B087A - Understanding the Seat Position Sensor Circuit Range/Performance Problem in 2015-2020 Chevrolet Silverado

Quick Answer

B087A means: The B087A code indicates a problem with the seat position sensor circuit, affecting airbag deployment.

Fix: Check and replace faulty components Cost: $150 - $300 Time: 90-180 minutes

Can I drive with B087A? Immediate attention is advised to prevent safety risks.

Common Questions

What does B087A mean and how does it affect my car?

The B087A code indicates a malfunction in the seat position sensor circuit. This could lead to improper airbag deployment during an accident, potentially compromising your safety. Addressing this issue is crucial to ensure that your airbag system works correctly in case of an emergency.

What are the most common causes of B087A and how much does it cost to fix?

Common causes of B087A include a faulty seat position sensor, damaged wiring, or issues with the body control module. Repair costs can vary, typically ranging from $150 for sensor replacement to $200 for wiring repairs, depending on the specific issue.

Can I drive my car with B087A or should I stop immediately?

While it's technically possible to drive with the B087A code, it's not recommended. This code indicates a potential safety issue with your airbag system, which could lead to serious consequences in the event of an accident. It's best to have the issue diagnosed and repaired as soon as possible.

How can I diagnose B087A myself using GeekOBD APP?

To diagnose B087A using the GeekOBD APP, start by connecting the app to your vehicle's OBD2 port. Run a full scan to retrieve error codes and review any freeze frame data. This information will help you understand the circumstances surrounding the error and guide your troubleshooting process.

What vehicles are most commonly affected by B087A?

The B087A code is frequently reported in 2015-2020 Chevrolet Silverado and GMC Sierra models. If you own one of these vehicles, it's a good idea to keep an eye out for any warning lights or unusual behavior related to the seat position.

How can I prevent B087A from happening again?

To prevent the B087A code from reoccurring, ensure regular maintenance checks of your vehicle's electrical system, especially the wiring and connectors related to the seat position sensor. Keeping the interior dry and clean will also help reduce moisture-related issues.

What is B087A?

The DTC code B087A refers to a seat position sensor circuit range/performance problem. It indicates that the vehicle’s onboard computer has detected an issue with the seat position sensor, which is crucial for ensuring the seat is in the correct position for safe operation. This code is particularly common in vehicles like the 2015-2020 Chevrolet Silverado and GMC Sierra. The seat position sensor helps the vehicle's systems to know how far the seat is adjusted, which directly affects the deployment of airbags in the event of an accident. If this sensor fails or sends incorrect data, it could lead to improper airbag deployment, which poses significant safety risks. This code may also trigger the airbag warning light, prompting drivers to seek immediate attention. Ignoring this code could lead to serious safety issues down the line, as the car may not be equipped to handle accidents effectively. Drivers might notice discomfort or instability in the seat position, which can affect their driving experience. Regular checks and diagnostics can help catch this issue early, especially if the seat position warning light appears.

System: B - Body (Airbags, Lighting, Security, Climate Control)

Symptoms

Common symptoms when B087A is present:

  • The airbag warning light remains illuminated, signaling a potential issue with the airbag system.
  • Unusual seat movement or instability while driving, making it difficult to maintain a comfortable and safe driving position.
  • Inconsistent seat position memory settings, causing the seat to revert to a previous position unexpectedly.
  • Driver discomfort due to improper seat positioning, which can lead to fatigue on longer drives.
  • Possible issues with other safety features, like seatbelt reminders or other related sensors not functioning correctly.

Possible Causes

Most common causes of B087A (ordered by frequency):

  1. The most common cause of the B087A code is a faulty seat position sensor, which accounts for about 60% of cases. This sensor may fail due to wear and tear or exposure to moisture.
  2. A second cause could be damaged wiring or connections in the seat position sensor circuit, which can lead to intermittent or complete sensor failure. This issue is often exacerbated by extreme temperature changes.
  3. Another possible cause is a malfunctioning body control module (BCM), which can misinterpret the signals from the seat position sensor. Regular diagnostic scans can help identify this issue early.
  4. Less common but serious is a wiring harness that has been pinched or damaged, which can lead to loss of connectivity and further complications within the airbag system.
  5. A rare cause may involve software issues within the vehicle’s computer systems, which can sometimes be resolved with a software update from the manufacturer.

