AutoCodes – Buick – B0078 Buick

B0078 Buick Code - Right Front/Passenger Side Impact Sensor Performance

Quick Answer

The Inflatable Restraint Side Impact Sensor (SIS) utilizes a unidirectional 2-wire circuit. Common causes include Faulty Right Front/Passenger Side Impact Sensor (SIS), Right Front/Passenger Side Impact Sensor (SIS) harness is open or shorted, Right Front/Passenger Side Impact Sensor (SIS) 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: B0078 Buick indicates Right Front/Passenger Side Impact Sensor Performance.
Common causes: Common causes include Faulty Right Front/Passenger Side Impact Sensor (SIS), Right Front/Passenger Side Impact Sensor (SIS) harness is open or shorted, Right Front/Passenger Side Impact Sensor (SIS) 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 1,979

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 Jun 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B0078 Buick Description

The Inflatable Restraint Side Impact Sensor (SIS) utilizes a unidirectional 2-wire circuit. The SIS modulates current on the interface to send ID, State of Health, and deployment commands to the Inflatable Restraint Sensing and Diagnostic Module (SDM). The SDM serves as a power source and a ground for the SIS. When the ignition is turned on and input power from the SDM is first detected, the SIS responds by performing internal diagnostics and sending an ID to the SDM. The SDM considers the ID to be valid if the response time is less than 5 seconds. The SIS continually communicates status messages to the SDM, which determines if a fault is present in the SIS circuit. When a fault is detected, the SDM resets the SIS twice by removing and reapplying power. If the fault is still present, the SDM will set a Diagnostic Trouble Code (DTC).

OBDII Code B0078 Buick - Right Front/Passenger Side Impact Sensor Performance - AutoCodes.com — B0078 Buick Code - Right Front/Passenger Side Impact Sensor Performance

What does this mean?

What are the Possible Causes of the DTC B0078 Buick?

Faulty Right Front/Passenger Side Impact Sensor (SIS)
Right Front/Passenger Side Impact Sensor (SIS) harness is open or shorted
Right Front/Passenger Side Impact Sensor (SIS) circuit poor electrical connection
Faulty Inflatable Restraint Sensing and Diagnostic Module (SDM)

How to Fix the DTC B0078 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 B0078 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 B0078 Buick code?

Need more information on how to fix the B0078 Buick code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B0078 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 B0078 Buick Code

1. What are the common symptoms of OBDII code B0078 in a Buick related to the right front/passenger side impact sensor performance?

- Common symptoms include the airbag warning light being illuminated on the dashboard and potential issues with the airbag system's deployment.

2. What could be causing the OBDII code B0078 in a Buick indicating right front/passenger side impact sensor performance issues?

- Causes could include a faulty impact sensor, wiring issues, a loose connection, or sensor placement problems due to an impact or collision.

3. How can I diagnose the OBDII code B0078 in my Buick to confirm it is related to the right front/passenger side impact sensor?

- A diagnostic scan tool can be used to retrieve the specific trouble code, and further testing of the impact sensor and its components may be required.

4. Is it safe to drive my Buick with the OBDII code B0078 indicating right front/passenger side impact sensor performance problems?

- It is not recommended to drive the vehicle with an illuminated airbag warning light, as the airbag system may not function properly in the event of a collision.

5. Can I reset the OBDII code B0078 in my Buick related to the right front/passenger side impact sensor performance myself?

- While you can clear the trouble code with a diagnostic tool, it is crucial to address the underlying issue causing the code to prevent safety risks.

6. What are some repair tips for fixing the OBDII code B0078 in a Buick associated with the right front/passenger side impact sensor?

- Repair tips may include inspecting and repairing any damaged wiring, securing loose connections, or replacing the impact sensor if necessary.

7. How much does it typically cost to repair the OBDII code B0078 in a Buick concerning right front/passenger side impact sensor performance?

- Repair costs can vary depending on the exact cause of the issue, but expenses may include parts and labor for sensor replacement or wiring repairs.

8. Are there any recalls or technical service bulletins related to the OBDII code B0078 in Buick vehicles for right front/passenger side impact sensor performance?

- It is advisable to check with Buick or a certified dealership for any related recalls or technical service bulletins that may apply to your specific model and year.

9. Can a DIY enthusiast with automotive experience fix the OBDII code B0078 in a Buick involving the right front/passenger side impact sensor?

- Depending on the skill level and tools available, some DIY enthusiasts may be able to address the issue, but caution and proper diagnosis are essential for safety reasons.

10. How important is it to promptly address the OBDII code B0078 in a Buick indicating right front/passenger side impact sensor performance concerns?

- It is crucial to address the issue promptly to ensure the proper functioning of the airbag system in the event of an accident and maintain the vehicle's safety standards.