AutoCodes – Pontiac – B0101 Pontiac

B0101 Pontiac Code - Driver-Side EFS Not Okay 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: B0101 Pontiac indicates Driver-Side EFS Not Okay 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 1,661

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 B0101 Pontiac 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 B0101 Pontiac - Driver-Side EFS Not Okay Message - AutoCodes.com — B0101 Pontiac Code - Driver-Side EFS Not Okay Message

What does this mean?

What are the Possible Causes of the DTC B0101 Pontiac?

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 B0101 Pontiac?

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 B0101 Pontiac 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 B0101 Pontiac code?

Need more information on how to fix the B0101 Pontiac code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B0101 Pontiac 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 B0101 Pontiac Code

1. What are the common symptoms of OBDII code B0101 (Driver-Side EFS Not Okay Message) in a Pontiac?

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

2. What typically causes the OBDII code B0101 to trigger in a Pontiac?

The code is usually triggered by a fault in the driver-side airbag sensor circuit, such as a damaged sensor or a wiring issue.

3. How serious is the OBDII code B0101 in a Pontiac?

The code indicates a potential safety issue as it affects the proper functioning of the driver-side airbag, which is a crucial safety component in the event of a collision.

4. Can I continue driving my Pontiac with the OBDII code B0101 present?

It is not recommended to drive the vehicle with the code active, as it may result in the driver-side airbag not deploying in an accident, compromising safety.

5. How can I diagnose and repair the OBDII code B0101 in my Pontiac?

Diagnosis typically involves inspecting the driver-side airbag sensor and related wiring for damage or loose connections. Repair may involve replacing the faulty sensor or repairing the wiring issue.

6. Will resetting the OBDII code B0101 in my Pontiac make the problem go away?

Resetting the code may temporarily clear the airbag warning light, but it will not fix the underlying issue causing the code to trigger. The problem should be properly diagnosed and repaired.

7. Can a DIY enthusiast fix the OBDII code B0101 in a Pontiac?

While some DIY enthusiasts may have the skills to diagnose and repair the issue, working on airbag systems can be complex and potentially dangerous. It is recommended to seek professional help for this type of repair.

8. How much does it typically cost to repair the OBDII code B0101 in a Pontiac?

The cost of repair can vary depending on the specific cause of the issue, the labor rates in your area, and whether genuine Pontiac parts are used. It's advisable to get a few quotes from reputable mechanics.

9. Are there any recalls or service bulletins related to the OBDII code B0101 in Pontiac vehicles?

It's recommended to check with your local Pontiac dealership or visit the National Highway Traffic Safety Administration (NHTSA) website to see if there are any recalls or service bulletins related to this code for your specific model.

10. How can I prevent the OBDII code B0101 from occurring in my Pontiac?

Regularly maintaining and inspecting your vehicle's airbag system, including sensors and wiring, can help prevent issues that may trigger the code. Addressing any warning lights or unusual symptoms promptly is also key to preventing safety concerns.