AutoCodes – Saturn – B0102 Saturn

B0102 Saturn 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 Saturn 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 1,119

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

What does this mean?

What are the Possible Causes of the DTC B0102 Saturn?

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 Saturn?

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 Saturn 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 Saturn code?

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

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Get the B0102 Saturn 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 Saturn Code

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

- Common symptoms include the illumination of the airbag warning light on the dashboard, a message indicating "Driver-Side EFS Incorrect Identification," and potential issues with the airbag system.

2. What could be causing the OBDII code B0102 related to the Driver-Side EFS Incorrect Identification Message in a Saturn?

- The code B0102 in a Saturn is often caused by a faulty electronic front sensor (EFS), a malfunctioning airbag control module, wiring issues, or a poor connection in the system.

3. How can I diagnose the OBDII code B0102 in my Saturn indicating a Driver-Side EFS Incorrect Identification Message?

- Diagnosis typically involves using an OBDII scanner to retrieve the specific fault code, inspecting the wiring and connections associated with the driver-side airbag system, and testing the electronic front sensor for proper functionality.

4. Are there any safety concerns associated with the OBDII code B0102 related to the Driver-Side EFS Incorrect Identification Message in a Saturn?

- Yes, addressing this code promptly is crucial, as it indicates a potential issue with the driver-side airbag system, which could compromise the effectiveness of the airbag in the event of a collision.

5. What are some possible repair tips for resolving the OBDII code B0102 in a Saturn indicating a Driver-Side EFS Incorrect Identification Message?

- Repair options may include replacing the faulty electronic front sensor, repairing damaged wiring or connections, resetting the airbag control module, or seeking professional assistance to diagnose and fix the issue.

6. Can I continue driving my Saturn if the OBDII code B0102 with the Driver-Side EFS Incorrect Identification Message is present?

- It is not recommended to drive the vehicle with this code active, as it indicates a potential problem with the driver-side airbag system, which is a critical safety component in the event of a collision.

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

- The cost of repair can vary depending on the specific cause of the code, but it may involve parts replacement, labor costs, and diagnostic fees, which could range from a few hundred to over a thousand dollars.

8. Can I reset the OBDII code B0102 in my Saturn indicating a Driver-Side EFS Incorrect Identification Message on my own?

- While you can try clearing the code with an OBDII scanner, it is crucial to address the underlying issue causing the code to prevent it from reoccurring and potentially compromising the airbag system's safety.

9. How long does it typically take to repair the OBDII code B0102 related to the Driver-Side EFS Incorrect Identification Message in a Saturn?

- The repair time can vary based on the specific cause of the code, the availability of parts, and the complexity of the repair process, but it may take a few hours to a full day to diagnose and fix the issue.

10. Is the OBDII code B0102 indicating a Driver-Side EFS Incorrect Identification Message a common problem in Saturn vehicles?

- While not extremely common, the B0102 code related to the Driver-Side EFS Incorrect Identification Message can occur in Saturn vehicles due to various factors affecting the airbag system's components.