B0085 2018 GMC Sierra Code - Left Front Side Impact Sensor
Quick Answer
The B0085 code on a 2018 GMC Sierra indicates a problem with the Left Front Side Impact Sensor. Common causes include Faulty left front side impact sensor, Damaged wiring or connectors leading to the sensor, Corrosion or debris affecting sensor function. 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, Damaged wiring or connectors leading to the sensor, Corrosion or debris affecting sensor function.
- 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 B0085 2018 GMC Sierra Description
The B0085 code on a 2018 GMC Sierra indicates a problem with the Left Front Side Impact Sensor. This sensor is a crucial component of the vehicle's safety system, designed to detect impacts on the left side of the vehicle and trigger the deployment of the airbags in the event of a collision. When this sensor malfunctions or fails to communicate properly with the vehicle's computer system, it can compromise the effectiveness of the airbag system, putting the occupants at risk in the event of an accident.
Common Causes of B0085 2018 GMC Sierra
- Faulty left front side impact sensor.
- Damaged wiring or connectors leading to the sensor.
- Corrosion or debris affecting sensor function.
- Airbag control module malfunction.
- Impact or collision causing sensor damage.
Symptoms of B0085 2018 GMC Sierra
- Airbag warning light illuminated on the dashboard.
- Left front airbag system not deploying in a collision.
- Inaccurate or inconsistent airbag deployment.
- Diagnostic trouble code B0085 stored in the vehicle's computer system.
How to Fix B0085 2018 GMC Sierra
- Connect a diagnostic scanner to the vehicle's onboard computer to retrieve the specific trouble code (B0085) and confirm the issue with the left front side impact sensor.
- Inspect the sensor, wiring, and connectors for any visible damage or corrosion. Replace any damaged components as needed.
- Test the sensor's functionality using a multimeter or oscilloscope to ensure it is detecting impacts accurately.
- Clear the trouble code from the vehicle's computer system and perform a test drive to verify that the airbag system is functioning correctly.
- If the issue persists, further diagnostics may be necessary to identify any underlying problems with the airbag control module or other related components.
Cost to Fix B0085 2018 GMC Sierra
The typical repair costs for addressing a B0085 code on a 2018 GMC Sierra can vary depending on the specific cause of the issue and the extent of repairs needed. In general, replacing a faulty side impact sensor can cost between $200 and $500, including parts and labor. However, additional diagnostic time and labor rates at auto repair shops can affect the overall cost. It is advisable to consult with a qualified technician or repair shop for a more accurate estimate based on the specific circumstances of your vehicle.
Tech Notes for B0085 2018 GMC Sierra
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
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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.
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.
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