B0085 2015 GMC Sierra Code - Left Front Side Impact Sensor
Quick Answer
The B0085 diagnostic trouble code for a 2015 GMC Sierra specifically relates to the left front side impact sensor. Common causes include Impact or damage to the left front fender area where the sensor is located, Faulty wiring or connections to the sensor, Corrosion or moisture intrusion affecting the sensor. 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 2015 GMC Sierra indicates Left Front Side Impact Sensor.
- Common causes
- Common causes include Impact or damage to the left front fender area where the sensor is located, Faulty wiring or connections to the sensor, Corrosion or moisture intrusion affecting the sensor.
- 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 2015 GMC Sierra Description
The B0085 diagnostic trouble code for a 2015 GMC Sierra specifically relates to 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 if necessary. When this sensor is not functioning correctly, it can compromise the overall safety of the vehicle in the event of a collision.
Common Causes of B0085 2015 GMC Sierra
- Impact or damage to the left front fender area where the sensor is located
- Faulty wiring or connections to the sensor
- Corrosion or moisture intrusion affecting the sensor
- Malfunctioning airbag control module
- Manufacturing defects in the sensor itself
Symptoms of B0085 2015 GMC Sierra
- Airbag warning light illuminated on the dashboard
- Inaccurate or inconsistent airbag deployment in test scenarios
- Crash data errors stored in the airbag control module
- Sudden airbag deployment without impact
How to Fix B0085 2015 GMC Sierra
- Inspect the left front fender area for any signs of impact or damage that may have affected the sensor.
- Check the wiring and connections to the sensor for any breaks, corrosion, or loose connections. Repair or replace as needed.
- Test the sensor for proper functionality using a diagnostic scan tool to determine if it is sending the correct signals to the airbag control module.
- If the sensor is found to be faulty, replace it with a new sensor from the manufacturer to ensure proper operation.
- Clear the diagnostic trouble codes from the airbag control module and perform a test to verify that the issue has been resolved.
Cost to Fix B0085 2015 GMC Sierra
The typical repair costs for addressing a B0085 diagnostic trouble code related to the left front side impact sensor on a 2015 GMC Sierra can range from $200 to $500, including parts and labor. However, it is important to note that the specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. It is recommended to check with local service providers for a more accurate estimate.
Tech Notes for B0085 2015 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 2015 GMC Sierra Code
1. What does OBDII code B0085 mean on a 2015 GMC Sierra?
Code B0085 indicates an issue with the left front side impact sensor, which is a critical part of the vehicle's airbag system.
2. What are the symptoms of code B0085 in a 2015 GMC Sierra?
Common symptoms include the airbag warning light staying on, a stored trouble code, and possible malfunction of the airbag system.
3. What causes code B0085 to appear?
This code is typically caused by a faulty left front side impact sensor, damaged wiring or connectors, or issues in the airbag control module.
4. Is it safe to drive with code B0085 active?
Driving with this code may be unsafe, as it can indicate a malfunction in the airbag system, which could fail to deploy in an accident.
5. How do you diagnose code B0085 on a GMC Sierra?
Diagnosis involves scanning for fault codes, visually inspecting the sensor and wiring for damage, and testing the sensor with a multimeter to confirm functionality.
6. Can code B0085 be caused by a dead battery?
While unlikely, a dead or weak battery could cause communication issues with the sensor, but the primary cause is usually a faulty sensor or wiring.
7. How do you fix code B0085 in a 2015 GMC Sierra?
The fix typically involves replacing the left front side impact sensor, repairing damaged wiring, or reconnecting loose connectors.
8. How much does it cost to repair code B0085?
Repair costs can range from $150 to $400, depending on whether the sensor, wiring, or both need to be replaced.
9. Can I clear code B0085 without fixing the issue?
Clearing the code without addressing the root cause will only temporarily remove the warning and the code will likely return.
10. Where is the left front side impact sensor located on a 2015 GMC Sierra?
The left front side impact sensor is typically located near the lower portion of the driver-side door or in the B-pillar area.
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