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Engine-Codes – Generic – B2986

B2986 Code - Deployable Steering Column Circuit Short To Ground

Quick Answer

The B2986 diagnostic trouble code (DTC) indicates a deployable steering column circuit short to ground. Common causes include Wiring harness damage or wear, Loose or corroded connections in the deployable steering column circuit, Faulty deployable steering column module. 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
B2986 indicates Deployable Steering Column Circuit Short To Ground.
Common causes
Common causes include Wiring harness damage or wear, Loose or corroded connections in the deployable steering column circuit, Faulty deployable steering column module.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 07, 2024
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Code B2986 Description

The B2986 diagnostic trouble code (DTC) indicates a deployable steering column circuit short to ground. In vehicles equipped with a deployable steering column, this code signals a malfunction in the system that controls the automatic adjustment of the steering column's position. The deployable steering column is designed to move into a safer position in the event of a collision, reducing the risk of injury to the driver. A short to ground in this circuit can prevent the steering column from deploying when needed, compromising the vehicle's safety features.

OBDII Code B2986 - Deployable Steering Column Circuit Short To Ground
B2986 Code - Deployable Steering Column Circuit Short To Ground

Common Causes of B2986

  1. Wiring harness damage or wear.
  2. Loose or corroded connections in the deployable steering column circuit.
  3. Faulty deployable steering column module.
  4. Short circuit in the deployable steering column circuit.
  5. Electrical issues in the vehicle's wiring system.

Symptoms of B2986

  1. Airbag warning light illuminated on the dashboard.
  2. Deployable steering column system not responding to collision detection.
  3. Steering column position not adjusting automatically.
  4. Deployable steering column switch not functioning properly.

How to Fix B2986

  1. Begin by conducting a thorough inspection of the wiring harness and connections in the deployable steering column circuit to identify any damage or loose connections.
  2. Test the deployable steering column module for proper functionality and replace it if necessary.
  3. Check for any short circuits in the circuit and repair or replace the affected components.
  4. Clear the DTC from the vehicle's computer system using a diagnostic scanner to reset the system and ensure proper operation.
  5. Test the deployable steering column system to verify that it adjusts automatically in response to collision detection.

Cost to Fix B2986

The cost of repairing a deployable steering column circuit short to ground can vary depending on the extent of the damage and the specific components that need to be replaced. In general, the repair costs for this issue can range from $200 to $500, including parts and labor. However, it's important to note that diagnostic time and labor rates at auto repair shops can vary significantly based on factors such as location, vehicle make and model, and engine type. It's recommended to consult with a professional mechanic to get an accurate estimate based on your vehicle's specific needs.

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Code B2986 Information for Specific Makes

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 B2986 Code

1. What does the OBDII code B2986 mean?

Code B2986 indicates a short to ground in the deployable steering column circuit, which is part of the vehicle's safety system designed to minimize injury during a collision.

2. What are the common symptoms of a B2986 code?

Symptoms may include an illuminated airbag or SRS warning light, failure of the steering column to deploy properly during a crash, or stored crash-related fault codes.

3. What causes the B2986 code to trigger?

Common causes include damaged wiring, a faulty deployable steering column module, corroded or loose electrical connections, or an impact-related failure.

4. How do I diagnose the B2986 code?

Diagnosis involves inspecting the wiring and connectors for damage or corrosion, testing the deployable steering column module, and checking for other related fault codes.

5. Can I drive with a B2986 code active?

While the vehicle may still operate, driving with this code is not recommended as it indicates a potential safety system failure.

6. How is the B2986 code repaired?

Repairs typically include fixing or replacing damaged wiring, reconnecting or cleaning corroded connectors, or replacing the deployable steering column module if necessary.

7. How much does it cost to fix a B2986 code?

Repair costs vary depending on the issue but can range from $100 for wiring repairs to over $1,000 if the deployable steering column module needs replacement.

8. Can I clear the B2986 code without fixing it?

Clearing the code without addressing the root cause will not resolve the issue and may cause it to return, potentially compromising the vehicle's safety.

9. Is the B2986 code related to the airbag system?

Yes, it is directly related to the airbag and Supplemental Restraint System (SRS), specifically the deployable steering column component.

10. What tools are needed to troubleshoot the B2986 code?

Tools required may include an OBDII scanner, a multimeter for testing electrical circuits, and wiring diagrams for your specific vehicle.

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