AutoCodes – Hummer – B0085 Hummer

B0085 Hummer 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 Hummer 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 2,875

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 Hummer 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 Hummer - Left Front Side Impact Sensor - AutoCodes.com — B0085 Hummer Code - Left Front Side Impact Sensor

What does this mean?

What are the Possible Causes of the DTC B0085 Hummer?

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 Hummer?

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 Hummer 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 Hummer code?

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

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Get the B0085 Hummer 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 Hummer Code

1. What are the common symptoms of OBDII code B0085 in a Hummer related to the Left Front Side Impact Sensor?

The common symptoms include the airbag warning light illuminated on the dashboard and a potential message indicating an issue with the left front side impact sensor.

2. What are the possible causes of OBDII code B0085 in a Hummerâ€™s Left Front Side Impact Sensor?

The code B0085 in a Hummer's Left Front Side Impact Sensor can be caused by a faulty sensor itself, a wiring issue, or a problem with the airbag control module.

3. How can I diagnose the OBDII code B0085 in a Hummer's Left Front Side Impact Sensor?

Diagnosing OBDII code B0085 involves using a diagnostic scanner to retrieve the specific fault codes, inspecting the wiring and connections to the left front side impact sensor, and testing the sensor's functionality.

4. Is it safe to drive my Hummer with OBDII code B0085 related to the Left Front Side Impact Sensor?

It is not recommended to drive your Hummer with an active airbag-related fault code such as B0085, as it may compromise the proper functioning of the airbag system in the event of a collision.

5. How can I repair OBDII code B0085 in my Hummer's Left Front Side Impact Sensor?

To repair OBDII code B0085, you may need to replace the left front side impact sensor if it's faulty, repair any damaged wiring or connectors, and reset the airbag control module after the repair is completed.

6. Can a DIY enthusiast fix OBDII code B0085 related to the Left Front Side Impact Sensor in a Hummer?

While some basic diagnostic steps can be performed by a DIY enthusiast, repairing OBDII code B0085 usually requires specialized tools and knowledge, so it's recommended to consult a professional mechanic for proper diagnosis and repair.

7. How much does it typically cost to repair OBDII code B0085 in a Hummer's Left Front Side Impact Sensor?

The cost of repairing OBDII code B0085 can vary depending on the specific issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.

8. Will resetting the OBDII code B0085 related to the Left Front Side Impact Sensor make it go away permanently?

Resetting the OBDII code B0085 may temporarily clear the fault code, but if the underlying issue with the Left Front Side Impact Sensor is not addressed, the code is likely to reappear once the system detects the problem again.

9. How important is it to fix OBDII code B0085 in a Hummer's Left Front Side Impact Sensor promptly?

It is crucial to address OBDII code B0085 promptly, as it indicates a potential problem with the airbag system's readiness to deploy in case of a collision, compromising occupant safety.

10. Can OBDII code B0085 related to the Left Front Side Impact Sensor cause the airbags not to deploy in a crash?

Yes, OBDII code B0085 indicating a fault in the Left Front Side Impact Sensor can lead to the airbags not deploying as intended during a collision, putting occupants at risk of injury.