B0105 Code - Passenger-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 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
- B0105 indicates Passenger-Side EFS Incorrect Identification Message.
- 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.
Code B0105 Description
What are the Possible Causes of the DTC B0105?
- 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 B0105?
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 B0105 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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Information for Specific Makes
- B0105 Buick — Passenger-Side EFS Incorrect Identification Message
- B0105 Cadillac — Passenger-Side EFS Incorrect Identification Message
- B0105 Chevrolet — Passenger-Side EFS Incorrect Identification Message
- B0105 GMC — Passenger-Side EFS Incorrect Identification Message
- B0105 Lexus — Short In P Squib Circuit
- B0105 Pontiac — Passenger-Side EFS Incorrect Identification Message
- B0105 Saturn — Passenger-Side EFS Incorrect Identification Message
- B0105 Scion — Short In P Squib Circuit
- B0105 Toyota — Short In P 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.
Frequently Asked Questions about B0105 Code
1. What does the OBDII code B0105 mean?
B0105 indicates that the passenger-side Electronic Front Sensor (EFS) is sending an incorrect identification message to the airbag control module.
2. What are the common symptoms of code B0105?
Symptoms can include the airbag warning light illuminating on the dashboard and possible deactivation of the passenger-side airbag system.
3. What causes the B0105 code to trigger?
The code can be caused by a faulty passenger-side EFS, damaged wiring or connectors, corrosion in the electrical connections, or a malfunctioning airbag control module.
4. Is it safe to drive with the B0105 code active?
It is not recommended because the passenger-side airbag system may not deploy correctly in an accident, potentially compromising passenger safety.
5. How is the B0105 code diagnosed?
A technician will use a scan tool to verify the code, inspect the EFS and its wiring for damage or corrosion, and test the airbag control module for proper function.
6. Can the B0105 code be fixed by resetting the system?
Resetting the system might clear the code temporarily, but the underlying issue needs to be repaired to prevent the code from returning.
7. How much does it typically cost to repair a B0105 code?
Repair costs can vary widely, ranging from $100 to $600 or more, depending on whether the issue is a simple wiring repair or a replacement sensor/module.
8. Can I fix the B0105 code myself?
If you have experience with automotive electronics, you can inspect and repair wiring or connectors. However, replacing sensors or working on the airbag system is best left to professionals.
9. What tools are needed to diagnose the B0105 code?
Tools may include an OBDII scanner, a multimeter to check wiring continuity, and possibly special tools for working on the airbag system.
10. Will a faulty EFS always trigger the B0105 code?
Not always; a faulty EFS may trigger other airbag-related codes depending on the vehicle's make and model. A thorough diagnosis is necessary.
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