AutoCodes – Buick – B1148 Buick

B1148 Buick Code - Passenger Side Air Bag System Malfunction

Quick Answer

When the ignition switch is turned to RUN position, Side Impact Sensing Module (SISM) will perform tests to diagnose critical internal malfunctions. Common causes include Faulty Passenger Side Air Bag, Passenger Side Air Bag harness is open or shorted, Passenger Side Air Bag 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: B1148 Buick indicates Passenger Side Air Bag System Malfunction.
Common causes: Common causes include Faulty Passenger Side Air Bag, Passenger Side Air Bag harness is open or shorted, Passenger Side Air Bag 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 441

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Aug 03, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1148 Buick Description

When the ignition switch is turned to RUN position, Side Impact Sensing Module (SISM) will perform tests to diagnose critical internal malfunctions. The SISM then tests the deployment loop for an open, short to ground or ignition, high or low resistance, or reserve energy failure condition. SISM transmits a 300-millisecond, 50 percent duty cycle, pulse width modulated signal to Sensing and Diagnostic Module (SDM) over-circuit 2108 to indicate normal operation and no malfunctions. SISM communicates that it is turning off (ignition OFF) by sending a 20 millisecond, 50 percent duty cycle, pulse width modulated signal. The Diagnostic Trouble Code (DTC) sets when SDM receives a pulse width signal other than specified for normal operation, or no signal. SISM performs tests during POWER-ON, CONTINUOUS MONITORING, and asynchronously.

OBDII Code B1148 Buick - Passenger Side Air Bag System Malfunction - AutoCodes.com — B1148 Buick Code - Passenger Side Air Bag System Malfunction

What does this mean?

What are the Possible Causes of the DTC B1148 Buick?

Faulty Passenger Side Air Bag
Passenger Side Air Bag harness is open or shorted
Passenger Side Air Bag circuit poor electrical connection
Faulty Side Impact Sensing Module (SISM)
Faulty Sensing and Diagnostic Module (SDM)

How to Fix the DTC B1148 Buick?

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 B1148 Buick 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 B1148 Buick code?

Need more information on how to fix the B1148 Buick code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1148 Buick 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 B1148 Buick Code

1. What are common symptoms of OBDII code B1148 in a Buick related to the passenger side air bag system malfunction?

- Common symptoms include the airbag warning light staying illuminated on the dashboard and a potential message indicating an issue with the passenger side airbag system.

2. What are possible causes of OBDII code B1148 in a Buick indicating a passenger side air bag system malfunction?

- Possible causes may include a faulty passenger side airbag module, damaged wiring or connectors, or a malfunctioning airbag sensor.

3. How serious is OBDII code B1148 in a Buick related to the passenger side air bag system malfunction?

- This code indicates a potential safety issue as the passenger side airbag system may not deploy correctly in the event of a collision, so it should be addressed promptly.

4. Can I continue to drive my Buick with OBDII code B1148 showing a passenger side air bag system malfunction?

- It is not recommended to drive the vehicle with this code present, as the passenger side airbag may not function properly in case of an accident.

5. How can I diagnose and repair OBDII code B1148 in my Buick indicating a passenger side air bag system malfunction?

- Diagnosis typically involves scanning the vehicle's computer for the specific fault code and then inspecting the passenger side airbag system components for issues. Repair may involve replacing a faulty airbag module, repairing damaged wiring, or addressing sensor problems.

6. Are there any safety precautions to take when working on the passenger side air bag system in a Buick to resolve code B1148?

- Safety precautions should always be followed, such as disconnecting the vehicle's battery before working on the airbag system to prevent accidental deployment.

7. Is it possible to reset OBDII code B1148 in a Buick related to the passenger side air bag system malfunction without fixing the underlying issue?

- While you can clear the code temporarily with a scan tool, it will likely reappear until the root cause of the passenger side air bag system malfunction is addressed.

8. Are there any recalls or technical service bulletins related to OBDII code B1148 in Buick vehicles for passenger side air bag system malfunctions?

- It's recommended to check with Buick or a certified dealership to inquire about any recalls or technical service bulletins related to this specific OBDII code and issue in your vehicle.

9. Can a DIY enthusiast with some automotive experience repair OBDII code B1148 indicating a passenger side air bag system malfunction in a Buick?

- While some may feel comfortable diagnosing and repairing this issue themselves, it is recommended to consult a professional technician due to the critical safety nature of the airbag system.

10. How much can I expect to pay for repairs related to OBDII code B1148 in a Buick for a passenger side air bag system malfunction?

- The cost of repairs can vary depending on the specific issue causing the code, but it's advisable to budget for potential part replacements and labor costs associated with repairing the passenger side airbag system.