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B0079 2018 GMC Sierra Code - Driver Seat Position Sensor Circuit

Quick Answer

The B0079 diagnostic trouble code (DTC) for the 2018 GMC Sierra relates to the driver seat position sensor circuit. Common causes include Faulty driver seat position sensor, Wiring or connection issues in the sensor circuit, Corrosion or damage to sensor components. 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
B0079 2018 GMC Sierra indicates Driver Seat Position Sensor Circuit.
Common causes
Common causes include Faulty driver seat position sensor, Wiring or connection issues in the sensor circuit, Corrosion or damage to sensor components.
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 16, 2024
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Code B0079 2018 GMC Sierra Description

The B0079 diagnostic trouble code (DTC) for the 2018 GMC Sierra relates to the driver seat position sensor circuit. This code indicates that there is a malfunction in the sensor that detects the position of the driver's seat. The seat position sensor is crucial for various safety systems in the vehicle, such as airbag deployment and seat belt tensioning. When this sensor fails or malfunctions, it can lead to inaccurate readings of the driver's position, potentially compromising the effectiveness of these safety features.

OBDII Code B0079 2018 GMC Sierra - Driver Seat Position Sensor Circuit
B0079 2018 GMC Sierra Code - Driver Seat Position Sensor Circuit

Common Causes of B0079 2018 GMC Sierra

  1. Faulty driver seat position sensor.
  2. Wiring or connection issues in the sensor circuit.
  3. Corrosion or damage to sensor components.
  4. Impact or physical damage to the driver's seat affecting sensor operation.

Symptoms of B0079 2018 GMC Sierra

  1. Airbag warning light illuminated on the dashboard.
  2. Inconsistent or delayed deployment of airbags in the event of a collision.
  3. Seat belt tensioning system not functioning properly.
  4. Erratic movement of the driver's seat.

How to Fix B0079 2018 GMC Sierra

  1. Begin by diagnosing the specific cause of the issue using a scan tool to read the DTC and pinpoint the faulty component.
  2. Inspect the wiring and connections in the driver seat position sensor circuit for any damage or corrosion. Repair or replace any damaged components.
  3. Test the driver seat position sensor itself to determine if it is functioning correctly. Replace the sensor if necessary.
  4. Clear the DTC from the vehicle's computer system using the scan tool.
  5. Test the system to ensure that the issue has been resolved and that the airbag warning light is no longer illuminated.

Cost to Fix B0079 2018 GMC Sierra

The cost of repairing a driver seat position sensor circuit issue can vary depending on the specific cause of the problem and the labor rates in your area. On average, you can expect to pay between $200 and $500 for parts and labor. Keep in mind that rates at auto repair shops can vary, so it's advisable to get a few quotes before proceeding with the repair. Additionally, the diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. It's recommended to check local rates for a more accurate estimate.

What does this mean?

Tech Notes for B0079 2018 GMC Sierra

B0079:01 Driver Seat Position Sensor Circuit Short to Battery

B0079:02 Driver Seat Position Sensor Circuit Short to Ground

B0079:04 Driver Seat Position Sensor Circuit Open

B0079:05 Driver Seat Position Sensor Circuit High Voltage or Open

B0079:06 Driver Seat Position Sensor Circuit Low Voltage or Open

B0079:08 Driver Seat Position Sensor Circuit Performance-Signal Invalid

B0079:0C Driver Seat Position Sensor Circuit Low Current

Need more information about the B0079 2018 GMC Sierra code?

Need more information on how to fix the B0079 2018 GMC Sierra code? Get Access to Factory Service Manuals

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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 B0079 2018 GMC Sierra Code

1. What are common symptoms of OBDII code B0079 in a 2018 GMC Sierra related to the driver seat position sensor circuit?

The common symptoms include the airbag warning light illuminating on the dashboard and possible issues with the airbag system's functionality.

2. What usually causes the OBDII code B0079 in a 2018 GMC Sierra related to the driver seat position sensor circuit?

The code is typically triggered by a malfunction in the driver seat position sensor circuit, which may be due to damaged wiring, a faulty sensor, or a poor connection.

3. How can I diagnose the driver seat position sensor circuit issue causing OBDII code B0079 in my 2018 GMC Sierra?

Diagnosing the problem involves inspecting the wiring and connections related to the driver seat position sensor, checking the sensor itself for proper functioning, and using a scan tool to retrieve specific diagnostic trouble codes.

4. Is it safe to drive my 2018 GMC Sierra with OBDII code B0079 related to the driver seat position sensor circuit?

It is not advised to drive the vehicle with this code present, as it indicates a potential issue with the airbag system, which could compromise safety in the event of a collision.

5. Can I reset the OBDII code B0079 in my 2018 GMC Sierra related to the driver seat position sensor circuit?

While you can clear the code with a scan tool, it is recommended to diagnose and repair the underlying issue to prevent the code from reappearing and ensure the proper functioning of the airbag system.

6. How much does it typically cost to repair the driver seat position sensor circuit issue causing OBDII code B0079 in a 2018 GMC Sierra?

The repair cost can vary depending on the exact cause of the issue, but it may involve replacing a faulty sensor, repairing damaged wiring, or addressing connection problems, which could range from a few hundred to over a thousand dollars.

7. Can I fix the driver seat position sensor circuit problem triggering OBDII code B0079 in my 2018 GMC Sierra myself?

If you have the necessary tools, knowledge, and experience working on automotive electrical systems, you may be able to address the issue yourself. However, it is recommended to consult a professional if you are unsure.

8. Will OBDII code B0079 in a 2018 GMC Sierra fail a vehicle inspection or emission test?

Since this code is related to the airbag system, it may not directly affect the vehicle's ability to pass an emission test. However, it is essential to address the underlying safety concern for inspection purposes.

9. How long does it take to repair the driver seat position sensor circuit issue causing OBDII code B0079 in a 2018 GMC Sierra?

The repair time can vary based on the specific problem and the technician's expertise, but it may take a few hours to half a day to diagnose and fix the issue.

10. Are there any recalls or technical service bulletins related to OBDII code B0079 in a 2018 GMC Sierra concerning the driver seat position sensor circuit?

It is advisable to check with a GMC dealership or visit the National Highway Traffic Safety Administration (NHTSA) website to see if there are any related recalls or service bulletins addressing this specific code in the 2018 GMC Sierra model.

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