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Engine-Codes – GMC – B0078 GMC

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

Quick Answer

The B0078 diagnostic trouble code (DTC) for GMC vehicles specifically refers to the Right Front/Passenger Side Impact Sensor Performance. Common causes include Impact sensor damaged due to a collision, Corrosion or damage to sensor wiring, Loose or faulty sensor 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 GMC indicates Right Front/Passenger Side Impact Sensor Performance.
Common causes
Common causes include Impact sensor damaged due to a collision, Corrosion or damage to sensor wiring, Loose or faulty sensor 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.
What is this?
Table of contents Created and updated by William Orellana on Sep 13, 2024
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Code B0078 GMC Description

The B0078 diagnostic trouble code (DTC) for GMC vehicles specifically refers to the Right Front/Passenger Side Impact Sensor Performance. This code indicates that there is a malfunction or performance issue with the impact sensor located on the right front or passenger side of the vehicle. Impact sensors are crucial components of a vehicle's safety system, as they are responsible for detecting collisions or impacts and triggering the deployment of airbags to protect occupants.

OBDII Code B0078 GMC - Right Front/Passenger Side Impact Sensor Performance
B0078 GMC Code - Right Front/Passenger Side Impact Sensor Performance

Common Causes of B0078 GMC

  1. Impact sensor damaged due to a collision
  2. Corrosion or damage to sensor wiring
  3. Loose or faulty sensor connection
  4. Faulty impact sensor module
  5. Issues with the airbag control module

Symptoms of B0078 GMC

  1. Airbag warning light illuminated on the dashboard
  2. Airbag system fault message displayed on the instrument cluster
  3. Airbags not deploying in a collision
  4. Inconsistent or erratic airbag deployment

How to Fix B0078 GMC

  1. Begin by diagnosing the specific cause of the performance issue with the impact sensor using a diagnostic scan tool.
  2. Inspect the impact sensor and its wiring for any damage, corrosion, or loose connections. Repair or replace any damaged components.
  3. Clear the DTC from the vehicle's system using the diagnostic scan tool.
  4. Test the airbag system to ensure the impact sensor is now functioning correctly and triggering airbag deployment as intended.
  5. If necessary, replace the impact sensor or any other faulty components to resolve the issue.

Cost to Fix B0078 GMC

The cost of repairing a Right Front/Passenger Side Impact Sensor Performance issue can vary depending on the specific cause of the problem and the extent of the repairs needed. In general, the cost of replacing an impact sensor can range from $100 to $300, while labor costs can add an additional $100 to $200. Overall, the total repair cost for this issue could range from $200 to $500. It's important to note that these are rough estimates, and actual costs may vary based on factors such as location, vehicle make and model, and labor rates at auto repair shops. It's recommended to obtain a detailed quote from a trusted mechanic or dealership for a more accurate cost estimate.

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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 GMC Code

1. What are the common symptoms of OBDII code B0078 GMC (Right Front/Passenger Side Impact Sensor Performance)?

- Common symptoms include the airbag warning light illuminating on the dashboard and potential issues with the airbag system's functionality.

2. What can cause the OBDII code B0078 GMC to trigger?

- The code B0078 GMC is typically triggered by a fault in the right front/passenger side impact sensor, such as wiring issues, sensor malfunctions, or physical damage.

3. How can I diagnose the cause of OBDII code B0078 GMC?

- Diagnosing the code involves checking the wiring harness and connections of the right front/passenger side impact sensor, inspecting the sensor for physical damage, and using a diagnostic scanner to read the error codes.

4. What are the repair options for OBDII code B0078 GMC?

- Repair options may include repairing or replacing damaged wiring, replacing the right front/passenger side impact sensor, or addressing any underlying issues that caused the code to trigger.

5. Can I drive my vehicle with OBDII code B0078 GMC active?

- It is not recommended to drive the vehicle with an active B0078 GMC code, as it indicates a potential issue with the airbag system, which could compromise safety in the event of a collision.

6. How much does it cost to repair OBDII code B0078 GMC?

- The cost of repairing OBDII code B0078 GMC can vary depending on the specific cause of the issue, the labor rates of the repair shop, and the cost of any replacement parts needed.

7. Are there any safety concerns associated with OBDII code B0078 GMC?

- Yes, OBDII code B0078 GMC indicates a problem with the right front/passenger side impact sensor, which could affect the proper deployment of the airbag in the event of a collision, posing a safety risk.

8. Can I reset OBDII code B0078 GMC without fixing the underlying issue?

- While you can clear the code temporarily, it is important to address the underlying issue causing the B0078 GMC code to prevent safety risks and ensure the proper functioning of the airbag system.

9. Is OBDII code B0078 GMC a common issue in GMC vehicles?

- OBDII code B0078 GMC related to the right front/passenger side impact sensor performance is a relatively common issue in GMC vehicles equipped with airbag systems.

10. How often should I have the airbag system checked to prevent OBDII code B0078 GMC from occurring?

- It is recommended to have the airbag system inspected during routine maintenance checks or if you notice any signs of issues to help prevent OBDII code B0078 GMC from occurring.

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