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B1145 Infiniti Code - Right Side Curtain Air Bag Module Open

Quick Answer

The B1145 code for Infiniti vehicles indicates a problem with the right side curtain airbag module being open. Common causes include Faulty right side curtain airbag module, Loose or corroded connectors in the airbag system, Damaged wiring harness supplying power to the airbag module. 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
B1145 Infiniti indicates Right Side Curtain Air Bag Module Open.
Common causes
Common causes include Faulty right side curtain airbag module, Loose or corroded connectors in the airbag system, Damaged wiring harness supplying power to the airbag module.
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 B1145 Infiniti Description

The B1145 code for Infiniti vehicles indicates a problem with the right side curtain airbag module being open. The curtain airbag system is an essential safety feature designed to protect occupants in the event of a side collision or rollover. When this code is triggered, it means that the airbag module on the right side of the vehicle is not functioning properly or is unable to deploy in the event of a crash.

OBDII Code B1145 Infiniti - Right Side Curtain Air Bag Module Open
B1145 Infiniti Code - Right Side Curtain Air Bag Module Open

Common Causes of B1145 Infiniti

  1. Faulty right side curtain airbag module
  2. Loose or corroded connectors in the airbag system
  3. Damaged wiring harness supplying power to the airbag module
  4. Short or open circuit in the airbag system
  5. Impact or collision that may have damaged the airbag module or wiring

Symptoms of B1145 Infiniti

  1. Airbag warning light illuminated on the dashboard
  2. Diagnostic trouble code (DTC) B1145 stored in the vehicle's computer system
  3. Inability of the right side curtain airbag to deploy in a crash
  4. Vehicle may fail safety inspections due to airbag system malfunction

How to Fix B1145 Infiniti

  1. Begin by performing a thorough inspection of the right side curtain airbag module, connectors, and wiring harness to identify any visible signs of damage or corrosion.
  2. Use a diagnostic scan tool to retrieve the specific trouble code (B1145) and further diagnose the issue with the airbag system.
  3. If the problem is identified as a faulty airbag module, it will need to be replaced with a new one from the manufacturer to ensure proper functionality.
  4. Repair any damaged wiring or connectors in the airbag system and ensure all connections are secure and free of corrosion.
  5. Clear the diagnostic trouble code from the vehicle's computer system and test the airbag system to verify that the issue has been resolved.

Cost to Fix B1145 Infiniti

The cost of repairing a right side curtain airbag module open issue can vary depending on the extent of the damage and the specific components that need to be replaced. In general, the cost of a new airbag module can range from $200 to $600, while labor costs for diagnosis and repair can add an additional $100 to $200. Overall, the total repair cost for addressing a B1145 code in an Infiniti vehicle may range from $300 to $800. It's important to note that labor rates at auto repair shops can vary, so it's advisable to check with local shops for a more accurate estimate based on your location and vehicle model.

Need more information about the B1145 Infiniti code?

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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 B1145 Infiniti Code

1. What does the OBDII code B1145 mean on an Infiniti?

The B1145 code indicates an open circuit in the right side curtain airbag module, signaling an electrical issue in the airbag system.

2. What are the symptoms of a B1145 code on an Infiniti?

Common symptoms include the airbag warning light staying illuminated and the airbag system being disabled.

3. What causes the B1145 code to appear?

The primary causes include a damaged airbag module, corroded or loose electrical connections, or a broken wire in the airbag circuit.

4. Is it safe to drive with the B1145 code active?

No, it is not safe as the airbag system may not function properly during an accident, increasing the risk of injury.

5. How is the B1145 code diagnosed?

A technician will use a scan tool to confirm the code, inspect the wiring and connectors for damage, and test the airbag module for continuity.

6. Can I fix the B1145 code myself?

If you have experience with electrical diagnostics, you can inspect and repair damaged wiring or connectors. However, airbag repairs are best left to professionals due to safety concerns.

7. How much does it cost to repair the B1145 code?

Repair costs vary depending on the issue but can range from $100 for wiring repairs to $800 or more if the airbag module needs replacing.

8. Can a weak battery cause the B1145 code?

A weak or failing battery can sometimes lead to electrical issues, but it is not a common cause of this specific code.

9. Will clearing the B1145 code solve the problem?

Clearing the code without addressing the underlying issue will only temporarily erase it, and the code will likely return.

10. How do I prevent the B1145 code from occurring?

Regularly inspect your vehicle’s wiring and connectors for damage, and ensure the airbag system is serviced by a professional if needed.

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