B087A Repair Costs

Cost Breakdown by Repair Type

Seat Position Sensor Replacement

Replacing the faulty seat position sensor with a new one.

  • Total: $150 - $300
  • Success rate: 90%
Wiring Repair

Repairing or replacing damaged wiring or connectors.

  • Total: $100 - $200
  • Success rate: 85%
Money-Saving Tips for B087A
  • Start with the most common and least expensive repairs first
  • Use GeekOBD APP to confirm diagnosis before replacing expensive parts
  • Consider preventive maintenance to avoid future occurrences
  • Compare prices for OEM vs aftermarket parts based on your needs
  • Address the issue promptly to prevent more expensive secondary damage

Diagnostic Steps

Professional B087A Diagnosis Process

Follow these systematic steps to accurately diagnose B087A. Each step builds on the previous one to ensure accurate diagnosis.

Step 1: Step 1: Initial visual inspection - Look for damaged wiring, loose connections, or corrosion around the seat position sensor area (5-10 minutes)

Step 1: Initial visual inspection - Look for damaged wiring, loose connections, or corrosion around the seat position sensor area (5-10 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 2: Step 2: OBD2 scan with GeekOBD APP - Use the app to retrieve all codes and freeze frame data to understand the fault context, which helps in narrowing down the issue (10-15 minutes)

Step 2: OBD2 scan with GeekOBD APP - Use the app to retrieve all codes and freeze frame data to understand the fault context, which helps in narrowing down the issue (10-15 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 3: Step 3: Component testing - Utilize a multimeter to test the seat position sensor for proper voltage and continuity, checking for any irregular readings (20-30 minutes)

Step 3: Component testing - Utilize a multimeter to test the seat position sensor for proper voltage and continuity, checking for any irregular readings (20-30 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 4: Step 4: System function test - After any repairs, verify the operation of the seat position sensor and clear codes to ensure the issue is resolved (10-15 minutes)

Step 4: System function test - After any repairs, verify the operation of the seat position sensor and clear codes to ensure the issue is resolved (10-15 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 5: Step 5: Road test verification - Drive the vehicle under various conditions to confirm the seat position sensor and related components are functioning correctly (15-20 minutes)

Step 5: Road test verification - Drive the vehicle under various conditions to confirm the seat position sensor and related components are functioning correctly (15-20 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.

Important Notes

  • Always verify the repair with GeekOBD APP after completing diagnostic steps
  • Clear codes and test drive to ensure the problem is resolved
  • Address underlying causes to prevent code recurrence

Real Repair Case Studies

Case Study 1: Seat Position Sensor Replacement on 2016 Chevrolet Silverado

Vehicle: 2016 Chevrolet Silverado, 65,000 miles

Problem: The customer reported that the airbag warning light was illuminated, and the seat position seemed unstable.

Diagnosis: After running an OBD2 scan using the GeekOBD APP, the B087A code was confirmed. A visual inspection revealed a damaged seat position sensor.

Solution: The faulty sensor was replaced with a new OEM part. The wiring was also checked for any signs of damage.

Cost: $220 (parts: $150 for sensor, $70 for labor)

Result: The repair resolved the issue, and the airbag light was cleared, with the customer reporting satisfaction with the outcome.

Case Study 2: Wiring Repair on 2018 GMC Sierra

Vehicle: 2018 GMC Sierra, 45,000 miles

Problem: The airbag light was on, and the seat position did not register correctly.

Diagnosis: Using the GeekOBD APP, the B087A code was retrieved. Further inspection revealed a damaged wiring harness.

Solution: The damaged section of the wiring was repaired, and connections were restored to factory specifications.

Cost: $150 (parts: $50 for connectors, $100 for labor)

Result: Following the repair, the airbag light turned off, and the seat functioned properly, ensuring the customer’s safety.

Diagnose B087A

Use GeekOBD APP for professional diagnosis!

  • Real-time data monitoring
  • Advanced diagnostic features
  • Step-by-step repair guidance
  • Professional-grade analysis
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Code Information

Code: B087A
System: Body (Airbags, Lighting, Security, Climate Control)
Severity: HIGH
Category: Body Codes