AutoCodes – Generic – B0012:02

B0012:02 Code - Driver Steering Wheel Air Bag Deployment Loop Stage 1 Short to Ground

Quick Answer

During a frontal crash of sufficient force, the inflatable restraint Sensing and Diagnostic Module (SDM) will allow current to flow through the deployment loop in order to deploy the steering wheel air bag. Common causes include Faulty Steering Wheel Air Bag, Faulty Steering Wheel Air Bag Coil, Steering Wheel Air Bag harness is open or shorted. 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: B0012:02 indicates Driver Steering Wheel Air Bag Deployment Loop Stage 1 Short to Ground.
Common causes: Common causes include Faulty Steering Wheel Air Bag, Faulty Steering Wheel Air Bag Coil, Steering Wheel Air Bag harness is open or shorted.
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 557

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 05, 2022

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code B0012:02 Description

During a frontal crash of sufficient force, the inflatable restraint Sensing and Diagnostic Module (SDM) will allow current to flow through the deployment loop in order to deploy the steering wheel air bag. The SDM performs continuous diagnostic tests on the deployment loops to check for proper circuit continuity and for shorts to ground or voltage. There are two shorting bars used within the steering wheel air bag coil connector which will short together both steering wheel air bag stage 1 high control circuit and steering wheel air bag stage 1 low control circuit and both steering wheel air bag stage 2 high control circuit and steering wheel air bag stage 2 low control circuit when the connector is disconnected. This will help to prevent unwanted deployment of the steering wheel air bag during servicing. The Diagnostic Trouble Code (DTC) will be set when the steering wheel air bag deployment loop is shorted to ground for 2 s.

OBDII Code B0012:02 - Driver Steering Wheel Air Bag Deployment Loop Stage 1 Short to Ground - AutoCodes.com — B0012:02 Code - Driver Steering Wheel Air Bag Deployment Loop Stage 1 Short to Ground

What does this mean?

What are the Possible Causes of the DTC B0012:02?

Faulty Steering Wheel Air Bag
Faulty Steering Wheel Air Bag Coil
Steering Wheel Air Bag harness is open or shorted
Steering Wheel Air Bag circuit poor electrical connection
Faulty Sensing and Diagnostic Module (SDM)

How to Fix the DTC B0012:02?

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

B0012:01 Driver Frontal Deployment Loop Stage 1 Short to Battery
B0012:02 Driver Frontal Deployment Loop Stage 1 Short to Ground
B0012:04 Driver Frontal Deployment Loop Stage 1 Open Circuit
B0012:0D Driver Frontal Deployment Loop Stage 1 High Resistance
B0012:0E Driver Frontal Deployment Loop Stage 1 Low Resistance

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B0012:02 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 B0012:02 code?

Need more information on how to fix the B0012:02 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B0012:02 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 B0012:02 Code

1. What are common symptoms of OBDII code B0012:02?

- Common symptoms include the airbag warning light being illuminated on the dashboard and potential non-deployment of the driver's steering wheel airbag in the event of a collision.

2. What does the OBDII code B0012:02 indicate?

- This code indicates a Driver Steering Wheel Air Bag Deployment Loop Stage 1 Short to Ground, meaning there is a short circuit detected in the airbag deployment loop.

3. What are the possible causes of OBDII code B0012:02?

- Possible causes include damaged wiring in the airbag system, a faulty clock spring, a malfunctioning airbag module, or a problem with the airbag deployment loop itself.

4. How can I diagnose the issue related to OBDII code B0012:02?

- Diagnosis typically involves using a professional OBDII scanner to retrieve the trouble codes, followed by a thorough inspection of the airbag system components, wiring, and connections for any visible damage or issues.

5. Is it safe to drive with OBDII code B0012:02 present?

- It is not recommended to drive with this code present, as it indicates a potential issue with the driver's steering wheel airbag system, which may compromise safety in the event of a collision.

6. Can OBDII code B0012:02 be reset without fixing the underlying issue?

- While the code can be cleared with an OBDII scanner, it is crucial to address the root cause of the problem to ensure the proper functioning of the driver's steering wheel airbag system.

7. How can I repair OBDII code B0012:02?

- Repairing this code may involve fixing or replacing damaged wiring, replacing the clock spring or airbag module if faulty, or addressing any issues with the airbag deployment loop to resolve the short to ground condition.

8. Is it possible to fix OBDII code B0012:02 at home?

- While some DIY enthusiasts may attempt to diagnose and repair this code at home, it is recommended to consult with a professional mechanic or service center due to the critical nature of airbag system repairs.

9. How much does it typically cost to repair OBDII code B0012:02?

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

10. Can OBDII code B0012:02 be a recurring issue after repair?

- If the underlying cause of the code is not properly addressed during repair, it is possible for OBDII code B0012:02 to reoccur. It is essential to ensure a thorough diagnosis and repair to prevent recurrence.