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B1742 Hyundai Code - Pressure-Side Impact Sensor Front Driver Communication Error

Quick Answer

The B1742 Hyundai code indicates a communication error between the pressure-side impact sensor located on the front driver's side of the vehicle and the vehicle's communication network. Common causes include Damaged wiring connecting the impact sensor to the ECU, Faulty pressure-side impact sensor, Corrosion or loose connections in the sensor or ECU. 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
B1742 Hyundai indicates Pressure-Side Impact Sensor Front Driver Communication Error.
Common causes
Common causes include Damaged wiring connecting the impact sensor to the ECU, Faulty pressure-side impact sensor, Corrosion or loose connections in the sensor or ECU.
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 08, 2024
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Code B1742 Hyundai Description

The B1742 Hyundai code indicates a communication error between the pressure-side impact sensor located on the front driver's side of the vehicle and the vehicle's communication network. The pressure-side impact sensor is a crucial component of the vehicle's safety system, responsible for detecting impacts and deploying the appropriate safety measures, such as airbag deployment. When this sensor fails to communicate properly with the vehicle's system, it can lead to a potential safety issue as the airbags may not deploy in the event of a collision.

OBDII Code B1742 Hyundai - Pressure-Side Impact Sensor Front Driver Communication Error
B1742 Hyundai Code - Pressure-Side Impact Sensor Front Driver Communication Error

Common Causes of B1742 Hyundai

  1. Damaged wiring connecting the impact sensor to the ECU
  2. Faulty pressure-side impact sensor
  3. Corrosion or loose connections in the sensor or ECU
  4. Issues with the vehicle's communication network
  5. Impact or collision causing damage to the sensor or wiring

Symptoms of B1742 Hyundai

  1. Airbag warning light illuminated on the dashboard
  2. Inconsistent or erratic airbag deployment
  3. Loss of communication with the impact sensor
  4. Vehicle may fail safety inspections
  5. Vehicle may not pass emissions testing

How to Fix B1742 Hyundai

  1. Start by performing a thorough inspection of the wiring connecting the impact sensor to the ECU. Look for any signs of damage, corrosion, or loose connections. Repair or replace any damaged wiring.
  2. Test the pressure-side impact sensor to determine if it is functioning correctly. If the sensor is faulty, replace it with a new one.
  3. Check for any corrosion or loose connections in the sensor or ECU. Clean and secure any connections as needed.
  4. Clear the diagnostic trouble codes from the vehicle's system and perform a test drive to ensure the issue has been resolved.
  5. If the issue persists, consult with a professional technician or dealership for further diagnosis and repair.

Cost to Fix B1742 Hyundai

The cost of repairing a B1742 Hyundai code can vary depending on the specific cause of the issue and the extent of the repairs needed. On average, the cost of replacing a pressure-side impact sensor can range from $200 to $500, including parts and labor. However, additional costs may be incurred if wiring repairs or ECU diagnosis is needed. It's recommended to consult with a professional technician for a more accurate estimate based on your vehicle's make and model. Keep in mind that labor rates vary by location and the type of repair facility.

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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.

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 B1742 Hyundai Code

1. What are the common symptoms of OBDII code B1742 Hyundai?

- Common symptoms of this code include the airbag warning light illuminating on the dashboard and potential issues with the front driver side impact sensor.

2. What does the OBDII code B1742 Hyundai indicate?

- The code B1742 indicates a communication error related to the pressure-side impact sensor on the front driver side of the vehicle.

3. What are the possible causes of the B1742 Hyundai code?

- Possible causes of this code include damaged wiring or connectors, a faulty impact sensor, or issues with the airbag control module.

4. How can I diagnose the B1742 Hyundai code?

- Diagnosis involves using an OBDII scanner to retrieve the specific code, inspecting the wiring and connectors for damage, and testing the front driver side impact sensor for proper functionality.

5. Can I drive my vehicle with the B1742 Hyundai code present?

- It is not recommended to drive the vehicle with the B1742 code active, as it indicates a potential issue with the front driver side impact sensor, which is crucial for airbag deployment in the event of a collision.

6. How can I repair the B1742 Hyundai code?

- Repairing the B1742 code typically involves repairing or replacing damaged wiring or connectors, replacing the front driver side impact sensor if faulty, and clearing the code with an OBDII scanner.

7. Is it safe to reset the B1742 Hyundai code without addressing the underlying issue?

- It is not safe to simply reset the code without investigating and addressing the underlying cause, as it could lead to potential safety risks in the event of a collision.

8. Can I repair the B1742 Hyundai code myself, or do I need a professional mechanic?

- While some basic diagnostics and repairs can be done by DIY enthusiasts, it is recommended to consult a professional mechanic for accurate diagnosis and proper repair of the B1742 code.

9. How much does it typically cost to repair the B1742 Hyundai code?

- The cost of repairing the B1742 code can vary depending on the extent of the issue, but it may involve costs for parts replacement, labor, and diagnostic services.

10. Will fixing the B1742 Hyundai code require resetting the airbag system?

- In some cases, repairing the B1742 code may involve resetting the airbag system to clear the error code and ensure proper functionality of the impact sensor and airbag system.

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