B0103 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 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.
Code B0103 Description
What are the Possible Causes of the DTC B0103?
- 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?
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 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
- B0103 Buick — Passenger-Side EFS Valid Identification Not Received
- B0103 Cadillac — Passenger-Side EFS Valid Identification Not Received
- B0103 Chevrolet — Passenger-Side EFS Valid Identification Not Received
- B0103 GMC — Passenger-Side EFS Valid Identification Not Received
- B0103 Lexus — Short To Battery In D Squib Circuit
- B0103 Pontiac — Passenger-Side EFS Valid Identification Not Received
- B0103 Saturn — Passenger-Side EFS Valid Identification Not Received
- B0103 Scion — Short To Battery In D Squib Circuit
- B0103 Toyota — Short To Battery In D 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 B0103 Code
1. What does the OBDII code B0103 mean?
The B0103 code indicates that the Passenger-Side Electronic Front Sensor (EFS) failed to transmit valid identification data to the airbag control module.
2. What are the common symptoms of the B0103 code?
Symptoms may include an illuminated airbag warning light, the airbag system being disabled, or a stored fault code in the vehicle's computer.
3. What causes the B0103 code to appear?
Common causes include a faulty passenger-side EFS, damaged wiring or connectors, issues with the airbag control module, or communication errors.
4. Is it safe to drive with the B0103 code?
Driving with this code is not recommended, as it may indicate that the passenger-side airbag system is disabled and won’t deploy in the event of an accident.
5. How can I diagnose the B0103 code?
Start by using an OBDII scanner to confirm the code, then inspect the wiring and connectors for damage, and test the functionality of the passenger-side EFS.
6. Can I fix the B0103 code myself?
If the issue is a loose or damaged connector, you may be able to fix it yourself. However, diagnosing and replacing a faulty EFS or airbag control module typically requires professional tools and expertise.
7. How much does it cost to repair the B0103 code?
Repair costs can vary, but replacing a passenger-side EFS may cost $200–$400, while wiring repairs or module replacements could add to the total.
8. What tools are needed to troubleshoot the B0103 code?
You’ll need an OBDII scanner capable of reading airbag system codes, a multimeter for electrical testing, and potentially a wiring diagram for your vehicle.
9. Can a weak battery cause the B0103 code?
Yes, a weak or failing battery can sometimes cause communication errors between sensors and modules, leading to the B0103 code.
10. Does the B0103 code reset itself after repairs?
In most cases, the code will need to be manually cleared using an OBDII scanner after the issue is resolved.
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