AutoCodes – Cadillac – B0103 Cadillac

B0103 Cadillac 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 Cadillac 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 2,241

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

What does this mean?

What are the Possible Causes of the DTC B0103 Cadillac?

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 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 B0103 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.

Need more information about the B0103 Cadillac code?

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

Need Help with the Code?

Get the B0103 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 B0103 Cadillac Code

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

- Common symptoms include the airbag warning light staying illuminated on the dashboard and potential issues with the passenger-side airbag system.

2. What are some possible causes of OBDII code B0103 on a Cadillac?

- Possible causes include a faulty electronic front sensor (EFS), loose connections, damaged wiring, or a malfunctioning passenger-side airbag module.

3. How can I diagnose the issue causing OBDII code B0103 on my Cadillac?

- To diagnose the issue, you may need to use an OBDII scanner to retrieve the specific fault codes. Additionally, inspect the wiring and connections related to the passenger-side airbag system for any issues.

4. Is it safe to drive my Cadillac with OBDII code B0103 triggered?

- It is not recommended to drive the vehicle with this code triggered, as it indicates a potential issue with the passenger-side airbag system, which is a crucial safety component.

5. Can I reset OBDII code B0103 on my Cadillac without addressing the underlying issue?

- While you can clear the code temporarily, it is important to address the underlying problem causing the code to prevent potential safety risks in case of an accident.

6. How can I repair OBDII code B0103 on my Cadillac related to Passenger-Side EFS Valid Identification Not Received?

- Repair may involve replacing the faulty electronic front sensor (EFS), repairing damaged wiring, securing loose connections, or replacing the passenger-side airbag module if necessary.

7. Are there any DIY tips for fixing OBDII code B0103 on a Cadillac?

- DIY tips include checking the connections and wiring related to the passenger-side airbag system, ensuring they are secure and free of damage. However, for complex repairs, it's best to consult a professional.

8. What is the role of the Passenger-Side EFS in the Cadillac airbag system?

- The Passenger-Side EFS (Electronic Front Sensor) is responsible for detecting the presence of a passenger and ensuring the proper deployment of the airbag in case of a collision.

9. Can weather conditions or environmental factors trigger OBDII code B0103 on a Cadillac?

- While rare, extreme weather conditions or exposure to moisture can potentially cause issues with the passenger-side airbag system, leading to the triggering of OBDII code B0103.

10. How much does it typically cost to repair OBDII code B0103 on a Cadillac at a dealership or repair shop?

- The cost of repairing OBDII code B0103 can vary depending on the specific issue and labor rates. Typically, the repair cost can range from $200 to $500, including parts and labor.