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Engine-Codes – Generic – B1151

B1151 Code - Left Side Curtain Air Bag Module Short

Quick Answer

The B1151 code indicates a problem with the left side curtain airbag module in the vehicle. Common causes include Wiring or connector damage or corrosion in the left side curtain airbag circuit, Faulty left side curtain airbag module, Issues with the airbag control 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
B1151 indicates Left Side Curtain Air Bag Module Short.
Common causes
Common causes include Wiring or connector damage or corrosion in the left side curtain airbag circuit, Faulty left side curtain airbag module, Issues with the airbag control 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 16, 2024
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Code B1151 Description

The B1151 code indicates a problem with the left side curtain airbag module in the vehicle. The curtain airbag is a safety feature designed to deploy from the roof lining to protect occupants in the event of a side impact or rollover. A short in the left side curtain airbag module means that there is an electrical issue causing a disruption in the proper functioning of the airbag system.

OBDII Code B1151 - Left Side Curtain Air Bag Module Short
B1151 Code - Left Side Curtain Air Bag Module Short

Common Causes of B1151

  1. Wiring or connector damage or corrosion in the left side curtain airbag circuit.
  2. Faulty left side curtain airbag module.
  3. Issues with the airbag control module.
  4. Impact or collision that damaged the left side curtain airbag system.
  5. Electrical issues in the vehicle's wiring harness affecting the left side curtain airbag circuit.

Symptoms of B1151

  1. Illumination of the airbag warning light on the dashboard.
  2. Diagnostic trouble codes related to the airbag system stored in the vehicle's computer.
  3. Inability to reset the airbag system after attempting to clear the code.
  4. Failure of the left side curtain airbag to deploy during a crash test.

How to Fix B1151

  1. Begin by diagnosing the specific cause of the short in the left side curtain airbag module using a diagnostic scanner to retrieve the trouble codes and pinpoint the issue.
  2. Inspect the wiring and connectors in the left side curtain airbag circuit for damage, corrosion, or loose connections. Repair or replace any damaged components.
  3. Test the left side curtain airbag module for proper functioning. If it is found to be faulty, replace it with a new module.
  4. Clear the diagnostic trouble codes from the vehicle's computer and reset the airbag system.
  5. Perform a thorough test of the airbag system to ensure that the left side curtain airbag deploys correctly in a controlled environment.

Cost to Fix B1151

The cost of repairing a left side curtain airbag module short can vary depending on the specific cause of the issue and the make and model of the vehicle. In general, the cost of parts for a new left side curtain airbag module can range from $200 to $600, while the labor cost for diagnosis and repair can range from $150 to $300. Overall, the total repair cost for addressing a B1151 code may fall between $350 and $900. It is important to note that labor rates and part prices can vary significantly based on location and the specific circumstances of the repair. It is advisable to consult with a qualified mechanic or repair shop to obtain an accurate cost estimate for addressing this issue.

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Code B1151 Information for Specific Makes

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.

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