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Engine-Codes – GMC – B0085 2017 GMC Sierra

B0085 2017 GMC Sierra Code - Left Front Side Impact Sensor

Quick Answer

The B0085 diagnostic trouble code (DTC) for a 2017 GMC Sierra specifically refers to the Left Front Side Impact Sensor. Common causes include Wiring harness damage or corrosion, Faulty left front side impact sensor, Issues with the airbag control module. 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
B0085 2017 GMC Sierra indicates Left Front Side Impact Sensor.
Common causes
Common causes include Wiring harness damage or corrosion, Faulty left front side impact sensor, Issues with the airbag control module.
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 17, 2024
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Code B0085 2017 GMC Sierra Description

The B0085 diagnostic trouble code (DTC) for a 2017 GMC Sierra specifically refers to the Left Front Side Impact Sensor. This sensor is a crucial component of the vehicle's Supplemental Restraint System (SRS), also known as the airbag system. The purpose of the side impact sensor is to detect a collision or impact on the left front side of the vehicle and send a signal to the airbag control module to deploy the appropriate airbags to protect the occupants in the event of a crash.

OBDII Code B0085 2017 GMC Sierra - Left Front Side Impact Sensor
B0085 2017 GMC Sierra Code - Left Front Side Impact Sensor

Common Causes of B0085 2017 GMC Sierra

  1. Wiring harness damage or corrosion
  2. Faulty left front side impact sensor
  3. Issues with the airbag control module
  4. Loose or disconnected connectors
  5. Impact or collision that damaged the sensor

Symptoms of B0085 2017 GMC Sierra

  1. Airbag warning light illuminated on the dashboard
  2. SRS warning message displayed on the instrument cluster
  3. Airbags may not deploy in a collision on the left front side
  4. Fault codes related to the SRS system stored in the vehicle's computer

How to Fix B0085 2017 GMC Sierra

  1. Begin by conducting a thorough inspection of the left front side impact sensor, wiring, and connectors.
  2. Test the sensor using a multimeter to check for proper functionality.
  3. Replace the sensor if it is found to be faulty or damaged.
  4. Repair or replace any damaged wiring or connectors.
  5. Clear the fault codes from the vehicle's computer and perform a test drive to ensure the issue has been resolved.

Cost to Fix B0085 2017 GMC Sierra

The cost of repairing the B0085 code on a 2017 GMC Sierra can vary depending on the specific cause of the issue and the labor rates in your area. On average, the cost of replacing a side impact sensor can range from $200 to $500, including parts and labor. However, additional costs may apply if there are other components that need to be repaired or replaced. It's recommended to consult with a professional mechanic or auto repair shop to get an accurate estimate for your specific situation. Keep in mind that labor rates can vary between different repair facilities, so it's advisable to shop around for the best price.

What does this mean?

Tech Notes for B0085 2017 GMC Sierra

B0085:02 Left Front Side Impact Sensor Short to Ground

B0085:05 Left Front Side Impact Sensor High Voltage/Open

B0085:0F Left Front Side Impact Sensor Signal Erratic

B0085:39 Left Front Side Impact Sensor Internal Malfunction

B0085:3A Left Front Side Impact Sensor Incorrect Component Installed

B0085:71 Left Front Side Impact Sensor Invalid Data

Need more information about the B0085 2017 GMC Sierra code?

Need more information on how to fix the B0085 2017 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B0085 2017 GMC Sierra 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 B0085 2017 GMC Sierra Code

1. What does OBDII code B0085 for a 2017 GMC Sierra indicate?

The code B0085 specifically refers to a fault in the left front side impact sensor of the vehicle.

2. What are the common symptoms of a left front side impact sensor issue in a 2017 GMC Sierra?

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

3. What are the possible causes of OBDII code B0085 in a 2017 GMC Sierra?

Potential causes of this code include a malfunctioning left front side impact sensor, wiring issues, or a problem with the airbag control module.

4. How can I diagnose a left front side impact sensor problem in my 2017 GMC Sierra?

Diagnosis typically involves using a scan tool to retrieve the specific fault code, inspecting the sensor and its wiring for damage, and testing the sensor's functionality.

5. Can I still drive my 2017 GMC Sierra with OBDII code B0085?

It is not recommended to drive the vehicle with an active airbag system fault code, as it may affect the proper deployment of airbags in the event of a collision.

6. How can I repair OBDII code B0085 in my 2017 GMC Sierra?

Repairing this code often involves replacing the left front side impact sensor, repairing any damaged wiring, and clearing the fault code from the vehicle's system.

7. Are there any safety concerns associated with a malfunctioning left front side impact sensor in a 2017 GMC Sierra?

Yes, a malfunctioning sensor can compromise the effectiveness of the airbag system during a collision, potentially putting occupants at greater risk of injury.

8. Can I reset the OBDII code B0085 in my 2017 GMC Sierra without repairing the issue?

While you can clear the fault code using a scan tool, it is crucial to address the underlying problem to ensure the proper functioning of the airbag system.

9. How much does it typically cost to repair OBDII code B0085 in a 2017 GMC Sierra?

The cost of repair can vary depending on the extent of the issue, but it may involve parts and labor expenses for sensor replacement and wiring repairs.

10. Is it necessary to visit a dealership for repairs related to OBDII code B0085 in a 2017 GMC Sierra?

While a dealership may have specialized knowledge and tools for the repair, an experienced mechanic or automotive technician can also effectively diagnose and fix the issue.

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