AutoCodes – Chevrolet – B0103 Chevrolet

B0103 Chevrolet Code - Passenger-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 Passenger-Side Electronic Frontal Sensor (EFS), Passenger-Side Electronic Frontal Sensor (EFS) harness is open or shorted, Passenger-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: B0103 Chevrolet indicates Passenger-Side EFS Valid Identification Not Received.
Common causes: Common causes include Faulty Passenger-Side Electronic Frontal Sensor (EFS), Passenger-Side Electronic Frontal Sensor (EFS) harness is open or shorted, Passenger-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 11,672

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 B0103 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 B0103 Chevrolet - Passenger-Side EFS Valid Identification Not Received - AutoCodes.com — B0103 Chevrolet Code - Passenger-Side EFS Valid Identification Not Received

What does this mean?

What are the Possible Causes of the DTC B0103 Chevrolet?

Faulty Passenger-Side Electronic Frontal Sensor (EFS)
Passenger-Side Electronic Frontal Sensor (EFS) harness is open or shorted
Passenger-Side Electronic Frontal Sensor (EFS) circuit poor electrical connection
Faulty Sensing and Diagnostic Module (SDM)

How to Fix the DTC B0103 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 B0103 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 B0103 Chevrolet code?

Need more information on how to fix the B0103 Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B0103 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 B0103 Chevrolet Code

1. What are the common symptoms of OBDII code B0103 in a Chevrolet related to the Passenger-Side EFS Valid Identification Not Received?

- The common symptoms include the airbag warning light illuminating on the dashboard and potential non-deployment of the passenger-side airbag in the event of a crash.

2. What are the possible causes of OBDII code B0103 in a Chevrolet?

- The code B0103 typically indicates a communication issue between the airbag control module and the passenger-side airbag Electronic Front Sensor (EFS). This can be caused by damaged wiring, a faulty EFS, or a malfunctioning airbag control module.

3. How can I diagnose the OBDII code B0103 in a Chevrolet?

- To diagnose the code B0103, you can use a diagnostic scan tool to retrieve the specific fault code. Additionally, inspecting the wiring and connections related to the passenger-side airbag system can help identify any visible issues.

4. Can I continue to drive my Chevrolet with OBDII code B0103 present?

- It is not recommended to drive the vehicle with the OBDII code B0103 present, as it indicates a potential issue with the passenger-side airbag system. In the event of a crash, the airbag may not deploy as intended, compromising passenger safety.

5. How can I repair OBDII code B0103 in a Chevrolet?

- Repairing the OBDII code B0103 involves resolving the communication issue between the airbag control module and the passenger-side EFS. This may require repairing or replacing damaged wiring, replacing the faulty EFS, or addressing any issues with the airbag control module.

6. Is it safe to reset the OBDII code B0103 in a Chevrolet without fixing the underlying issue?

- Resetting the code without addressing the underlying issue is not recommended, as it may temporarily turn off the warning light but does not fix the problem with the passenger-side airbag system. It is essential to diagnose and repair the root cause of the code.

7. Can a DIY enthusiast fix OBDII code B0103 in a Chevrolet?

- While some aspects of diagnosing and repairing OBDII code B0103 may be within reach of a DIY enthusiast, dealing with airbag systems can be complex and dangerous. It is recommended to seek professional help to ensure the proper diagnosis and repair of the issue.

8. How much does it cost to fix OBDII code B0103 in a Chevrolet?

- The cost of fixing OBDII code B0103 in a Chevrolet can vary depending on the underlying cause of the issue. Costs may include parts such as the EFS, labor for diagnosis and repair, as well as any additional components that need replacement.

9. What other OBDII codes may be related to the Passenger-Side EFS Valid Identification Not Received issue in a Chevrolet?

- Other related OBDII codes that may be displayed alongside B0103 include B0100 (Airbag control module), B0101 (Passenger-side EFS circuit malfunction), and B0102 (Passenger-side EFS circuit low voltage).

10. Can a disconnected or faulty battery cause OBDII code B0103 in a Chevrolet?

- Yes, a disconnected or faulty battery can sometimes trigger the OBDII code B0103 in a Chevrolet, as it may disrupt the communication between the airbag control module and the passenger-side EFS. Reconnecting or replacing the battery may resolve the issue in such cases.