B1042 Code - Diagnosis Sensor Unit
Quick Answer
The Air Bag Diagnosis Sensor Unit detects the whole SRS electrical system and displays the malfunction either by illuminating or blinking the air bag warning lamp in the combination meter. Common causes include Faulty Diagnosis Sensor Unit, Diagnosis Sensor Unit harness is open or shorted, Diagnosis Sensor Unit 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
- B1042 indicates Diagnosis Sensor Unit.
- Common causes
- Common causes include Faulty Diagnosis Sensor Unit, Diagnosis Sensor Unit harness is open or shorted, Diagnosis Sensor Unit 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 B1042 Description
The Air Bag Diagnosis Sensor Unit contains the “G†sensors for both frontal and side collisions and spare battery function in case of main battery damaged in a collision.
What are the Possible Causes of the DTC B1042?
- Faulty Diagnosis Sensor Unit
- Diagnosis Sensor Unit harness is open or shorted
- Diagnosis Sensor Unit circuit poor electrical connection
How to Fix the DTC B1042?
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 B1042 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 B1042 code?
Need more information on how to fix the B1042 code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the B1042 code diagnosed by a professional: Find a repair shop in your area
Information for Specific Makes
- B1042 Infiniti — Diagnosis Sensor Unit
- B1042 Nissan — Diagnosis Sensor Unit
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 B1042 Code
1. What are the common symptoms of OBDII code B1042 related to the Diagnosis Sensor Unit?
The common symptoms include issues with the airbag system, such as the airbag warning light staying illuminated on the dashboard.
2. What could be the possible causes of OBDII code B1042?
One of the common causes of this code is a malfunction in the Diagnosis Sensor Unit itself, which may be due to electrical faults or internal component failure.
3. How serious is OBDII code B1042 related to the Diagnosis Sensor Unit?
This code is considered a serious issue as it directly affects the proper functioning of the airbag system, which is a critical safety feature in the vehicle.
4. How can I diagnose OBDII code B1042 related to the Diagnosis Sensor Unit?
Diagnosing this code typically requires using a professional OBDII scanner to retrieve the specific fault codes and then further testing the Diagnosis Sensor Unit for any issues.
5. What are some repair tips for fixing OBDII code B1042?
Repairing this code often involves inspecting the Diagnosis Sensor Unit for any visible damage or loose connections, and if necessary, replacing the faulty unit with a new one.
6. Can I drive my vehicle with OBDII code B1042 present?
It is not recommended to drive the vehicle with this code present, as it indicates a potential problem with the airbag system that could compromise safety in the event of a collision.
7. How much does it typically cost to repair OBDII code B1042 related to the Diagnosis Sensor Unit?
The cost of repairing this code can vary depending on the extent of the issue and the specific vehicle make and model, but it may range from a few hundred to a thousand dollars.
8. Are there any DIY solutions for fixing OBDII code B1042?
While some basic troubleshooting steps can be taken, such as checking for loose connections, it is usually best to have a professional mechanic diagnose and repair this code to ensure proper safety system functionality.
9. Can OBDII code B1042 be intermittent or permanent?
This code can be either intermittent or permanent, with intermittent cases possibly being triggered by specific driving conditions or electrical fluctuations.
10. How long does it typically take to repair OBDII code B1042 related to the Diagnosis Sensor Unit?
The repair time can vary depending on the exact cause of the issue and the availability of replacement parts, but technicians may require a few hours to a full day to diagnose and fix the problem.
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