AutoCodes – GMC – B0085 GMC

B0085 GMC 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 GMC 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 4,043

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 Oct 24, 2022

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code B0085 GMC 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 GMC - Left Front Side Impact Sensor - AutoCodes.com — B0085 GMC Code - Left Front Side Impact Sensor

What does this mean?

What are the Possible Causes of the DTC B0085 GMC?

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 GMC?

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 GMC 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 GMC code?

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

Need Help with the Code?

Get the B0085 GMC code diagnosed by a professional: Find a repair shop in your area

Information for Specific GMC Models

B0085 2014 GMC Sierra — Left Front Side Impact Sensor
B0085 2015 GMC Sierra — Left Front Side Impact Sensor
B0085 2016 GMC Sierra — Left Front Side Impact Sensor
B0085 2017 GMC Sierra — Left Front Side Impact Sensor
B0085 2018 GMC Sierra — Left Front Side Impact Sensor

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 GMC Code

1. What are the common symptoms of OBDII code B0085 GMC (Left Front Side Impact Sensor)?

The common symptoms of OBDII code B0085 GMC include the airbag warning light on the dashboard illuminating, potential non-deployment of the left front airbag during a collision, and diagnostic trouble codes related to the left front side impact sensor.

2. What are the possible causes of OBDII code B0085 GMC (Left Front Side Impact Sensor)?

Possible causes of OBDII code B0085 GMC include a faulty left front side impact sensor, wiring issues such as short circuits or open circuits, or a malfunction in the airbag control module.

3. How can I diagnose the OBDII code B0085 GMC (Left Front Side Impact Sensor)?

Diagnosing OBDII code B0085 GMC involves using a scan tool to retrieve the specific trouble code, inspecting the wiring and connections related to the left front side impact sensor, and performing component testing to determine if the sensor is faulty.

4. Can I drive my vehicle with OBDII code B0085 GMC (Left Front Side Impact Sensor)?

It is not recommended to drive your vehicle with OBDII code B0085 GMC, as it indicates a potential issue with the left front side impact sensor, which plays a crucial role in the proper functioning of the airbag system during a collision.

5. How can I repair OBDII code B0085 GMC (Left Front Side Impact Sensor)?

Repairing OBDII code B0085 GMC may involve replacing the left front side impact sensor, repairing any damaged wiring or connectors, or reprogramming the airbag control module to resolve the issue.

6. Is it safe to reset the OBDII code B0085 GMC (Left Front Side Impact Sensor)?

While you can reset the OBDII code B0085 GMC using a scan tool, it is important to address the root cause of the issue first to ensure the safety and functionality of the airbag system in your vehicle.

7. Can a DIY enthusiast fix OBDII code B0085 GMC (Left Front Side Impact Sensor)?

DIY enthusiasts may be able to address OBDII code B0085 GMC by following repair guides, but it is recommended to have proper knowledge and experience working with airbag systems to ensure the repair is done correctly and safely.

8. How much does it cost to fix OBDII code B0085 GMC (Left Front Side Impact Sensor)?

The cost of fixing OBDII code B0085 GMC can vary depending on the root cause of the issue, the extent of repairs needed, and whether you choose to do it yourself or seek professional help. Costs may include parts, labor, and diagnostic fees.

9. Will OBDII code B0085 GMC (Left Front Side Impact Sensor) affect vehicle safety?

OBDII code B0085 GMC indicates a potential issue with the left front side impact sensor, which can impact the proper deployment of the airbag during a collision, potentially compromising vehicle safety. It is important to address this code promptly.

10. How often does OBDII code B0085 GMC (Left Front Side Impact Sensor) occur in GMC vehicles?

OBDII code B0085 GMC (Left Front Side Impact Sensor) can occur in GMC vehicles equipped with a left front side impact sensor, especially in models that have been in accidents or have experienced wiring issues. Regular maintenance and inspection can help prevent this code from appearing.