AutoCodes – GMC – B0085 2018 GMC Sierra

B0085 2018 GMC Sierra Code - Left Front Side Impact Sensor

Quick Answer

The impact sensors are equipped on vehicles to supplement the supplemental inflatable restraint (SIR) system performance. Common causes include Faulty Left Front Side Impact Sensor, Left Front Side Impact Sensor harness is open or shorted, Left Front Side Impact Sensor 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: B0085 2018 GMC Sierra indicates Left Front Side Impact Sensor.
Common causes: Common causes include Faulty Left Front Side Impact Sensor, Left Front Side Impact Sensor harness is open or shorted, Left Front Side Impact Sensor 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 358

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 Nov 06, 2022

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code B0085 2018 GMC Sierra Description

The impact sensors are equipped on vehicles to supplement the supplemental inflatable restraint (SIR) system performance. The impact sensors are electronic and are not part of the deployment loops, but instead provide inputs to the Inflatable Restraint Sensing and Diagnostic Module (SDM). The impact sensors can assist in determining the severity of some frontal and side collisions. The Inflatable Restraint Sensing and Diagnostic Module use the input from the impact sensors to assist in determining the severity of a collision, further supporting air bag deployment. If the Inflatable Restraint Sensing and Diagnostic Module determines a deployment is warranted, the Inflatable Restraint Sensing and Diagnostic Module will cause current to flow through the deployment loops deploying the air bags.

OBDII Code B0085 2018 GMC Sierra - Left Front Side Impact Sensor - AutoCodes.com — B0085 2018 GMC Sierra Code - Left Front Side Impact Sensor

What does this mean?

What are the Possible Causes of the DTC B0085 2018 GMC Sierra?

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

How to Fix the DTC B0085 2018 GMC Sierra?

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 does this mean?

Code Tech Notes

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

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B0085 2018 GMC Sierra 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 B0085 2018 GMC Sierra code?

Need more information on how to fix the B0085 2018 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B0085 2018 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 2018 GMC Sierra Code

1. What does OBDII code B0085 for a 2018 GMC Sierra mean?

The code B0085 indicates a fault in the left front side impact sensor of the vehicle.

2. What are the common symptoms of a faulty left front side impact sensor in a 2018 GMC Sierra?

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

3. What are the possible causes of OBDII code B0085 in a 2018 GMC Sierra?

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

4. How can I diagnose the issue related to code B0085 in my 2018 GMC Sierra?

Diagnosis involves using a scan tool to retrieve the specific fault code, inspecting the left front side impact sensor and its wiring for any visible damage, and testing the sensor's functionality.

5. Can I continue to drive my 2018 GMC Sierra with OBDII code B0085 present?

It is not recommended to drive the vehicle with this fault code as it may affect the proper functioning of the airbag system in the event of a collision.

6. What is the typical repair process for resolving OBDII code B0085 in a 2018 GMC Sierra?

Repair usually 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 2018 GMC Sierra?

Yes, a faulty sensor can compromise the effectiveness of the airbag system, potentially putting occupants at risk in the event of a side impact collision.

8. How much does it cost to repair OBDII code B0085 in a 2018 GMC Sierra?

The cost of repair can vary depending on the specific issue, but it typically involves the cost of the sensor itself, labor charges, and any additional parts needed for the repair.

9. Can I reset the OBDII code B0085 in my 2018 GMC Sierra without fixing the underlying issue?

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

10. How can I prevent OBDII code B0085 from reoccurring in my 2018 GMC Sierra?

Regularly inspecting the airbag system components, ensuring proper maintenance of the vehicle's sensors, and addressing any issues promptly can help prevent the recurrence of this fault code.