B0042 Chevrolet 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 Chevrolet 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 Chevrolet 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 Chevrolet?
- 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 Chevrolet?
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 Chevrolet 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 Chevrolet Code
1. What are the common symptoms of OBDII code B0042 in a Chevrolet related to Driver Frontal Deployment Loop Stage 2 Resistance Low?
- Common symptoms include the airbag warning light coming on, the airbag system malfunctioning, and potential non-deployment of the driver frontal airbag in a crash.
2. What are the possible causes of OBDII code B0042 in a Chevrolet?
- The code B0042 indicates that there is low resistance in the driver frontal airbag deployment loop stage 2. Causes can include faulty wiring, a damaged clock spring, or a problem with the airbag module.
3. How can I diagnose the OBDII code B0042 in a Chevrolet?
- Diagnosing code B0042 involves using a scan tool to read the error code, visually inspecting the airbag system wiring, checking the clock spring for damage, and testing the airbag module.
4. Is it safe to drive with OBDII code B0042 in a Chevrolet?
- It is not recommended to drive with code B0042 present as it indicates a problem with the driver frontal airbag system, which could potentially lead to the airbag not deploying in an accident.
5. How can I repair OBDII code B0042 in a Chevrolet?
- Repairing code B0042 may involve repairing or replacing damaged wiring, replacing the clock spring if faulty, or replacing the airbag module if necessary. It is recommended to have a professional mechanic perform the repairs.
6. Can I reset OBDII code B0042 in a Chevrolet with a basic OBDII scanner?
- While you can clear the error code with a basic OBDII scanner, it is important to address the underlying issue causing code B0042 to prevent potential safety risks associated with the airbag system.
7. How much does it typically cost to fix OBDII code B0042 in a Chevrolet at a repair shop?
- The cost of fixing code B0042 can vary depending on the exact cause of the issue and the labor rates of the repair shop. Repairs may range from a few hundred to over a thousand dollars.
8. Are there any recalls or technical service bulletins related to OBDII code B0042 in Chevrolet vehicles?
- It is recommended to check with Chevrolet or the National Highway Traffic Safety Administration (NHTSA) to see if there are any recalls or technical service bulletins related to code B0042 in your specific Chevrolet model.
9. Can a DIY enthusiast with some automotive experience fix OBDII code B0042 in a Chevrolet?
- While some DIY enthusiasts may have the skills to diagnose and repair code B0042, dealing with airbag systems can be dangerous. It is recommended to consult a professional mechanic for proper diagnosis and repair.
10. How often should I have the airbag system in my Chevrolet inspected to prevent issues like OBDII code B0042?
- It is recommended to have the airbag system inspected as part of regular maintenance or during any service that may impact the system's components. Regular inspections can help catch issues early and prevent safety risks.
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