnose the issue causing the OBDII code B0102 in my Cadillac?

- Diagnosis typically involves using a professional OBDII scanner to retrieve the specific fault codes, checking the wiring and connectors for damage, and testing the EFS module for proper functionality.

5. Can I continue driving my Cadillac with the Driver-Side EFS Incorrect Identification Message displayed?

- It is not recommended to drive with the airbag warning light on, as the airbag system may not function correctly in the event of a collision. Prompt diagnosis and repair are advised.

6. Is it possible to reset the OBDII code B0102 in a Cadillac without fixing the underlying issue?

- While you can clear the fault code temporarily, the issue causing the code will persist until repaired. Resetting the code without addressing the problem may lead to unsafe driving conditions.

7. How can I repair the Driver-Side EFS Incorrect Identification Message in my Cadillac?

- Repair options include replacing the faulty EFS module, repairing damaged wiring or connectors, and ensuring proper communication between the module and the vehicle's computer.

8. Are there any DIY tips for troubleshooting OBDII code B0102 in a Cadillac?

- DIY tips include visually inspecting the airbag system's wiring and connectors for any visible damage, ensuring all connections are secure, and checking for blown fuses related to the airbag system.

9. Can a Cadillac dealership or auto repair shop help with diagnosing and repairing the OBDII code B0102 issue?

- Yes, professional technicians at a Cadillac dealership or reputable auto repair shop have the expertise and tools to accurately diagnose and repair the Driver-Side EFS Incorrect Identification Message in your vehicle.

10. How critical is it to address the OBDII code B0102 related to the Driver-Side EFS Incorrect Identification Message in a Cadillac?

- It is crucial to address this issue promptly, as the correct functioning of the airbag system is essential for occupant safety in the event of a collision. Ignoring the problem may compromise the effectiveness of the airbags.