B0042 Buick Code - Driver Frontal Deployment Loop Stage 2 Resistance Low
Quick Answer
The driver deployment loop consists of the following components: - A dual-stage inflatable restraint steering wheel module - The inflatable restraint steering wheel module coil - The steering wheel module high circuits for both stages 1 and 2 - The steering wheel module low circuits for both stages 1 and 2 There are 2 shorting bars used within the steering wheel module coil connector. Common causes include Faulty Steering Wheel Module Coil, Steering Wheel Module Coil harness is open or shorted, Steering Wheel Module Coil circuit poor electrical connection. 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
- B0042 Buick indicates Driver Frontal Deployment Loop Stage 2 Resistance Low.
- Common causes
- Common causes include Faulty Steering Wheel Module Coil, Steering Wheel Module Coil harness is open or shorted, Steering Wheel Module Coil circuit poor electrical connection.
- 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.
Code B0042 Buick Description
- A dual-stage inflatable restraint steering wheel module
- The inflatable restraint steering wheel module coil
- The steering wheel module high circuits for both stages 1 and 2
- The steering wheel module low circuits for both stages 1 and 2
There are 2 shorting bars used within the steering wheel module coil connector. These shorting bars short together both stages of the steering wheel module high circuit and the steering wheel module low circuit when the connector is disconnected. This helps prevent unwanted deployment of the inflator module during servicing. During a frontal crash of sufficient force the inflatable restraint Sensing and Diagnostic Module (SDM) will allow current to flow through the deployment loop. This flow of current will deploy the steering wheel module. The SDM performs continuous diagnostic tests on the deployment loops to check for proper circuit continuity and for shorts to ground or voltage. If a malfunction is detected, a DTC will be stored in memory.
What are the Possible Causes of the DTC B0042 Buick?
- Faulty Steering Wheel Module Coil
- Steering Wheel Module Coil harness is open or shorted
- Steering Wheel Module Coil circuit poor electrical connection
- Faulty Steering Wheel Module
How to Fix the DTC B0042 Buick?
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 is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B0042 Buick 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.
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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 B0042 Buick Code
1. What are the common symptoms of OBDII code B0042 in a Buick related to Driver Frontal Deployment Loop Stage 2 Resistance Low?
- Common symptoms may include the airbag warning light illuminating on the dashboard and a potential non-deployment of the driver's side airbag in the event of a collision.
2. What are some possible causes of OBDII code B0042 in a Buick?
- Possible causes may include a faulty driver's side frontal airbag, damaged wiring in the airbag system, or issues with the airbag control module.
3. How can I diagnose the underlying issue causing OBDII code B0042 in my Buick?
- To diagnose the issue, specialized diagnostic tools are required to retrieve the specific error codes from the airbag system. Professional technicians can use these codes to pinpoint the exact cause of the problem.
4. Is it safe to continue driving my Buick with OBDII code B0042 related to Driver Frontal Deployment Loop Stage 2 Resistance Low?
- It is not recommended to drive the vehicle with this issue as it may compromise the effectiveness of the driver's side airbag in the event of an accident.
5. What are some repair tips for addressing OBDII code B0042 in a Buick?
- Repair tips may include inspecting and repairing any damaged wiring in the airbag system, replacing the driver's side frontal airbag if faulty, or reprogramming the airbag control module.
6. Can I reset the OBDII code B0042 in my Buick on my own?
- While you may be able to clear the error code temporarily using an OBDII scanner, it is crucial to address the underlying issue causing the code to prevent it from reoccurring.
7. Are there any safety precautions I should take when working on the airbag system to resolve OBDII code B0042 in my Buick?
- It is highly recommended to disconnect the vehicle's battery and wait for at least 10 minutes before working on the airbag system to prevent accidental deployment.
8. How much does it typically cost to repair OBDII code B0042 in a Buick at a professional auto repair shop?
- The cost of repair can vary depending on the exact cause of the issue, but it may involve parts replacement, labor costs, and diagnostic fees, which can add up to a few hundred dollars.
9. Can OBDII code B0042 in a Buick be related to any recent impact or collision the vehicle was involved in?
- Yes, the code may be triggered by a recent impact or collision that could have damaged the driver's side frontal airbag or the wiring in the airbag system.
10. Is there a recall or technical service bulletin related to OBDII code B0042 in Buick vehicles?
- It is advisable to check with the manufacturer or a Buick dealership to inquire about any recalls or technical service bulletins related to this specific OBDII code to see if your vehicle is eligible for any repairs or replacements.
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